2009a, Dynamic oligopoly with partial cooperation and antitrust threshold, Submitted

Cournot oligopolies are the most frequently discussed economic models in the literature of mathematical economics. This research area was originated by Cournot (1838), and based on his pioneering work, many scientists have in-troduced and examined the different variants of the classical Cournot model. A comprehensive summary of earlier works is given in Okuguchi (1976) and their multiproduct extensions and some applications are presented in Okuguchi and Szidarovszky (1999). The most frequently discussed extensions are single-product models with product differentiation, multi-product oligopolies, labor-managed and rent-seeking games. The existence and uniqueness of the equilibria was the central research issue in the earlier years, and later the attention of sci-entists has been turned to the dynamic variants of these models. The asymptotic behavior of dynamic oligopolies became the main focus, first in the linear case and later nonlinearities have been introduced into the models. In most studies the total profits or the profits per labor units were the payoff functions of the firms, and no cooperation among the firms was assumed. In the noncooperativ