1957-93 - occ educ and occ inc
                                                           WLS4114
                                                              9/00
                     Wisconsin Longitudinal Study:
                    1957, TAX, 1964, 1975, and 1977
                   (added for 9/00 release: WLS23_6)

                                                                    Frequencies
Columns   VName     Codes     Description                            Men  Women

4114-4117 OCEH57    1970 Occupational Education Score for Head of
                    Household in 1957 (Q62)  (Added 9/00)

                 0008-0995      1970 Education Score                  4458 4917

                 9997           Don't know                              23   30
                 9998           Inappropriate-- answered "never         74   83
                                worked" to Q62 of 1975
                                Questionnaire
                 9999           Not ascertained or nonrespondent       437  295
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4118-4121 OCIH57    1970 Occupational Income Score for Head of
                    Household in 1957 (Q62)  (Added 9/00)

                 0000-0877      1970 Income Score                     4458 4917

                 9997           Don't know                              23   30
                 9998           Inappropriate-- answered "never         74   83
                                worked" to Q62 of 1975
                                Questionnaire
                 9999           Not ascertained or nonrespondent       437  295
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4122-4125 OCEM57    1970 Occupational Education Score of Mother
                    When Respondent was a Senior in 1957
                    (Q61a, 62, 62e, 68a) (Added 9/00)

                 0015-0991      1970 Education Score                  1608 1899

                 9997           Don't know                              38   23
                 9998           Inappropriate-- mother did not work   2914 3111
                                (WRMO57 = 2,8)
                 9999           Not ascertained or nonrespondent       432  292
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4126-4129 OCIM57    1970 Occupational Income Score of Mother
                    When Respondent Was a Senior in 1957
                    (Q61a, 62, 62e, 68a) (Added 9/00)

                 0002-0804      1970 Income Score                     1608 1899

                 9997           Don't know                              38   23
                 9998           Inappropriate-- mother did not work   2914 3111
                                (WRMO57 = 2,8)
                 9999           Not ascertained or nonrespondent       432  292
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4130-4133 OCESIB    1970 Occupational Education Score of Selected
                    Sibling in 1975 (Q82, 84) (Added 9/00)

                 0015-0995      1970 Education Score                  2661 3069

                 9997           Don't know                             111  158
                 9998           Inappropriate-- has no living         1496 1507
                                siblings (SIBSLV=0) or selected
                                sibling does not work (INSIB =
                                996)
                 9999           Not ascertained or nonrespondent       724  591
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4134-4137 OCISIB    1970 Occupational Income Score of Selected
                    Sib in 1975 (Q82, 84) (Added 9/00)

                 0000-0877      1970 Income Score                     2661 3069

                 9997           Don't know                             111  158
                 9998           Inappropriate-- has no living         1496 1507
                                siblings (SIBSLV=0) or selected
                                sibling does not work (INSIB =
                                996)
                 9999           Not ascertained or nonrespondent       724  591
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4138-4141 OCEZ      1970 Occupational Education Score for the Job
                    Respondent Expected to Have When Respondent was
                    a Senior in High School (Q89)  (Added 9/00)

                 0025-0991      1970 Education Score                  2844 3986

                 9997           Don't know                            1447  873
                 9998           Inappropriate                            0   77
                 9999           Not ascertained or nonrespondent       701  389
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4142-4145 OCIZ      1970 Occupational Income Score for the Job
                    Respondent Expected to Have When Respondent Was
                    a Senior in High School (Q89)  (Added 9/00)

                 0002-0877      1970 Income Score                     2844 3986

                 9997           Don't know                            1447  873
                 9998           Inappropriate                            0   77
                 9999           Not ascertained or nonrespondent       701  389
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4146-4149 OCEX1     1970 Occupational Education Score for
                    Respondent's First Job (Q11a) (Added 9/00)

                 0008-0995      1970 Education Score                  4314 4648

                 9997           Don't know                               2    2
                 9998           Inappropriate--never worked at a       213  339
                                full-time civilian job since
                                completing formal school (JOBED =
                                0) or presently enrolled in a
                                formal program in a college, junior
                                college or university (EDCURR = 1)
                 9999           Not ascertained or nonrespondent       463  336
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4150-4153 OCIX1     1970 Occupational Income Score for
                    Respondent's First Job (Q11a) (Added 9/00)

                 0000-0877      1970 Income Score                     4314 4648

                 9997           Don't know                               2    2
                 9998           Inappropriate--never worked at a       213  339
                                full-time civilian job since
                                completing formal school (JOBED =
                                0) or presently enrolled in a
                                formal program in a college, junior
                                college or university (EDCURR = 1)
                 9999           Not ascertained or nonrespondent       463  336
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4154-4157 OCEX70    1970 Occupational Education Score for
                    Respondent's Job in March, 1970 (Q18b)
                    (Added 9/00)

                 0021-0995      1970 Education Score                  4128 2138

                 9997           Don't know                               2    4
                 9998           Inappropriate--not working at a        200 2665
                                civilian job in March, 1970
                                (JBC70 = 2 or 3)
                 9999           Not ascertained or nonrespondent       662  518
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4158-4161 OCIX70    1970 Occupational Income Score for
                    Respondent's Job in March, 1970 (Q18b)
                    (Added 9/00)

                 0002-0877      1970 INCOME SCORE                     4128 2138

                 9997           Don't know                               2    4
                 9998           Inappropriate--not working at a        200 2665
                                civilian job in March, 1970
                                (JBC70 = 2 or 3)
                 9999           Not ascertained or nonrespondent       662  518
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4162-4165 OCE74     1970 Occupational Education Score for
                    Respondent's Longest Job in 1974 (Q28, 56, 57)
                    (Added 9/00)

                 0016-0995      1970 Education Score                  4270 3123

                 9998           Inappropriate--nonworker (WRWK74 =      19 1679
                                0)
                 9999           Not ascertained or nonrespondent       703  523
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4166-4169 OCI74     1970 Occupational Income Score for
                    Respondent's Longest Job in 1974 (Q28,
                    56, 57) (Added 9/00)

                 0002-0877      1970 INCOME SCORE                     4270 3123

                 9998           Inappropriate--nonworker (WRWK74 =      19 1679
                                 0)
                 9999           Not ascertained or nonrespondent       703  523
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4170-4173 OCEXCR    1970 Occupational Education Score for
                    Respondent's Current or Last Job (Q28)
                    (Added 9/00)

                 0015-0995      1970 Education Score                  4490 3612

                 9997           Don't know                               0    1
                 9998           Inappropriate--unemployed and has       43 1426
                                never worked full-time at least two
                                consecutive weeks or NILF and
                                has not worked for pay at a regular
                                job or business within the last
                                five years (LFCIVS = 3)
                 9999           Not ascertained or nonrespondent       459  286
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4174-4177 OCIXCR    1970 Occupational Income  Score for
                    Respondent's Current or Last Job (Q28)
                    (Added 9/00)

                 0002-0877      1970 INCOME SCORE                     4490 3612

                 9997           Don't know                               0    1
                 9998           Inappropriate--unemployed and has       43 1426
                                never worked full-time at least two
                                consecutive weeks or NILF and
                                has not worked for pay at a regular
                                job or business within the last
                                five years (LFCIVS = 3)
                 9999           Not ascertained or nonrespondent       459  286
                                in both 1975 and 1992/93 interviews
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4178-4181 OCER10    1970 Occupational Education Score for
                    Respondent's Preferred Job 10 Years From Now
                    (Q28, 48)  (Added 9/00)

                 0019-0995      1970 Education Score                  3703 3537

                 9997           Don't know                              11    4
                 9998           Inappropriate--would not like to       485 1100
                                be working ten years from now or
                                does not know if wants to be
                                working ten years from now (JB10YR
                                = 2, 3 or 7)
                 9999           Not ascertained or nonrespondent       793  684
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4182-4185 OCIR10    1970 Occupational Income Score for
                    Respondent's Preferred Job 10 Years From Now
                    (Q28, 48)  (Added 9/00)

                 0002-0877      1970 INCOME SCORE                     3703 3537

                 9997           Don't know                              11    4
                 9998           Inappropriate--would not like to       485 1100
                                be working ten years from now or
                                does not know if wants to be
                                working ten years from now (JB10YR
                                = 2, 3 or 7)
                 9999           Not ascertained or nonrespondent       793  684
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.


4186-4189 OCECRS    1970 Occupational Education Score of Current
                    Spouse's Current or Last Job (Q102)
                    (Added 9/00)

                 0013-0995      1970 Education Score                  1630 4145

                 9997           Don't know                               2    2
                 9998           Inappropriate--not currently          2682  602
                                married (MRSTAT=1,3-5), spouse
                                never worked (INCRS=991)
                                or student, keeping house or other
                                (MRCRS = 0,6,7)
                 9999           Not ascertained or nonrespondent       678  576
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4190-4193 OCICRS    1970 Occupational Income Score of Current
                    Spouse's Current or Last Job (Q102)
                    (Added 9/00)

                 0000-0877      1970 INCOME SCORE                     1630 4145

                 9997           Don't know                               2    2
                 9998           Inappropriate--not currently          2682  602
                                married (MRSTAT=1,3-5), spouse
                                never worked (INCRS=991)
                                or student, keeping house or other
                                (MRCRS = 0,6,7)
                 9999           Not ascertained or nonrespondent       678  576
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4194-4197 OCESPH    1970 Occupational Education Score of Current
                    Spouse's Head of Household When Spouse was 16
                    (Q109) (Added 9/00)

                 0008-0995      1970 Education Score                  3595 3812

                 9997           Don't know                              38   76
                 9998           Inappropriate--not currently           654  883
                                married (MRSTAT=1,3-5), spouse's
                                head of household never worked
                                (INSPHH=991) or answered
                                "don't know" to Q109 of 1975
                                questionnaire (INSPHH=997)
                 9999           Not ascertained or nonrespondent       705  554
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4198-4201 OCISPH    1970 Occupational Income Score of Current
                    Spouse's Head of Household When Spouse was 16
                    (Q109) (Added 9/00)

                 0000-0877      1970 Income Score                     3595 3812

                 9997           Don't know                              38   76
                 9998           Inappropriate--not currently           654  883
                                married (MRSTAT=1,3-5), spouse's
                                head of household never worked
                                (INSPHH=991) or answered
                                "don't know" to Q109 of 1975
                                questionnaire (INSPHH=997)
                 9999           Not ascertained or nonrespondent       705  554
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4202-4205 OCESK     1970 Occupational Education Score of
                    Respondent's Occupational Aspiration For Child
                    (Q122)  (Added 9/00)

                 0035-0974      1970 Education Score                  1272 1553

                 9997           Don't know                            1802 1969
                 9998           Inappropriate--never married          1079 1096
                                (KIDSNO=99), childless (KIDSNO=0),
                                randomly selected child is
                                deceased (EDASSK=69) or student
                                responded housewife , no preference,
                                don't care, any job that makes
                                money or other (OCEXSK=993-996)
                 9999           Not ascertained or nonrespondent       839  707
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4206-4209 OCISK     1970 Occupational Income Score of
                    Respondent's Occupational Aspiration For Child
                    (Q122)  (Added 9/00)

                 0008-0877      1970 Income  Score                    1272 1553

                 9997           Don't know                            1802 1969
                 9998           Inappropriate--never married          1079 1096
                                (KIDSNO=99), childless (KIDSNO=0),
                                randomly selected child is
                                deceased (EDASSK=69) or student
                                responded housewife , no preference,
                                don't care, any job that makes
                                money or other (OCEXSK=993-996)
                 9999           Not ascertained or nonrespondent       839  707
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4210-4213 OCEDXSK   1970 Occupational Education Score for
                    Respondent's Occupational Expectation For Child
                    (Q123)  (Added 9/00)

                 0025-0979      1970 Education Score                  1290 2042

                 9997           Don't know                            2141 1809
                 9998           Inappropriate--never married           739  736
                                (KIDSNO=99), childless (KIDSNO=0),
                                randomly selected child is
                                deceased (EDASSK=69) or student
                                responded housewife , no preference,
                                don't care, any job that makes
                                money or other (OCEXSK=993-996)
                 9999           Not ascertained or nonrespondent       822  738
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4214-4217 OCIXSK    1970 Occupational Income Score for
                    Respondent's Occupational Expectation For Child
                    (Q123)  (Added 9/00)


                 0008-0877      1970 Income  Score                    1290 2042

                 9997           Don't know                            2141 1809
                 9998           Inappropriate--never married           739  736
                                (KIDSNO=99), childless (KIDSNO=0),
                                randomly selected child is
                                deceased (EDASSK=69) or student
                                responded housewife , no preference,
                                don't care, any job that makes
                                money or other (OCEXSK=993-996)
                 9999           Not ascertained or nonrespondent       822  738
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4218-4221 OCEWBM    1970 Occupational Education Score of
                    Respondent's Occupation Before Marriage
                    (Q125d(0), 125h(0), 125j(0))  (Added 9/00)

                 0016-0987      1970 Education Score                     0 4248

                 9997           Don't know                               0    1
                 9998           Inappropriate--male or never          4331  530
                                married (WWWRBM=8), not employed
                                before marriage (WWWRBM=2) or
                                worked less than fifteen hours a
                                week at own family business or farm
                                without pay (WWWRBM=3)
                 9999           Not ascertained or nonrespondent       661  546
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4222-4225 OCIWBM    1970 Occupational Income Score of
                    Respondent's Occupation Before Marriage
                    (Q125d(0), 125h(0), 125j(0))  (Added 9/00)

                 0000-0803      1970 Income  Score                       0 4248

                 9997           Don't know                               0    1
                 9998           Inappropriate--male or never          4331  530
                                married (WWWRBM=8), not employed
                                before marriage (WWWRBM=2) or
                                worked less than fifteen hours a
                                week at own family business or farm
                                without pay (WWWRBM=3)
                 9999           Not ascertained or nonrespondent       661  546
                                or military occupation


NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4226-4229 OCEMW1    1970 Occupational Education Score of
                    Respondent Between (first) Marriage and First
                    Birth (Q125d(1), 125h(1), 125j(1))  (Added 9/00)

                 0016-0987      1970 Education Score                     0 3288

                 9997           Don't know                               0    1
                 9998           Inappropriate--male (SEXRSP=1),       4331 1490
                                never married (MARST=1),
                                childless (KIDSNO=0), not
                                employed between marriage and first
                                birth (WWWRM1 = 2) or worked
                                without pay at family business or
                                farm (WWWRM1=3)
                 9999           Not ascertained or nonrespondent       661  546
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4230-4233 OCIMW1    1970 Occupational Income Score of
                    Respondent Between (first) Marriage and First
                    Birth (Q125d(1), 125h(1), 125j(1))  (Added 9/00)

                 0000-0803      1970 Income Score                        0 3288

                 9997           Don't know                               0    1
                 9998           Inappropriate--male (SEXRSP=1),       4331 1490
                                never married (MARST=1),
                                childless (KIDSNO=0), not
                                employed between marriage and first
                                birth (WWWRM1 = 2) or worked
                                without pay at family business or
                                farm (WWWRM1=3)
                 9999           Not ascertained or nonrespondent       661  546
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4234-4237 OCEW12    1970 Occupational Education Score of
                    Respondent Between First and Second Birth
                    (Q125d(2), 125h(2), 125j(2)) (Added 9/00)

                 0021-0979      1970 Education Score                     0 1381

                 9997           Don't know                               0    2
                 9998           Inappropriate--male or never          4331 3395
                                married or less than two birth
                                (WWWR12=8), not  employed between
                                first and second birth (WWWR12 = 2)
                                or worked less than fifteen hours a
                                week at family business or farm
                                without pay (WWWR12=3)
                 9999           Not ascertained or nonrespondent       661  547
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4238-4241 OCIW12    1970 Occupational Income Score of
                    Respondent Between First and Second Birth
                    (Q125d(2), 125h(2), 125j(2)) (Added 9/00)

                 0002-0784      1970 Income Score                        0 1381

                 9997           Don't know                               0    2
                 9998           Inappropriate--male or never          4331 3395
                                married or less than two birth
                                (WWWR12=8), not  employed between
                                first and second birth (WWWR12 = 2)
                                or worked less than fifteen hours a
                                week at family business or farm
                                without pay (WWWR12=3)
                 9999           Not ascertained or nonrespondent       661  547
                                or military occupation

4242-4245 OCEW23    1970 Occupational Education of  Respondent
                    Between Second and Third Birth
                    (Q125d(3), 125h(3), 125j(3))  (Added 9/00)

                 0024-0987      1970 Education Score                     0  799

                 9997           Don't know                               0    1
                 9998           Inappropriate--male or never          4331 3981
                                married or less than three births
                                (KIDSNO<3)), not  employed between
                                second and third birth (WWWR23 = 2)
                                or worked less than fifteen hours a
                                week at family business or farm
                                without pay (WWWR23=3)
                 9999           Not ascertained or nonrespondent       661  544
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4246-4249 OCIW23    1970 Occupational Income of  Respondent
                    Between Second and Third Birth
                    (Q125d(3), 125h(3), 125j(3))  (Added 9/00)

                 0002-0784      1970 Income Score                        0  799

                 9997           Don't know                               0    1
                 9998           Inappropriate--male or never          4331 3981
                                married or less than three births
                                (KIDSNO<3)), not  employed between
                                second and third birth (WWWR23 = 2)
                                or worked less than fifteen hours a
                                week at family business or farm
                                without pay (WWWR23=3)
                 9999           Not ascertained or nonrespondent       661  544
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4250-4253 OCEW3L    1970 Occupational Education Score for
                    Respondent Between "Next to Last and Last Birth"
                    (Q125d(4), 125h(4), 125j(4))  (Added 9/00)

                 0019-0972      1970 Education Score                     0  416

                 9997           Don't know                               0    1
                 9998           Inappropriate--male or never          4331 4364
                                married or less than four births
                                (WWWR3L=8), not  employed between
                                "next to last" and "last birth"
                                (WWWR3L=2) or worked less than
                                fifteen hours a week at family
                                business or farm without pay
                                (WWWR3L=3)
                 9999           Not ascertained or nonrespondent       661  544
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4254-4257 OCIW3L    1970 Occupational Income for Respondent
                    Between "Next to Last and Last Birth"
                    (Q125d(4), 125h(4), 125j(4))  (Added 9/00)

                 0004-0787      1970 Income Score                        0  416

                 9997           Don't know                               0    1
                 9998           Inappropriate--male or never          4331 4364
                                married or less than four births
                                (WWWR3L=8), not  employed between
                                "next to last" and "last birth"
                                (WWWR3L=2) or worked less than
                                fifteen hours a week at family
                                business or farm without pay
                                (WWWR3L=3)
                 9999           Not ascertained or nonrespondent       661  544
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4258-4261 OCEYAL    1970 Occupational Education Score for
                    Respondent Between End of Last Period and Time
                    of interview (Q128, 128d, 128f) (Added 9/00)

                 0016-0987      1970 Education Score                     0 3115

                 9997           Don't know                               0    1
                 9998           Inappropriate--male or never          4331 1664
                                married (WWWRAL=8), not employed
                                after end of last period (WWWRAL=
                                2) or worked less than fifteen
                                hours a week at own family business
                                or farm without pay  (WWWR3L=3)
                 9999           Not ascertained or nonrespondent       661  545
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.


4262-4265 OCIYAL    1970 Occupational Income Score for
                    Respondent Between End of Last Period and Time
                    of interview (Q128, 128d, 128f) (Added 9/00)

                 0002-0842      1970 Income Score                        0 3115

                 9997           Don't know                               0    1
                 9998           Inappropriate--male or never          4331 1664
                                married (WWWRAL=8), not employed
                                after end of last period (WWWRAL=
                                2) or worked less than fifteen
                                hours a week at own family business
                                or farm without pay  (WWWR3L=3)
                 9999           Not ascertained or nonrespondent       661  545
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4266-4269 XOCEH57   1970 Occupational Education Score for Head of
                    Household  When Sib-Respondent Was Age 16
                    (Q49)  (Added 9/00)

                 0008-0987      1970 Education Score                  1024 1073

                 9997           Don't know                               8    7
                 9998           Inappropriate--answered "never          10    5
                                worked" to Q49 of 1977
                                Questionnaire
                 9999           Not ascertained, nonsample             177  134
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4270-4273 XOCIH57   1970 Occupational Income Score for Head of
                    Household When  Sib-Respondent Was Age 16
                    (Q49)  (Added 9/00)

                 0003-0877      1970 Income Score                     1024 1073

                 9997           Don't know                               8    7
                 9998           Inappropriate--answered "never          10    5
                                worked" to Q49 of 1977
                                Questionnaire
                 9999           Not ascertained, nonsample             177  134
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4274-4277 XOCEZ     1970 Occupational Education Score for the Job
                    Sib-Respondent Expected to Have When Sib-
                    Respondent Was About 16 Years Old (Q57)
                    (added 9/00)

                 0008-0993      1970 Education Score                   611  819

                 9997           Don't know                             394  244
                 9998           Inappropriate--housewife (XOCZ=          0    0
                                996)
                 9999           Not ascertained, nonsample             214  156
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4278-4281 XOCIZ     1970 Occupational Income Score for the Job
                    Sib-Respondent Expected to Have When Sib-
                    Respondent Was About 16 Years Old (Q57)
                    (added 9/00)

                 0002-0842      1970 Income Score                      611  819

                 9997           Don't know                             394  244
                 9998           Inappropriate--housewife (XOCZ=          0    0
                                996)
                 9999           Not ascertained, nonsample             214  156
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4282-4285 XOCEX1    1970 Occupational Education Score for Sib-
                    Respondent's First Job (Q9) (added 9/00)

                 0019-0995      1970 Education Score                  1010 1014

                 9998           Inappropriate-- never worked at a       32   75
                                full-time civilian job since
                                completing formal school (XJOBED=
                                0) or presently enrolled in a
                                formal program in college, junior
                                college or university (XEDCURR=1)
                 9999           Not ascertained, nonsample             177  130
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4286-4289 XOCIX1    1970 Occupational Income Score for Sib-
                    Respondent's First Job (Q9) (added 9/00)

                 0000-0877      1970 Income Score                     1010 1014

                 9998           Inappropriate-- never worked at a       32   75
                                full-time civilian job since
                                completing formal school (XJOBED=
                                0) or presently enrolled in a
                                formal program in college, junior
                                college or university (XEDCURR=1)
                 9999           Not ascertained, nonsample             177  130
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.


4290-4293 XOCEX70   1970 Occupational Education Score for Sib-
                    Respondent's Job in March, 1970 (Q15a)
                    (added 9/00)

                 0021-0995      1970 Education Score                   927  534

                 9998           Inappropriate-- not working at a       117  555
                                civilian job in March, 1970 (XJBC70
                                = 2 or 3)
                 9999           Not ascertained, nonsample             175  130
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4294-4297 XOCIX70   1970 Occupational Income Score for Sib-
                    Respondent's Job in March, 1970 (Q15a)
                    (added 9/00)

                 0003-0877      1970 Income Score                      927  534

                 9998           Inappropriate-- not working at a       117  555
                                civilian job in March, 1970 (XJBC70
                                = 2 or 3)
                 9999           Not ascertained, nonsample             175  130
                                or military occupation


NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4298-4301 XOCE76    1970 Occupational Education Score for Sib-
                    Respondent's Longest Job in 1976 (Q39, 19)
                    (added 9/00)

                 0021-0995      1970 Education Score                  1007  728

                 9998           Inappropriate--nonworker                18  360
                                (XWRWK76 = 0)
                 9999           Not ascertained, nonsample             194  131
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4302-4305 XOCI76    1970 Occupational Income Score for Sib-
                    Respondent's Longest Job in 1976 (Q39, 19)
                    (added 9/00)

                 0002-0877      1970 Income Score                     1007  728

                 9998           Inappropriate--nonworker                18  360
                                (XWRWK76 = 0)
                 9999           Not ascertained, nonsample             194  131
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4306-4309 XOCEXCR   1970 Occupational Education Score For Sib-
                    Respondent's Current or Last Job (Q19)
                    (added 9/00)

                 0021-0995      1970 Education Score                  1023  832

                 9998           Inappropriate--unemployed and            3  256
                                hasn't worked for pay at a regular
                                job or business within last five
                                years or NILF and hasn't worked for
                                pay at a regular job or business
                                within last five years (XLFCIVS=3)
                 9999           Not ascertained, nonsample             193  131
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4310-4313 XOCIXCR   1970 Occupational Income  Score For Sib-
                    Respondent's Current or Last Job (Q19)
                    (added 9/00)

                 0002-0877      1970 Income Score                     1023  832

                 9998           Inappropriate--unemployed and            3  256
                                hasn't worked for pay at a regular
                                job or business within last five
                                years or NILF and hasn't worked for
                                pay at a regular job or business
                                within last five years (XLFCIVS=3)
                 9999           Not ascertained, nonsample             193  131
                                or military occupation

NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4314-4317 XOCER10   1970 Occupational Education Score For Sib-
                    Respondent's Preferred Job 10 Years From Now
                    (Q19, 45)    (added 9/00)

                 0008-0995      1970 Education Score                   843  755

                 9997           Don't know                               2    4
                 9998           Inappropriate--would not like to be    166  302
                                working ten years form now or doesn't
                                know if wants to be working ten years
                                from now (XJB10YR = 2, 3 or 7)
                 9999           Not ascertained, nonsample             208  158
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4318-4321 XOCIR10   1970 Occupational Income Score For Sib-
                    Respondent's Preferred Job 10 Years From Now
                    (Q19, 45)    (added 9/00)

                 0002-0877      1970 Income Score                      843  755

                 9997           Don't know                               2    4
                 9998           Inappropriate--would not like to be    166  302
                                working ten years form now or doesn't
                                know if wants to be working ten years
                                from now (XJB10YR = 2, 3 or 7)
                 9999           Not ascertained, nonsample             208  158
                                or military occupation


NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

4322-4325 XOCECRS   1970 Occupational Education Score of Sib-respondent's
                    Current Spouse's Current or Last Job (Q68)
                    (added 9/00)

                 0017-0995      1970 Education Score                   525  928

                 9997           Don't know                               0    1
                 9998           Inappropriate-- not  currently         513  149
                                married (XMRSTAT = 1, 3-5),
                                spouse never worked (XINCRS =
                                991) or answered "no" to Q67a of
                                1977 Questionnaire
                 9999           Not ascertained, nonsample             181  141
                                or military occupation

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4326-4329 XOCICRS   1970 Occupational Income Score of Sib-respondent's
                    Current Spouse's Current or Last Job (Q68)
                    (added 9/00)

                 0003-0845      1970 Income Score                      525  928

                 9997           Don't know                               0    1
                 9998           Inappropriate-- not  currently         513  149
                                married (XMRSTAT = 1, 3-5),
                                spouse never worked (XINCRS =
                                991) or answered "no" to Q67a of
                                1977 Questionnaire
                 9999           Not ascertained, nonsample             181  141
                                or military occupation


NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.


4330-4333 OCEXYR    1970 Occupational Education score, job to be held
                    after graduation. (1957Q) Q4 (added 9/00)

                 0008-0862      1970 Education Score                   808 1118

                 9999           INAP, refused, not ascertained        4184 4207

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4334-4337 OCIXYR    1970 Occupational Income score, job to be held
                    after graduation. (1957Q) Q4 (added 9/00)

                 0000-0755      1970 Income Score                      808 1118

                 9999           INAP, refused, not ascertained        4184 4207


NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.


4338-4341 SPOCEASP  1970 Occupational Education score for 1957 aspiration.
                    (1957Q) Q9b (added 9/00)

                 0025-0987      1970 Education Score                  3236 4223

                 9999           INAP, refused, not ascertained        1756 1102

NOTE:   There is an implied decimal point one place to the left of
        the right most digit.

NOTE:   The 1970-basis occupational education score is the
        percentage of persons in the 1970 Census in an occupation/
        industry/class-of-worker category who completed
        one year of college or more.  See Appendix P--
        COR 638 and COR 713 for details, and a recommended
        transformation of this variable is described in MEMO 133.

4342-4345 SPOCIASP  1970 Occupational Income score for 1957 aspiration.
                    (1957Q) Q9b (added 9/00)

                 0002-0877      1970 Income Score                     3236 4223

                 9999           INAP, refused, not ascertained        1756 1102


NOTE:  There is an implied decimal point one place to the left of
       the right most digit.

NOTE:  The 1970-basis occupational income score is the
       percentage of persons in the 1970 Census in an occupation/
       industry/class-of-worker category whose income was
       at least $10,000 in 1969.  See Appendix P--
       COR 638 and COR 713 for details, and a recommended
       transformation of this variable is described in MEMO 133.

 
Data last updated