This paper introduces two new concepts in evolutionary game theory; Nash equilibrium with Group Selection (NEGS) and Evolutionary Stable Strategy with Group Selection (ESSGS). These concepts generalize Maynard Smith and Price (1973) to settings with arbitrary matching rules, in particular they...

See Birmingham Discussion Paper 05-19 (December 2005) for current version.

We study extinction in a commons problem in which agents have access to capital markets. When the commons grows more quickly than the interest rate, multiple equilibria are found for intermediate commons endowments. In one of these, welfare decreases as the resource becomes more abundant, a...

We study option management by committee. Analysis is illustrated by tenure decisions. Our innovations are two-fold: we treat the committee's problem as one of social choice, not of information aggregation; and we endogenise the outside option: rejecting a candidate at either the probationary or...

We study option management by committee. Analysis is illustrated by tenure decisions. Our innovations are two-fold: we treat the committee's problem as one of social choice, not information aggregation; and we endogenise the outside option: rejecting a candidate at either the probationary or...

The paper studies optimal redistributive taxation when the government cannot commit the future policy. The framework used is one in which individuals can revise their consumption-savings decisions slightly more often than the government can change tax policy.

See Birmingham Discussion Paper 05-05R (January 2006) for current version.

We explore a dynamic commons problem and assess the welfare consequences of access to capital markets. The commons has a high intrinsic rate of return but its fruits cannot be secured by individual agents. Capital market access allows resources to be held securely and intertemporally...

We study extinction in a commons problem in which agents have access to capital markets. When the commons grows more quickly than the interest rate, multiple equilibria are found for intermediate commons endowments. In one of these, welfare decreases as the resource becomes more abundant, a `re-...

We study dominant strategy implementation in a variant of the canonical public good provision model, as proposed by Borgers and Postl (2009). In this set up, we fully characterize the set of budget-balanced dominant strategy deterministric mechanisms, which are simple threshold rules. For...