*
* Dougherty, Introduction to Econometrics, 4th ed
* Example from Section 14.1
* Panel data
*
open data nlsy2000c.xls
data(format=xls,org=columns,missing=-999999.0) 1 42815 time id age sm sf siblings ethblack ethhisp asvab02 asvab03 asvab04 $
 height85 weight youngch exper expsq classpri classgov classse earnings hours tenure tenuresq uncolb union $
 regne regnc regw regs soonmarr single married s urban male asvabc agesq
*
set lgearn = log(earnings)
*
linreg(smpl=male.and.time==8) lgearn
# constant married soonmarr s asvabc tenure tenuresq exper expsq age agesq ethblack ethhisp regne regnc regw urban
linreg(smpl=male.and.time==8) lgearn
# constant single soonmarr s asvabc tenure tenuresq exper expsq age agesq ethblack ethhisp regne regnc regw urban