Individuals tend to free-ride in teams, thus providing inefficiently low effort. We implement a system of confidential peer review in a randomly selected set of teams, whereby teammates complete an online survey to review the effort of their peers. These reviews are not linked to any rewards or sanctions, thus making them nonbinding. We find that nonbinding peer reviews increase effort and team productivity and do not decrease worker morale. The effects are stronger for low-ability individuals in low-ability teams, where the traditional forces of peer effects may be absent.

中文翻译：

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非约束性同行评审和团队努力：来自现场实验的证据

个人倾向于在团队中搭便车，从而提供低效的低努力。我们在随机选择的一组团队中实施保密同行评审系统，团队成员通过该系统完成在线调查，以审查其同行的努力。这些评论与任何奖励或制裁无关，因此不具有约束力。我们发现不具约束力的同行评审会增加工作量和团队生产力，并且不会降低员工的士气。对于能力低下的团队中的低能力个人来说，这种影响会更强，因为在那里可能不存在传统的同伴效应力量。