Corporate Social Responsibility and Firms Ability to Collude

We examine a duopoly with polluting production where firms adopt a form of corporate social responsibility (CSR) to define their objective functions. Our analysis focusses on the bearings of CSR on collusion over an infinite horizon, sustained by either grim trigger strategies or optimal punishments. Our results suggest that assigning a weight to consumer surplus has a pro-competitive e¤ect under both full and partial collusion. Conversely, a higher impact of productivity on pollution has an anti-competitive effect under partial collusion, while exerting no effect under full collusion. Under partial collusion, the analysis of the isoquant map of the cartel reveals that complementarity arises between the two weights.

The Environmental Impact of Bertrand and Cournot Duopolies. A Cautionary Note

We compare a Bertrand with a Cournot duopoly in a setting where production is polluting and exploits natural resources, and firms bear convex production costs. We adopt Dastidar's (1995) approach, yielding a continuum of Bertrand-Nash equilibria ranging above marginal cost pricing also, to show that softening price competition may lead to a lower output production in a Bertrand rather than a Cournot industry. The market structure bringing about the lowest output determines the highest social welfare, given the fact that the negative environmental effects of production more than offset the gain in consumer surplus.

The Dynamics of Disease in a Regulated Vertically Differentiated Health System

We build up a differential game to investigate the interplay between the quality of health care and the presence of an evolving disease in a duopoly where patients are heterogeneous along the income dimension. We prove unicity, stability and perfection of the open-loop Nash solution. Moreover, we identify the admissible parameter region wherein price regulation achieves the twofold objectives of ensuring cares to all patients and eradicating the disease.

Vertical Differentiation in a Cournot Industry: The Porter Hypothesis and Beyond

We modify the vertically differentiated duopoly model by André et al. (2009) replacing Bertrand with Cournot behaviour to show that firms may spontaneously adopt a green technology even in the complete absence of any form of regulation.

On the Stability of Mixed Oligopoly Equilibria with CSR Firms

This paper examines the stability conditions of the equilibria in a market where profit-maximising and CSR firms coexist in the presence of an environmental externality. An equilibrium in mixed duopoly is stable for low impact of productivity on pollution and high CSR sensitivity to consumer surplus. In addition, a mixed oligopoly equilibrium is stable if the number of CSR is sufficiently low.

Low-Quality Leadership in a Vertically Differentiated Duopoly with Cournot Competition

We model a vertically differentiated duopoly with quantity-setting firms as an extended game in which firms noncooperatively choose the timing of moves at the quality stage, to show that at the subgame perfect equilibrium sequential play obtains, with the low-quality firm taking the leader's role.