When asked to name one proposition in the social sciences that is both true and non-trivial, Paul Samuelson famously replied: `Ricardo's theory of comparative advantage'. Truth, however, in Samuelson's reply refers to the fact that Ricardo's theory of comparative advantage is mathematically...

The theory of comparative advantage is at the core of neoclassical trade theory. Yet we know little about its implications for how nations should conduct their trade policy. For example, should import sectors with weaker comparative advantage be protected more? Conversely, should export sectors...

The number of preferential trade agreements has greatly increased over the past two decades, yet most existing arrangements take the form of free trade areas, and less than ten percent can be considered to be fully fledged customs unions. This paper develops a political economy model of trade...

The objective of this paper is to provide indicators of trade restrictiveness that include both measures of tariff and non-tariff barriers for 91 developing and developed countries. For each country, we estimate three trade restrictiveness indices. The first one captures the extent to which...

This Paper assesses the foreign lobbying forces behind the tariff preferences that the United States grants to Latin American countries. The basic framework is one developed by Grossman and Helpman (1994) that is extended to explain the relationship between foreign lobbying and tariff...

This Paper provides a new approach to the evaluation of pre-shipment inspection (PSI) programs as ways of improving tariff-revenue collection and reducing fraud when customs administrations are corrupt. We build a model highlighting the contribution of surveillance firms to the generation of...

We consider a Heckscher-Ohlin model in which goods and factors of production can be traded, but trade involves transactions costs. Goods trade alone will not equalize factor prices, so there is an incentive for trade in factors of production. Whether goods or factors are traded depends on...