This paper is a first step toward closing the analytical gap in the extensive literature on the results of interactions between public and private R&D expenditures, and their joint effects on the economy. A survey focusing on econometric studies in this area reveals a plethora of sometimes...

This paper studies a game of strategic experimentation with two-armed bandits whose risky arm might yield a payoff only after some exponentially distributed random time. Because of free-riding, there is an inefficiently low level of experimentation in any equilibrium where the players use...

In a collective-action game a player`s payoff is the sum of (i) a private component that depends only on that player`s action, and (ii) a public component, common to all players and dependent upon all actions. A classic application is the private provision of a public good. Play evolves:...

The volunteer`s dilemma is an asymmetric n-player binary-action game in which a public good is provided if and only if at least one player volunteers, and consequently bears some private cost. So long as the value generated for every player exceeds this private cost there are n pure-strategy...

The purpose of this paper is to reflect, from an economist`s point of view, on the methodological issues raised by the study of social capital. This term has been used in many different ways to cover a broad range of phenomena (Durlauf & Fafchamps 2002). Perhaps it is best seen as a way of...