“Employment Trends by Age in the United States: Why Are Older Workers Different?” by Sudipto Banerjee and David Blau (WP 2013-285, June 2013, .pdf format, 53p.). Note: Links to the abstract and full-text can be found at:
www.mrrc.isr.umich.edu/publications/index_abstract.cfm?ptid=1&pid=898