st: re: generate with varying number of previous observations

[Kit Baum <baum@bc.edu>]

sysuse auto,clear
forv i=2/8 {
	qui g diff`i' = price - price[`i'] in 1/`=`i'-1'
}
l price diff*


Kit Baum, Boston College Economics and DIW Berlin
http://ideas.repec.org/e/pba1.html
An Introduction to Modern Econometrics Using Stata:
http://www.stata-press.com/books/imeus.html


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