no college = 1, 2 = 2-year college, 3 = 4-year college
= 1 if catholic high school graduate
average grade on 13 point scale with 1 = highest
gross 1991 family income (in $1000)
number of family members
= 1 if most educated parent graduated from college or had an advanced degree
= 1 if female
= 1 if black