measures as well as on a firm's profitability. We consider rivalry, egoism and altruism as extreme forms within the continuum …

dilemma situations. As a result, they are often treated alike. In this paper we argue that the degree of rivalry is the … fundamental difference between the two games. We show that rivalry implies that both games cannot be represented by the same game …-pants clearly perceive the differences in rivalry. Aggregate behavior in both games starts relatively close to Pareto efficiency and …