We use 6-digit bilateral trade data to document the effect of WTO/GATT membership on the extensive and intensive product margins of trade. We construct gravity equations for the two product margins where the specifications of these gravity equations are motivated by the model of Eaton and Kortum...

We use 6-digit bilateral trade data to document the effect of WTO/GATT membership on the extensive and intensive product margins of trade.We construct gravity equations for the two product margins motivated by Chaney (2008). The empirical results show that standard gravity variables provide good...

Consider a family of zero-sum games indexed by a parameter that determines each player's payoff function and feasible strategies. Our first main result characterizes continuity assumptions on the payoffs and the constraint correspondence such that the equilibrium value and strategies depend...

We prove the existence of a greatest and a least interim Bayesian Nash equilibrium for supermodular games of incomplete information. There are two main differences from the earlier proofs in Vives (1990) and Milgrom and Roberts (1990): we use the interim formulation of a Bayesian game, in which...

This is a chapter for the forthcoming Handbook of Rational and Social Choice, Paul Anand, Prasanta Pattanaik, and Clemens Puppe, eds., Oxford University Press, 2008. We review classic normative expected utility theory. Our goal is to frame the subsequent chapters (which consider more modern...