clear
capture log close
log using m2.log, replace

/***********************************************************
M2.DO is a STATA do-file used for the take home exam.

Located at my course web-site (http://www.uncg.edu/bae/people/rosenbaum/Eco643/main.html) 
is a space-delimited file (card.raw) containing individual-level data 
of males aged 24-34 from the U.S. in 1976 with an hourly wage of $1 
per hour or greater.  The variables are as follows.  Note that I 
have included a stata do file (m2.do) to help you read in this data.

  1. id                       person identifier
  2. nearc2                   =1 if near 2 yr college, 1966
  3. nearc4                   =1 if near 4 yr college, 1966
  4. educ                     years of schooling, 1976
  5. age                      in years
  6. fatheduc                 father's schooling
  7. motheduc                 mother's schooling
  8. weight                   NLS sampling weight, 1976
  9. momdad14                 =1 if live with mom, dad at age 14
 10. sinmom14                 =1 if with single mom at age 14
 11. step14                   =1 if with step parent at age 14
 12. reg661                   =1 for region 1, 1966
 13. reg662                   =1 for region 2, 1966
 14. reg663                   =1 for region 3, 1966
 15. reg664                   =1 for region 4, 1966
 16. reg665                   =1 for region 5, 1966
 17. reg666                   =1 for region 6, 1966
 18. reg667                   =1 for region 7, 1966
 19. reg668                   =1 for region 8, 1966
 20. reg669                   =1 for region 9, 1966
 21. south66                  =1 if in south in 1966
 22. black                    =1 if black
 23. smsa                     =1 in in SMSA, 1976
 24. south                    =1 if in south, 1976
 25. smsa66                   =1 if in SMSA, 1966
 26. wage                     hourly wage in cents, 1976
 27. enroll                   =1 if enrolled in school, 1976
 28. KWW                      knowledge world of work score
 29. IQ                       IQ score
 30. married                  =1 if married, 1976
 31. libcrd14                 =1 if lib. card in home at age 14
 32. exper                    age - educ - 6
 33. lwage                    log(wage)
 34. expersq                  exper^2

- written by Dan Rosenbaum, 2006
***********************************************************/

/***********************************************************
I start by inputting the data using an INFILE statement,
since the data is space-delimited rather than tab-delimited.
I also calculate summary statistics for the sample.
***********************************************************/

infile id nearc2 nearc4 educ age fatheduc motheduc weight momdad14 sinmom14 step14 ///
	reg661 reg662 reg663 reg664 reg665 reg666 reg667 reg668 reg669 south66 black ///
	smsa south smsa66 wage enroll kww iq married libcrd14 exper lwage expersq ///
	using card

sum