We develop a political-economic model of aid fungibility. A donor country gives aid to a recipient government for the benefit of a target group. However, the recipient government accepts political contributions from a lobby group not targeted by the donor and transfers a fraction of the aid to...

This paper introduces the concept of a steepest ascent tariff reform for a small open economy. By construction, it is locally optimal in that it yields the highest gain in utility of any feasible tariff reform vector of the same length. Accordingly, it provides a convenient benchmark for the...

We show that the standard concertina result for tariff reforms -- i.e. lowering the highest tariff increases welfare -- no longer holds in general if we allow for international capital mobility. The result can break down if the good whose tariff is lowered is not capital intensive. If the...

This Paper examines the welfare implications of non-discriminatory tariff reforms by a subset of countries, which we term a non-preferential trading club. We show that there exist coordinated tariff reforms, accompanied by appropriate income transfers between these countries, which unambiguously...

We examine the interaction between commodity taxes and parallel imports in a simple two-country model with imperfect competition. While governments determine non-cooperatively their commodity tax rate, the volume of parallel imports is determined endogenously by the retailing sector. We compare...

Reducing tariffs and increasing consumption taxes is a standard IMF advice to countries that want to open up their economy without hurting government finances. Indeed, theoretical analysis of such a tariff-tax reform shows an unambiguous increase in welfare and government revenues. The present...

This Paper introduces an index of tax optimality that measures the distance of some current tax structure from the optimal tax structure in the presence of public goods. In doing so, we derive a [0; 1] number that reveals immediately how far the current tax configuration is from the optimal one...

It is observed in the real world that taxes matter for location decisions and that multinationals shift profits by transfer pricing. The US and Canada use Formula Apportionment (FA) to tax corporate income, and the EU is debating a switch from Separate Accounting (SA) to FA. This paper develops...

We examine how a multinational's choice to centralize or de-centralize its decision structure is affected by country tax differentials. Within a simple model that emphasizes the multiple conflicting roles of transfer prices in MNEs - here, as a strategic pre-commitment device and a tax...