我的一位同事考學生這個問題,「What is a free-rider problem?」
一學生在考卷中回答,「一個大胖子在飛機上一人佔兩位置。」
科普一下:
From Wikipedia:「In economics, collective bargaining, psychology, and political science,"free riders" are those who consume more than their fair share of apublic resource, or shoulder less than a fair share of the costs of itsproduction.」