In this paper we use a model of vertical product differentiation to cast doubt on the general validity of the import demand function as specified in macroeconomic models. The empirical importance of our theoretical concerns is then established. According to our first hypothesis, the share of a...

This paper uses a model of trade in vertically differentiated products to examine the effects of excessive wage increases (i.e. above productivity) on the volume of commodity imports. The model predicts that for commodities, in which the country has comparative advantage in high quality...

This paper uses a model of trade in vertically differentiated products to examine the effects of "excessive wage" increases (i.e. above productivity) on the volume of commodity imports. The model predicts that for commodities, in which the country has comparative advantage in high quality...

Most macroeconomic models imply that faster output growth tends to lower a country's trade balance by raising its imports with little change to its exports. Krugman (1989) proposed a model in which countries grow by producing new varieties of goods. In his model, faster-growing countries are...

This paper empirically examines the long-run pass through of the official exchange rates into trade balance in Nigeria by means of threshold cointegration and asymmetric error correction modeling. The study provides evidence for non-linear cointegration between our variables of interest. The...

This paper studies the role of the patterns of production and international trade on the higher business cycle volatility of emerging economies. We study a multi-sector small open economy in which firms produce and trade commodities and manufactures. We estimate the model to match key...