The authors give a simple, constructive proof that the lens condition implies the factor price equalization condition when there are only two factors. Taking stock of the conditions under which the lens condition is equivalent to the factor price equalization condition, there are the conditions...

To gauge the effect of international trade on the rising US skill premium, the paper analyzes the sector bias of price changes induced by changes in US tariffs and transportation costs. It is found that, in both the 1970s and 1980s, cuts in tariffs and transportation cost levels were...

Since Heckscher's 1919 pioneering contribution to international trade theory, the concept of "factor intensity" has played a key role in explanations of trade patterns and the consequences of international trade for local income distribution. This essay discusses the uses that have been made of...

The effects of trade among similar countries and that among dissimilar countries on the relative wage are examined. Product quality is a choice variable by firms. Quantity production is assumed to satisfy constant costs, while quality production is more skilled-labor intensive than quantity...