This study of demand analysis links economic theory to empirical analysis. It demonstrates how theory can be used to specify equation systems suitable for empirical analysis, and discusses demand systems estimation using both per capita time series and household budget data

Comparisons of individual life expectancies over time and across demographic groups provide information for individuals making retirement decisions and for policy makers. For couples, analogous measures are the expected years both spouses will be alive (joint life expectancy) and the expected...

We study the impact of a medical breakthrough (HAART) on domestic violence and illicit drug use among low-income women infected with HIV. To identify causal effects, we assume that variation in women's immune system health when HAART was introduced affected how strongly their experience of...