ID number
Duration until drop out of college or until end of observation period
A status variable, indicating drop out (1) or a censored observation (0)
Respondent's sex (0 = male, 1 = female)
Average high school grades, from 1 (mostly As) to 5
Part-time student (1; 0 otherwise)
Time elapsed between leaving high school and entering college
Time of marriage in 'calendar time' (with 1 indicating January 1980, 2 February
Time entering college in 'calendar time' (with 1 indicating January 1980, 2 Febr