Per Capita Income and the Mystery of Missing Trade

The literature on the Heckscher–Ohlin–Vanek (HOV) model has concentrated on the production side, particularly the unrealistic assumptions of identical techniques and factor price equalization. However, less is known about the demand side. In this paper, we compare the supply side assumptions versus the demand side assumptions as a cause of the empirical failures in the HOV prediction. While the relaxation in the supply side assumptions is crucial to predict the direction of factor trade, the demand side assumptions are shown to play an important role in explaining why factor trade is “missing” in relation to the HOV prediction. For example of the slope test for labor, the supply side repair improves from 0.026 to 0.162, whereas the demand side repair improves significantly from 0.162 to 0.891.