In this paper we seek to provide a resolution of the Edgeworth paradox for the case where firms are free to supply less than the quantity demanded, the residual demand function is {\it manipulable} (a generalization of the proportional one) and prices vary over a grid. We demonstrate that a...

We consider a Bertrand duopoly model with increasing returns to scale where one of the firms have a cost advantage and prices vary over a grid. We find that typically more than one equilibria exist. However, there are only two perfect equilibria. Moreover, as the size of the grid becomes small,...

We examine group-lending under sequential financing. In a model with moral hazard, social capital and endogenous group formation, we identify conditions such that sequential financing with joint liability leads to positive assortative matching between borrowers with and without social capital...

This paper examines a marriage market with externality. We first develop an appropriate notion of stability for this market, called E-stability. We provide an example to show that an E-stable outcome need not exist. We then derive conditions under which an E-stable outcome exists.

For a large class of demand and cost functions, we characterize the limit equilibrium set under Bertrand oligopoly when entry is exogenous. Unless average cost is constant, we find that the folk theorem of perfect competition necessarily fails. We also relate our results to those in Novshek and...

We examine a model of price competition where the firms simultaneously decide on both price and quantity, and are free to supply less than the quantity demanded. We demonstrate that if the tie-breaking rule is `non-manipulable', then, for a large class of rationing rules, there is a unique...

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...