We propose a positive theory that is consistent with two important features of social security programs around the world: (1) they redistribute income from young to old and (2) they induce retirement. We construct a voting model that includes a "political campaign" or "debate" prior to the...

The paper surveys the economics literature on the competitive effects of vertical integration, assesses the relevance of the economics literature for several recent regulatory and antitrust cases, and defends a structured rule of reason approach to evaluating the competitive effects.

This paper first shows that when colleges' preferences are substitutable there does not exist any stable matching mechanism that makes truthful revelation of preferences a dominant strategy for every student. The paper introduces student types and captures colleges' preferences for affirmative...

Using four rounds of panel household data from the Kagera region of Tanzania, we show that transitory income shocks ¨C measured by the value of crop lost by farming households ¨C lead to significantly increased child labor. A one standard deviation increase in the shock is associated with a...