A life cycle model of labor supply predicts the presence of an
unobserved individual effect (log marginal utility of wealth) in the labor
supply equation which is correlated with the observed explanatory variables,
leading to an omitted variables bias in…

The central claim of a rapidly growing literature in international relations is that members
of pairs of democratic states are much less likely to engage each other in war or in serious
disputes short of war than are members of…

I use a sample of over fourteen thousand full-time jobs held by workers
in the National Longitudinal Survey of Youth (NLSY) to examine mobility
patterns and to evaluate theories of inter-firm worker mobility. The roles
of both heterogeneity and state…