Not withstanding the equivalence in static framework between an ad-valorem and a specific sale tax, this paper shows in the dynamic Hotelling model for an exhaustible resource that the ad valorem tax is definitely welfare-superior to the specific tax.

In order to reach the state of economic sustainability, the problem of technology transition emphasizes the possibility of substituting for the exhaustible resource with an everlasting source of energy input. This paper aims at providing an analysis of this problem in an overlapping-generation...