this paper investigates the effect of exchange rate uncertainty on the iran’s import trade. the exchange rate ‎uncertainty series were generated utilizing the tarch model. this model analyzes the asymmetric effects. the analysis of uncertainty and asymmetry ‎of the exchange rate shows significant tarch ‎effect on iran’s exchange rates‎. the findings of the study indicate negative shocks (bad ne...

The majority of skill-upgrading in the United States in the 1980s and early 1990s was due to within industry shifts in skill-intensity. Traditional trade theory, represented by the HeckscherOhlin model, predicts that trade affects relative employment primarily by shifting resources across industries. For this reason, many economists have concluded that international trade has played a minor rol...

The last decade has seen two methodological advances of particular direct import for the theory of nite monoids and indirect import for that of rational languages. The rst has been the use of categories (considered as \algebras over graphs") as a framework in which to study monoids and their homomorphisms, the second has been the use of implicit operations to study pseudovarieties of monoids. S...

BACKGROUND To assess the effect of policies supporting local medicine production to improve access to medicines. METHODS We adapted the WHO/HAI instruments measuring medicines availability and prices to differentiate local from imported products, then pilot tested in Ethiopia and Tanzania. In each outlet, prices were recorded for all products in stock for medicines on a country-specific list....

Illegal timber harvesting is unsustainable and takes place around the world and in virtually every country that engages in forest harvesting. However, while the extent of these activities may be quite limited or negligible in some countries, in others they can lead to significant forest depletion, and subsequent biological and economic losses. China’s wood products industry has become reliant o...

The United States and Brazil both have many local consumer markets which imported cement can access by waterway. Despite this similarity, the degree of import penetration is strikingly di¤erent. While imports from around the world account for as much as 30% of U.S. cement consumption, Brazil hardly imports cement. U.S. cement producers, facing lower inbound trade costs and higher marginal costs...

MUCH attention has been devoted to the study of the structure of tariffs in industrial nations and its impacts on the level and composition of their imports from developing countries. Studies have identified two sources of bias against imports from developing countries inherent in tariff structures of industrial nations. First, tariffs used by industrial nations have been found to bear more hea...

Recent increases in imports of catfish, shrimp, and crawfish have caused concern as to their impact on domestic prices. This study seeks to identify the linkages between imports of these goods and producer prices. Increases in imports of catfish and shrimp are shown to decrease related domestic prices. However, recent trends show a simultaneous increase in both imports and domestic prices of cr...