We examine a simple model of collusion under a single-object secondprice auction. Under the appropriate parameter conditions, in particular as long as collusion is neither too easy, nor too difficult, we find that the optimal policy involves both an effective ceiling, as well as a reserve price...

This paper focuses on the dynamic aspects of group-lending, in particular sequential financing and contingent renewal. We examine the encacy of these two schemes in harnessing social capital. We find that, for the appropriate parameter configurations, there is homogenous group-formation so that...

We develop a simple model of group-lendingbased on peer monitoring and moral hazard. We find that, in the absence of sequential financing or lender monitoring, group-lending schemes may involve under-monitoring with the borrowers investing in undesirable projects. Moreover, under certain...

We examine alliances between asymmetric countries. We find that the results depend on the nature of the equilibrium. If the equilibrium is an interior one then, with an increase in asymmetry, the level of the alliance-wide defense good decreases and the divergence between the first best and the...

Consider a Bertrand-Edgeworth duopoly with linear cost functions. If the firms produce to stock then no Nash equilibrium in pure strategies exists. If, however, the firms produce to order then all subgame perfect Nash equilibria involve the firms charging a price equal to marginal cost.

This paper studies a non-cooperative bargaining problem with one buyer and many sellers, focussing on the tension between the complementarity intrinsic to such a setup and efficiency. We address this problem in a very general setup with a technology that allows for variable degrees of...

We identify a new route through which patent protection may affect R&D incentives, the tournament effect. It may decrease R\&D incentives, in which case patent protection may either adversely affect the level of R&D, or may discourage licensing. In either case welfare may fall.

We examine if the folk theorem of perfect competition holds under Bertrand competition (when firms supply all demand), both when entry is exogenous, as well as when it is free. Inter alia, we also characterize the limit equilibrium sets.

This paper explores the relationship between financial intermediation and employment. We explain why some economies have low financial intermediation even when financial intermediation is safe. Moreover, we seek to explain why these economies tend to be poor and vulnerable, and also have large...

In this paper we build a theory of joint venture formation and instability based on synergy and monitoring. We find that monitoring problems may prevent the joint venture from forming at all. Moreover, joint venture formation usually involves over-monitoring, and ex post could involve cheating...