We study cooperation in economies of indefinite duration. Participants faced a sequence of prisoner's dilemmas with anonymous opponents. We identify and characterize the strategies employed at the individual level. We report that (i) grim trigger does not describe well individual play and there...

This paper studies contagious equilibrium in infinitely repeated matching games. The innovation is to identify a key statistic of contagious punishment that, used together with a recursive formulation, generates tractable closed-form expressions for continuation payoffs, off equilibrium. This...

We study an economy in which exchange occurs pairwise, there is no commitment, and anonymous agents choose between random monetary trade or deterministic credit trade. To accomplish the latter, agents can exploit a costly technology that allows limited record-keeping and enforcement. An...

We study a decentralized trading model as in Peters (1984a), where heterogeneous market participants face a trade-off between price and trade probability. We present a novel proof of existence of a unique demand vector in Nash equilibrium, based on a recursive approach that exploits the...

In an experiment, a group of strangers was randomly divided in pairs to play a prisoners' dilemma; this process was indefinitely repeated. Cooperation did not increase when subjects could send public messages amounting to binding promises of future play

We introduce banks in a model of money and capital with trading frictions. Banks offer demand deposit contracts and hold primary assets to maximize depositors' utility. If banks' operating costs are small, banks reallocate liquidity eliminating idle balances and improving the allocation. At...

We endogenize circulation of currencies and price formation in a decentralized monetary trading environment with two countries and two currencies. In equilibrium sellers of homogenous goods may post prices in the national or also in the foreign currency, given buyers' unobservable valuations. We...

One of the main challenges for monetary economics is to explain the use of assets that are dominated in rate-of-return as media of exchange.We use experimental methods to study howa fiat money might come to be used in transactions when an identically marketable, dividend-bearing asset, a consol,...

An inter-governmental body is encouraging the replacement of currency with the objective of discouraging illegal economic activities. This policy is analyzed in a search-theoretic model where individuals choose legal or illegal production, settle trades via monetary or costly intermediated...

We endogenize the trade mechanism in a search economy with many homogenous sellers and many heterogenous buyers of unobservable type. We study how heterogeneity and the traders' continuation values - which are endogenous - influence the sellers' choice of trade mechanism. Sellers trade off the...