Collusion sustainability depends on firms' aptitude to impose sufficiently severe punishments in case of deviation from the collusive rule. We characterize the ability of oligopolistic firms to implement a collusive strategy when their ability to punish deviations over one or several periods...

We characterize sequential (preemption) and simultaneous (coordination) equilibria, as well as joint-value maximizing (cooperation) solutions, in a model of investment timing allowing for externalities in both flow pro...ts and investment costs. For two ex-ante symmetric ...rms, either...

In a real option model, we show that the standard analysis of vertical relationships transposes directly to investment timing. Thus, when a firm undertaking a project requires an outside supplier (e.g., an equipment manufacturer) to provide it with a discrete input to serve a growing but...

We consider an optimal portfolio diversification model in which a large shareholder can influence shares return by monitoring efficiently managers. Less diversification decreases insurance but increases the stake in the ownership and then enhances efficiency of management monitoring. We analyze...

This paper considers a model of two interconnected networks with different qualities. There are call externalities in the sense that consumers value calls they send and receive. Networks compete in two part tariffs. We show that call externalities create private incentives for each competitor to...

Cet article tente d'expliquer l'impact ambigu de la loi Raffarin sur les relations entre producteurs et distributeurs, en montrant qu'elle exerce deux effets opposés sur le partage du profit entre les secteurs amont et aval. Nous proposons un modèle permettant d'appréhender l'influence d'une...

We discuss Shen and Starr(2002) results and show that the bid-ask spread of a monopolistic market-marker doesn't depend on his inventory when he posts ''martingale prices '' in an inventory model with random volumes and an unknown direction of trade.

This note further characterizes the tacit collusion equilibria in the investment timing game of Boyer, Lasserre and Moreaux [1]. Tacit collusion equilibria may or may not exist, and when they do may involve either finite time investments (type 1) or infinite delay (type 2). The relationship...

Patent pools are cooperative agreements between several patent owners to bundle the sale of their respective licenses. In this paper we analyze their consequences on the speed of the innovation process. We adopt an ex ante perspective and study the impact of possible pool formation on the...

We use the French portion of the 2002 Community Innovation Survey to test how spillovers a®ect the likelihood that ¯rms cooperate in R&D. Unlike most existing empirical studies, our results clearly support well-established theoretical predictions of the industrial organization literature. We...