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mixtape/Do/card.do

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* OLS estimate of schooling (educ) on log wages
reg lwage educ exper black south married smsa
* 2SLS estimate of schooling (educ) on log wages using "college in the county" as an instrument for schooling
ivregress 2sls lwage (educ=nearc4) exper black south married smsa, first
* First stage regression of schooling (educ) on all covariates and the college and the county variable
reg educ nearc4 exper black south married smsa
* F test on the excludability of college in the county from the first stage regression.
test nearc4