In this paper we extend the collusion framework to allow for heterogeneity among firms, investment, entry and exit. The focus is on a model with symmetric information in which it is hard to sustain collusion when either; one of the firms does not keep up with the advances of its competitors...

In designing public policy it is not enough to consider the possible reaction of individuals to the chosen policy. Public policy may also affect the formation of preferences and norms in a society. The endogenous evolution of preferences, in addition to introducing a conceptual difficulty in...