We show that, in repeated common interest games without discounting, strong `perturbation implies efficiency' results require that the perturbations must include strategies which are `draconian' in the sense that they are prepared to punish to the maximum extent possible. Moreover, there is a...

In this paper we explore the practice of interdisciplinarity by examining how the UK research councils addressed the problem of the sustainable city during the 1990s. In developing their research programmes, the councils recognised that the problems of the sustainable city transcended...

We study a contract design setting in which the contracting parties cannot commit not to renegotiate previous contract agreements. In particular, we characterize the outcome functions that are implementable for an uninformed principal and an informed agent if, having observed the agent's...

Collective reputation and its associated free-rider problem have been invoked to justify state licensing of professions and to explain the incidence of franchising. We examine the conditions under which it is possible to create a Pareto-improving collective reputation among groups of...

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We analyze an R&D race in which, in each period, two firms each choose which of two research projects to invest in. Each observes the other's past choices and so strategic search is possible. Equilibrium is efficient if the projects differ only in their probability of being the "right'' project....