*
*  Examples 15.1, 15.2
*  J. Wooldridge, Econometrics of Cross Section and Panel Data
*
*  Note: The sample data files include all required data transformations.
*        However, in many cases we show how these data transformations would
*        be created in RATS from the basic data, as this is something you will
*        need to know how to do in practice.
*
open data mroz.raw
data(format=free,org=columns) 1 753 inlf hours kidslt6 kidsge6 age educ wage repwage $
 hushrs husage huseduc huswage faminc mtr  motheduc fatheduc $
 unem city exper nwifeinc lwage expersq
*
set expersq = exper**2
*
* Linear probability model.
*
linreg inlf
# constant nwifeinc educ exper expersq age kidslt6 kidsge6
*
* Same with robust standard errors.
*
linreg(robusterrors) inlf
# constant nwifeinc educ exper expersq age kidslt6 kidsge6
*
* Example 15.2. Logit and probit
*
ddv(dist=logit) inlf
# constant nwifeinc educ exper expersq age kidslt6 kidsge6
ddv(dist=probit) inlf
# constant nwifeinc educ exper expersq age kidslt6 kidsge6
*
* Example 15.3
* Testing exogeneity of educ
*
linreg educ / reduc
# constant nwifeinc exper expersq age kidslt6 kidsge6 motheduc fatheduc huseduc
ddv(dist=probit) inlf
# constant nwifeinc educ exper expersq age kidslt6 kidsge6 reduc