This paper considers the relative efficiency of ad valorem and unit taxes in imperfectly competitive markets. We provide a simple proof that ad valorem taxes are welfare-superior to unit taxes in the short run when production costs are identical across firms. The proof covers differentiated...

We analyze the incidence of ad valorem and unit excise taxes in an oligopolistic industry with differentiated products and price-setting (Bertrand) firms. Both taxes may be passed on to consumers by more than 100 percent, and an increase in the tax rate can increase short run firm profits (and...

We analyze non-cooperative commodity taxation in a two-country trade model characterized by monopolistic competition and international firm and capital mobility. In this setting, taxes in one country affect foreign welfare through the relocation of mobile firms and through changes in the rents...

This paper shows that the welfare dominance of ad valorem over unit taxes under imperfect competition, extends to the Dixit-Stiglitz framework with differentiated products, entry and love of variety. This contrasts against findings by Anderson et al. (J Public Econ, 2001) made in a similar...

The paper compares non-cooperative commodity taxation under the destination and origin principles under a variety of different assumptions about market structure. We consider a model of international duopoly with either quantity or price competition of firms and either segmented or integrated...

We consider a government facing a constraint on the total consumption of a specific good with varieties, and formulate an optimal commodity tax problem under a consumption target. We obtain a uniform pricing result (similar to the familiar uniform taxation rule): setting the same consumer price...

We construct a perfectly competitive general equilibrium model of two large and symmetric countries producing tradable commodities and a public consumption good. Destination or origin-based taxes are levied on the consumption of the tradable goods. In both countries, an institutional minimum...

This paper investigates the merits of increasing work incentives for low-income workers by shifting part of the tax burden from social security contributions (SSC) to consumption taxes (specifically VAT) in 13 European OECD countries. Simulation results based on household budget survey microdata...

This paper makes a fresh attempt at characterizing optimal commodity taxes. Under the usual assumptions, an extremely simple expression of second-best commodity taxes is derived, showing tax rates as functions of observable variables only, rather than as functions of unobservable variables such...

In his thought-provoking book What Money Can't Buy. The Moral Limits of Markets, Sandel (2012) claims that some nonmarket ways of allocating goods, such as the ethics of the queue (first come, first served), are gradually being displaced by the ethics of the market. He highlights inequality as...