进口税（import tariff)

How might a developing country's decision to reduce trade restrictions such as import tariffs affect its ability to borrow in the world capital market？

B．最惠国税

C．普通税

D．普惠制税

In the discussion of empirical results on the Heckscher-Ohlin model，we noted that recent work suggests that the efficiency of factors of production seems to differ internationally．Explain how this would affect the concept of factor price equalization．

Explain why the Leontief paradox and the more recent．Bowen，Leamer，and Sveikauskas results repotted in the text contradict the factor-proportions theory．

The U.S. labor movement-which．mostly represents blue-collar workers rather than professionals and highly educated workers-has traditionally favored limits on imports from less-affluent countries．Is this a shortsighted policy or a rational one in view of the interests of union members？ How does the answer depend on the model of trade？