罗伯津斯基定理
罗伯津斯基定理（Rybczynski Theorem）：在商品相对价格不变的前提下，某一要素的增加会导致密集使用该要素部门的生产增加，而另一部门的生产则下降。
In a two-good world, and assuming that product prices areconstant, growth in the country's endowment of one factor of production, with the other facort unchanged, has has two results:
An increase in the output of the good that uses the growing factor intersively.
A decrease in the output of the other good.