This paper considers welfare effects of entry when the incumbent firmbehaves like a Stackelberg leader in the product market. In contrast to previous work(Klemperer, 1988, Journal of Industrial Economics), we show that entry may alwaysincrease welfare. Using general demand function, we show the...

We suggest an alternative way of analyzing the canonical Bergstrom-Blume-Varian model of non-cooperative voluntary contributions to a public goodthat avoids the proliferation of dimensions as the number of players is in-creased. We exploit this approach to analyze models in which the...

We present a rigorous, yet elementary, demonstration of the existence of a uniqueLindahl equilibrium under the assumptions that characterize the standard n-player public goodmodel. Indeed, our approach, which exploits the aggregative structure of the public goodmodel, lends itself to a...

We examine whether an economy can have a bad (small or no formal sector, hightaxes) as well as a good (small or no informal sector, low taxes) equilibrium...

We study aggregative games in which players’ strategy sets areconvex intervals of the real line and (not necessarily differentiable)payoffs depend only on a player’s own strategy and the sum of allplayers’ strategies. We give sufficient conditions on each player’s payofffunction to...

This paper re-considers the comparison of Bertrand and Cournot equilibria in a differentiatedduopoly with linear demand and cost functions. It focuses on the case of substitutegoods, and allows for cost asymmetries between firms. The main finding is that, when thedegree of cost asymmetry is...

This paper examines the validity of alternative assumptions aboutpublic enterprise strategies in the presence of both domestic and internationalcompetition. It extends the quantity-setting game to apreplay stage and endogenizes the firms’ order of moves to show thati) Cournot competition is...

...In this paper, we tackle all these difficulties by conducting a full geomatrical analysis of the comparative statics of general models...

We develop and analyse a simple general equilibrium model withcapital market imperfections We find that the impact of monetarypolicy on real economic activity depends on the initial distributionof wealth in the economy. Changes in the opportunity cost of fundsaffect not only the choice of...

When the equilibrium of the economy depends on the coordinationof actions of a large number of agents the level of optimism can be-come a deciding factor. We propose an equilibrium selection processwhere the level of optimism is endogenously determined...