Optimal Taxation in a Common Resource Oligopoly Game

In this paper, we investigate the optimal taxation policy in a differential oligopoly game where the competing firms share the access to a productive renewable resource. We show that, in a linear Feedback Nash Equilibrium of the game, a linear Markov tax, imposed on the output, and specified as an affine function of the available resource stock, leads the competing firms to produce the socially optimal quantities over time, thus overcoming the dynamic interplay between the tragedy of the commons and the firms' market power. The optimal tax turns out to be independent on the resource stock in a monopoly, and it cannot be defined for a duopoly