Bertrand argued that price would be driven down to marginal cost even with only two firms in the market. Chamberlin, by introducing product differentiation, argued that price will exceed marginal cost even when there are many firms. Thus product differentiation resolves the "Bertrand Paradox"....

In the Paris Bourse some stocks are traded on a spot basis, while others are traded on a monthly settlement basis. The latter are likely to be less subject to leverage and short sales constraints. We empirically analyze the consequences of this difference on the order flow and the return...

We consider an economy with a complete set of competitive markets for contingent claims. We examine how wealth inequality affects the equilibrium value of the equity premium and the risk-free rate. We forst show that welath inequality raises the equity premium if and only if the inverse of...

This paper aims at measuring the loss in the value of a firm due to the gamble for resurrection, in a standard contingent claims model. Just before a debt repayment is due, the equityholders of a levered firm can decide to shut the firm down or to keep it as an ongoing concern. We study how...