We examine tariff reforms in the context of a small open economy and simultaneously deal with three extensions of the current literature: nonremovable domestic tax distortions, nontraded goods, and many households. Using the new concepts of a constant utility tax adjusted balance of trade function and a constant utility productivity improvement in tariffs, necessary and sufficient conditions for the existence of strict Pareto improving tariff and transfer reforms are established. We also consider directional tariff reforms such as movements towards the world price vector, proportional reductions, and reductions of extreme tariffs. Also discussed is the role of normality of household preferences. Most of the literature on piecemeal tariff reform in small open economies has been concerned with models in which there is a single household and in which domestic commodity taxes are absent. An exception to this is Lloyd (1974), who allows the existence of domestic commodity taxes but maintains the assumption of a single household. Nor does he consider nontraded commodities (other than nontaxed fixed factors). Others such as Foster and Sonnenschein (1970), Bertrand and Vanek (1964), Bruno (1972), Hatta (1977b) and Fukushima (1979) deal with single household economies with no domestic distortions. The purpose of this paper is to consider the question of tariff reform in a very general model of a small, open economy. The generality of the model allows us to simultaneously deal with three extensions of the current literature. The first extension is to allow for nonremovable domestic tax distortions, the second is to incorporate nontraded commodities into the model and the third is to explicitly consider a multi-household economy. By dealing simultaneously with these extensions to the model we are able to provide a general treatment of tariff reform in small open economies and to obtain new and more general results. Since domestic tax distortions are prevalent in the real world, it is important that they be taken into account in any analysis of tariff reform. Specifically, it is of considerable theoretical and policy interest to determine whether the piecemeal tariff policy prescriptions that have been derived in the literature for models
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