Devitt, Conor; Tol, Richard - Department of Economics, School of Business, Management … - 2012
We generalize Wirl’s (JEEM, 2009) “oligopoly meets oligopsony” model of a permit market for the case of heterogeneous players. Both oligopolists and oligopsonists reduce welfare by restricting trade. Having both in the market reinforces this. However, oligopolists seek to increase the...