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喜欢研究经济学的人都听过这样一个有趣的故事:猪圈里有两头猪,一头大猪,一头小猪。猪圈的一边有个踏板,每踩一下踏板,在远离踏板的猪圈的另一边投食口就会落下少量的食物。如果有一只猪去踩踏板,另一只猪就有机会抢先吃到另一边落下的食物。当小猪踩动踏板时,大猪会在小猪跑到食槽之前刚好吃光所有的食物;若是大猪踩动了踏板,则还有机会在小猪吃完落下的食物之前跑到食槽,争吃到另一半残羹。
People who like to study economics have heard such an interesting story: There are two pigs in a pigsty, one big pig and one piglet. There’s a pedal on one side of the sty, and every time you pedal, you drop a small amount of food on the other side of the sty, away from the pedal. If there is a pig to pedal, another pig has the opportunity to grab the other side of the first food. When a pig hits the pedal, the pig will eat all the food before the pig runs in the trough. If the pig hits the pedal, he will have the chance to run before the pig can eat the fallen food Trough, vying to eat the other half of the residue.