By 1989, the Michigan Panel Study on Income Dynamics (PSID) had experienced approximately 50 percent sample loss from its initial 1968 membership due to cumulative attrition. We study the effect of this attrition on the unconditional distributions of several socioeconomic variables and on the...

Many papers have investigated how personal characteristics and environmental variables affect welfare durations of unmarried mothers. This paper estimates proportional hazard models for welfare durations that allow for either fixed state or fixed labor market area effects. Conditioning on...