This article aims to examine how the size of file-sharing communities affects their functioning and performance (i.e. their capacity to share content). Olson (1965) argued that small communities are more able to provide collective goods. Using an original database on BitTorrent file-sharing...

In a circular matching model, firms rank their applicants and pick the best suited one. Job creation appears to lower the average output. As firms do not internalize this effect, jobs are too many in the laissez-faire equilibrium under the Hosios condition. Due to similar externalities firms'...

This paper reexamines the issue of the division of the labor force between the two sub-markets (formal and informal) of a developing economy. The formal sector is represented by a matching model with vertically differentiated workers. Assuming that firms hire their best applicants, we state that...

In this article, we explore the issue of whether the financial conditions into which a firm is born have an effect on its survival chances. After both correction of the omitted variables bias and introduction of time varying covariates, we show two distinctive effects of banking debt on the...

We study the relationship between the distribution of individuals' attributes over the population and the extent of risk sharing in a risky environment. We consider a society where individuals differing with respect to risk or their degree of risk aversion form risk-sharing coalitions in the...

This paper provides a simple formula describing all Nash equilibria in symmetric monotone singleton congestion games. Our approach also yields a new and short proof establishing the existence of a Nash equilibrium in this kind of congestion games without invoking the potential function or the...

In this note we study the existence of Nash equilibria in nonsymmetric finite congestion games, complementing the results obtained by Milchtaich on monotone-decreasing congestion games. More specifically, we examine the case of two resources and we propose a simple method describing all Nash...

We define a new class of games, which we qualify as congestion games with exact partition. These games constitute a subfamily of singleton congestion games for which the players are restricted to choose only one strategy, but they each possess their own utility function. The aim of this paper is...

This paper studies the existence of a fiscal Nash equilibrium in a multi-country model of trade where the relative prices are the channels of transmission of scal policies between countries. We stipulate the necessary conditions on goods, consumptions and trade that allow for the existence of a...

In this article, we use a stylized model of the labor market to investigate the effects of three alternative and well-known bargaining solutions. We apply the Nash, the Egalitarian and the Kalai-Smorodinsky bargaining solutions in the small firm’s matching model of unemployment. We first show...