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...

We investigate the similarity of the country endowments of the newly industrialized East Asian countries (NICs) and their major developed trading partners since the 1960s. In particular, we analyze their factor endowments in the years 1965, 1977, and 1990, using the lens condition of <link rid="b1">Deardorff...