The Herfindahl–Hirschman Index is one of the most commonly used indicators to detect
anticompetitive behaviour in industries. In fact, an increase in the value of the index is …

The authors of this book spent several decades of performing research in different areas of
mathematical economics and especially in game theory until the mid-1990s when they met …

I present a generalized form of firms' objective function. Besides classical own profit
maximization, I add two distinct concerns: consumer surplus and competitors' profits. This …

In this paper we extend and generalize the interesting duopoly model proposed by Tönu
Puu (1991). An n-firm oligopoly is considered without product differentiation, when the price …

Most models of economic theory assume that firms maximize profits. However, in the real
world, not all firms adopt profit maximizing behavior. Therefore, this paper examines a …

The effects of partially cooperating firms are examined in N-firm oligopolies. The Herfindahl-
Hirschmann Index is assumed to detect the violation of the antitrust regulation by the firms …

Cournot oligopolies are examined with two kinds of output adjustment costs, which model
the use of contingent work force and additional investments. The best responses of the firms …

Empirical evidence, and theoretical results have shown that, in an industry, higher
concentration index indicates higher price‐cost margin. In order to detect collusive …

This paper examines a two-stage Cournot duopoly model in which two firms coexist with
each other. In the first stage, each firm simultaneously and independently decides the …

In the oligopoly literature, the introduction of modified cost functions has added reality into
the classical analysis. In particular, some recent contributions analyzed oligopoly dynamics …