Comparative advantage refers to an economic situation to produce a good at the lowest opportunity cost. Here the trade exchange between China and USA shows how the Law of Comparative holds in real world. With the amount of trade taking place between two countries, the law holds that these trading partners are promoting their self interests by producing the goods for which they have low opportunity cost and trading another good for which they have high opportunity cost(CFA Institute 376).
Since USA and China have low opportunity cost to produce agricultural goods and machinery respectively. These countries are involved ...