Does a college degree raise income mobility or just reflect selection?
Core argument: Analysis of the National Longitudinal Survey of Youth 1979 finds that once selection is accounted for, intergenerational income mobility among college graduates is similar to that of non-graduates.
Analysis of the National Longitudinal Survey of Youth 1979 reveals that intergenerational income mobility among college graduates, once adjusted for selection processes, is similar to that of non-graduates. This suggests that merely increasing the number of college graduates may not enhance mobility in the U.S. The study highlights that high mobility among degree holders often reflects selectivity based on attributes like ability and motivation, particularly from low and moderate-income families. While conditional mobility is higher for graduates, controlled mobility shows little difference between graduates and non-graduates. Selective colleges show a large but statistically insignificant equalizing effect, whereas nonselective colleges do not. The findings indicate that the perceived "college premium" in mobility is largely due to selection rather than equalization, with family income strongly correlating with characteristics that perpetuate inequality, such as race, cognitive ability, and educational expectations.





