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Abstract:
In this paper we examine the empirical relevance of three prominent endogenous protection models. Is protection for sale, or do altruistic policy makers worry about political support? We find strong evidence that protection is indeed "for sale." The important new result is, however, that not only the existence of lobbies matters, but also the relative size of the sectoral pro and anti protection contributions. All variables of both the Influence Driven (Grossman and Helpman, 1994) and the Tariff Function (Findlay and Wellisz, 1982) models are significant at the one percent level. Novel is our application of a single, unified theoretical framework to take strict interpretations of the three theoretical models to the data. We thus extend the previous tests of the Influence Driven approach by comparing its performance to well specified alternatives. Using J tests to compare the power of the models directly, we find significant misspecification in the Political Support Function approach. We cannot reject the null hypothesis of correct specification of the Influence Driven model and find evidence of some misspecification in the Tariff Function model.

Abstract:
Empirical evidence of the impact of borders on international trade flows using the gravity equation approach abounds. This paper examines the empirical relevance of state borders in U.S. interstate trade for various specifications of the gravity equation. We find a large and economically significant subnational border effect for some specifications. However, two model specifications drastically reduce (if not eliminate) the border effect: (i) dynamic panel specifications controlling for past levels of trade and (ii) models conditioning on internal migration.

Abstract:
In this paper, we use a multisector specific-factors model with sector-specific capital and two mobile factors, skilled and unskilled labor, to examine the effects of trade, technology, and factor endowments on the skill premium in US manufacturing industries. Based on this model and data for the US manufacturing sector from 1958-96, we calculate changes in the skill premium and then carry out a decomposition to identify the changes caused by product price changes (trade), technological progress, labor, and capital endowment changes. The decomposition reveals that trade effects, working through product price changes, caused the skill premium to increase moderately. Changes in capital endowments (new investments) had a positive effect on the skill premium, with the strongest impact during the 1980s, while the effect of technological change on the skill premium varied over time. Finally, changes in relative labor endowments had a negative effect on the skill premium.

Abstract:
This paper investigates the impact of foreign reserves, domestic real income and relative import prices on import demand for seven Latin American countries. We differentiate empirically between the short-run and long-run impact of reserves, income and prices on imports. The paper has three main results. First, we show that there exists a unique long-run relationship among real imports, real income, relative import prices and real foreign exchange reserves for all seven countries. Second, we find that increases in foreign exchange reserves exert a significant positive effect on import demand in both the long run and the short run in all countries. However, the economic impact of foreign exchange reserves is rather small. Finally, we find that the long- and short-run impact of real domestic income on import demand is positive as well, while the effect of relative prices is negative.

Abstract:
This paper develops a two-country dynamic general equilibrium model with endogenous growth to analyze the effects of international trade on steady state growth. The two countries differ both in preferences and in technologies. We show first, that both countries cannot simultaneously experience increases in consumption growth from trade. Second, we show that trade can increase output growth for both countries if the attitude toward saving matches the change in the terms of trade in each country. A country facing a decline (rise) in its output price grows faster if its intertemporal elasticity of substitution is sufficiently low (high).