/*
# Markdoc demo
Use the automobile data set.  Demonstrate the **jackknife** command.
*/
sysuse auto

regress price mpg weight foreign
jackknife coef=_b[mpg]: regress price mpg weight foreign
/*
Produce the same results using **postfile**.
*/
postfile coeffs b se using "coeffs.dta", replace

forvalues i = 1/74 {
	quietly regress price mpg weight foreign if _n~=`i'
	local b _b[mpg]
	local se _se[mpg]
	post coeffs (`b') (`se')
	}
	
postclose coeffs

use "coeffs.dta", clear
summarize b se
ci se