Covers topics such as: models of economic exchange and production, uncertainty, optimality, public goods, social improvement criteria, life and death choices, majority voting, Arrow's theorem, and theories of implementation and mechanism design. This book aims to make value judgments about...

The Concerns of Welfare Economics -- The Concerns of Social Choice Theory -- Practical Concerns of Welfare Economics and Social Choice Theory -- 1 Preferences and Utility -- Fundamental Assumptions -- Best Alternatives and Utility Functions -- The Formal Model of Preferences -- to Social...

We characterize full implementation of social choice sets in mixedstrategy Bayesian equilibrium. Our results concern both exact and virtual mixed implementation. For exact implementation, we identify a strengthening of Bayesian monotonicity, which we refer to as mixed Bayesian monotonicity. It...

We assess the strength of the different conditions identified in the literature of robust mechanism design. We focus on three conditions: ex post incentive compatibility, robust monotonicity, and robust measurability. Ex post incentive compatibility has been shown to be necessary for any concept...

Implementation in iteratively undominated strategies relies on permissive conditions. However, for the sufficiency results available, authors have relied on assumptions that amount to quasilinear preferences on a numeraire. We uncover a new necessary condition that implies that such assumptions...