We introduce a no-risky-arbitrage price (NRAP) condition for asset market models allowing both unbounded short sales and externalities such as trading volume. We then demonstrate that the NRAP condition is sufficient for the existence of competitive equilibrium in the presence of externalities....

We show that, in competition between a developed country and a developing country over standards and taxes, the developing country may have a 'second mover advantage.' A key feature of standards is that, unlike public goods as usually defined, all firms do not unanimously prefer higher standard...

We introduce a model of a local public goods economy with a continuum of agents and jurisdictions with finite, but unbounded populations, where the set of possible projects for each jurisdiction/club is unrestricted in size. Under boundedness of per capita payoffs, which simply ensures that...

We present a dynamic model of club formation in a society of identical people. Coalitions consisting of members of the same club can form for one period and coalition members can jointly deviate. The dynamic process is described by a Markov chain defined by myopic optimization on the part of...

We consider a general equilibrium local public goods economy in which agents have two distinguishing characteristics. The first is 'crowding type,' which is publicly observable and provides direct costs or benefits to the jurisdiction (coalition or firm) the agent joins. The second is taste...

We explore the potential for correlated equilibrium to capture conformity to norms and the coordination of behavior within social groups. Given a partition of players into social groups we propose three properties one may expect of a correlated equilibrium: within-group anonymity, group...

In a seminal paper relating economic and game theoretic structures, Shapley and Shubik (1969) demonstrate that a game is a market game -- that is, a game derived from a finite-dimensional private goods exchange economy where all participants have continuous, concave utility functions. In this...

We explore the potential for correlated equilibrium to capture conformity to norms and the coordination of behavior within social groups. Given a partition of players into social groups we propose properties that one may expect of a correlated equilibrium: within-group anonymity, group...

Is conformity amongst similar individuals consistent with self-interested behavior? We consider a model of incomplete information in which each player receives a signal, interpreted as an allocation to a role, and can make his action choice conditional on his role. Our main result demonstrates...

Treating games of incomplete information with countable sets of actions and types and finite but large player sets we demonstrate that for every mixed strategy profile there is a pure strategy profile that is 'epsilon-equivalent'. Our framework introduces and exploits a distinction between...