This paper examines the output effect of an ad-valorem tax of undifferentiated oligopolistic firms in the Weber-Moses triangle.  It shows that an increase in the ad-valorem tax will increase each firm’s output but may increase the number of firms and total output of firms if the...

This paper examines the impact of the ad-valorem commodity tax as a policy device on output and location decisions of undifferentiated oligopolistic firms with free entry. It shows that: (1) When the distance between the plant location and the output market is held constant, the optimum...