NO.PZ2018062003000184
问题如下：
In the Heckscher–Ohlin model, what will happen as a country opens up to trade?
选项：
A.It will have a favorable impact on the scarce factor and a negative impact on the abundant factor.
B.It will have a favorable impact on the abundant factor and a negative impact on the scarce factor.
C.The price of the export good decreases and the price of the import good increases.
解释：
B is correct.
When a country opens up to trade, the abundant factor gains more relative to the scarce factor in each country. This result is because trade causes the price of the export good to increase and the price of the import good to decline.These price changes affect the demand for factors used to produce the import and export goods,and hence affect the incomes received by each factor of production.
考点：Heckscher–Ohlin model
根据HO模型，一国资源禀赋丰富的具有比较优势，比如一国劳动力资源丰富，那么该国就应该出口劳动密集型产品，发展劳动密集型产业。那么劳动力在该国就会被大量需求，劳动力就能获得更高的生产报酬分配。相反该国资本资源稀缺，那么它就从外国进口资本密集型产品，发展资本密集型产型。资本要素在该国就不受待见，不仅受到进口品的冲击，能够分的的生产报酬也比较少。所以B选项正确，A选项错误。
C选项是一个打酱油的选项，HO模型并没有此结论。
从进出口的角度，如果丰富就要出口，反而刺激需求，价格会高；如果不足，会进口来弥补，反而价格会低。
从供需的角度，如果丰富，价格会低，如果不足稀缺，价格会高。
这两个角度有时候可能会在一个题目中混淆，怎么避免呢？或者思考什么问题时候用什么逻辑呢？
