The Benefits to Taxpayers from Increases in Students - RAND ...

Social Program Participation and Costs 103
Table C.4b
Estimated Two-Part Model of 2002 SSI Income
OLS - Income Received (square root)
Women
Men
Under 65 Over 64 Under 65 Over 64
Intercept 50.373** –225.989 54.661** 663.241
Education level
Less than high school
graduate
–8.084 588.206 –3.095 –408.058
Some college –35.041 282.255 –57.511 –497.993
Bachelor’s degree or more –10.853 728.839 47.046 –1076.274
Age
Age 0.615 7.238 0.420 –14.173
Age squared –0.007 –0.049 –0.003 0.079
Age–less than high school
graduate
0.718 –15.785 0.356 9.019
Age–some college 1.395 –6.525 2.941 13.755
Age–bachelor’s degree or
more
Age squared–less than
high school graduate
–1.078 –18.354 –2.890 26.134
–0.011 0.106 –0.006 –0.049
Age squared–some college –0.015 0.037 –0.036 –0.094
Age squared–bachelor’s
degree or more
0.021 0.116 0.033 –0.158
Race/ethnicity
Asian –3.835 17.298** 1.190 31.636**
Black –2.118 1.792 –1.527 –3.764
Hispanic 1.438 2.942 –2.193 5.874
Native American 11.138* –22.053** 5.213 –13.803
Immigrant –1.279 9.889** –0.490 –5.013
N 687 316 452 138
R squared 5% 14% 3% 24%
NOTES: One and two asterisks indicate significance at the 0.05 and 0.01 levels, respectively.
Education effects (main and interacted) are jointly significant for under-65 women at the 0.005
level. The intercept is high school graduate, white, U.S.-born.