There is another principle in economics is the comparative advantage, which is the comparison among producers of a good according to their opportunity cost. There is no person or a producer in the world could have this advantage at all good. When one has the comparative advantage over one good, he or she must lose the edge over the other thing. This is the golden rule in the economics, which is also a golden rule in the life philosophy.

The principle of comparative advantage is served for the reasonable existence of trade. The trade makes people life better off because trade allows everybody to exert their comparative advantage on one field and make exchange the goods by trade. Similarly, the life rolls the same way. That is why we call for the cooperation. My favorite teacher of economics told us if possible it was fun to take some time to discuss marriage from economical perspective. I am willing to have a shot with no more than one ounce of economical knowledge, though I have never experienced marriage. All the ensuing states are assumptions, which are just the assumptions.

My civil law professor defines the marriage as the lifetime partnership based on love. This is an interest illustration. Firstly, Love initiates the special relationship, but it never contains the stability of the relationship for lifetime. Secondly, the nature of the marriage is partnership. Two different individuals from remote places come together and combine together to live together for the rest of life. What they need is not merely the love and passion but the requirements of making their life happier and better. Thus, cooperation plays a vital role in the partnership. How can we cooperate in a friendly and efficient way? I think there are at least three determinants. To begin with is tolerant. The partners should understand each other and think of each other with empathy. The second is communication. Talking and conversation can smooth many frictions. The last but not least one is comparative advantage benefits. Two people handle with diverse fields well and help each other in their skilled areas. The wife likes cooking and experts in it, while the husband mows the lawn better. Thus, they can devote themselves in the perspective jobs. Marriage reduces the cost of talking in trades. This is one reason I am for marriage.