If you have profit sharing in a firm or profit sharing in homework assignment, or any joint projects, you have to worry about too little effort being contributed because there's an externality.

如果你是一个公司的股东,或者和别人一起做作业及其他合作项目,你们需要注意到因为外部性,实际上每个人都付出了较少的努力

耶鲁公开课 - 博弈论课程节选

Why is it that when we see these law partners, or medical partners, or whatever it happens to be, or students together on a homework assignment, why is it we tend to get inefficiently little effort when we start figuring out the strategy and working through the game?

为什么这些律师事务所的律师,医疗合伙人或者其他类似的机构,还有一起做作业的学生,当我们研究过这些策略和博弈后,为何这样的组合往往是收效甚微的

耶鲁公开课 - 博弈论课程节选