For Bertrand duopoly with linear costs, we establish via a single counterexample that: (i) A new monotone transformation of the firms' profit functions may lead to the supermodularity of transformed profits when the standard log and identity transformations both fail, and (ii) Topkis's notion of...

We consider the issue of endogenous timing, according to the extended game of Hamilton-Sluytsky (1990), for the classical Coumot and Bertrand duopolies. We provide minimal sufficient conditions, directly on the primitives of each model (i.e. the demand and cost functions), yielding the...

When consumers differ in their attitude towards risk, price competi- tion between products of uncertain characteristics may be analyzed using address-models of product differentiation. These models provide a natural set-up for analyzing industries in which products of different reliability may...

In many european countries, public opinion seems to be worried about the effect of lower-wage country competition. In newspapers' articles, as well as in policy debates, the terms "social dumpingll becomes more and more popular. Trade unions, worried by the effect of what they call "unfair...

It has long been recognized that the pleasure of consuming a good may be affected by the consumption choice of other consumers. At least two types of motivations may explain such a behavior. In some cases social pressures may lead to conformity; while in some other cases individuals may feel the...

In this paper we study a vertically differentiated duopoly market with a profit maximizing firm (private firm) and a total surplus maximizing firm (public firm). The technological conditions are assumed identical for both firms and are described by unit costs which are constant with respect to...

In a context of vertical product differentiation we analyze the effect of delegation on quality. We consider a duopoly where firms can delegate to an agent the quality determining activities. The quality level is determined by the level of a random fixed cost. The actual realization of this...

This paper is an attempt to develop a unified approach to endogenous heterogeneity by constructing general class of two-player symmetric games that always possess only asymmetric pure-strategy Nash equilibria. These classes of games are characterized in some abstract sense by two general...

This paper considers the well-known Levhari-Mirman model of resource extraction, and investigates the effects of the information structure of the dynamic game - open-loop, Markovian or history-dependent - on the equilibrium consumption path and the overall utility of the agents. The open-loop...