Empirically, Trefler (1995) shows that actual trade flows deviate from predictions based on factor abundance theory in a systematic way (which he calls the ‘case of the missing trade’). Theoretically, Courant and Deardorff (1992) show that an uneven distribution of factors of...

In the post-war period, the goods composition of trade in Organisation for Economic Cooperation and Development (OECD) countries has changed considerably. We analyze the evolution of comparative advantage using a detailed trade data set and a new analytical tool: the Harmonic Mass index (HM...

Empirically, Trefler (1995) shows that actual trade flows deviate from predictions based on factor abundance theory in a systematic way (which he calls the 'case of the missing trade'). Theoretically, Courant and Deardorff (1992) show that an uneven distribution of factors of production across...

The trade literature often treats countries as dimensionless points, which is a strong assumption. Agglomeration or lumpiness of production factors within countries can affect the national pattern of trade. In this paper we analyze comparative advantage patterns for 22 cities and 4 regions for...

Traditional trade theory assumes that countries are dimensionless points. Recent research shows, however, that the internal geography of countries is important for the effects on trade. One aspect of internal geography is the uneven spatial distribution of factors of production. Factors of...