This paper proposes a formulation of coalitional payoff possibilities in games with externalities, based on the assumption that forming coalitions can exploit a ”first mover advantage”. We derive a characteristic function and show that when outside players play their best response...

We reconsider the problem of cartel stability in a linear symmetric Cournot oligopoly by assuming that every coalition of firms defecting from a cartel can choose its quantity before the remaining firms. We show that differently from Salant et al. (1983) the only profitable cartel includes all...

This paper revisits a particular norm of behaviour underlying the well known model of kinked demand. We show that under some standard regularity conditions this norm of behaviour sustains the efficient outcome in all symmetric games.

In a standard portfolio choice between a risky and a safe asset, we study the effect of imposing premia and penalties conditional on the realized return of the portfolio meeting a given threshold. We show that thresholds set at ”intermediate levels” have the effect to increase the optimal...

This paper revisits a particular behaviour for firms competing in imperfect competitive markets, underlying the well known model of kinked demand curve. We show that under some symmetry and regularity conditions, this asymmetric behaviour of firms sustains monopoly pricing, and possesses...

The aim of this note is to discuss previously unnoticed stability properties of majoritarian decision making. We study collective decisions problems that can be described in terms of symmetric games satisfying various regularity conditions. We show that restricting the objecting power to...

This paper presents a new cooperative equilibrium for strategic form games, denoted Conjectural Cooperative Equilibrium (CCE). This concept is based on the expectation that joint deviations from any strategy profile are followed by an optimal and noncooperative reaction of non deviators. We show...