* output results to log file
log using educ_earn.log, replace

* the data set is big so increase memory
set memory 2m

* read in data
* this is the data set from the intro to
* stata handout
use cps87

* construct ln weekly earnings
gen ln_weekly_earn=ln(weekly_earn)

* get descriptive information
sum weekly_earn ln_weekly_earn years_educ 

* run simple regression
reg ln_weekly_earn years_educ

* generate new variable for age squared
gen age2=age*age

* run regression controlling for
* educ and quadratic in age
reg ln_weekly_earn years_educ age age2

log close