We study how peers affect in-group bias. Exploiting several umpiring reforms in international cricket matches—where two umpires make independent decisions in each other’s presence—we show that home-team umpires are less biased when working with a neutral colleague, that is, one who is neither a national of the home nor the foreign team. This temporary debiasing is driven by the social pressure umpires feel to be impartial in the presence of neutral peers. Performance evaluation by visually non-salient monitors does not reduce bias, suggesting that physical presence is an important component of debiasing and peer influence. (JEL J71, J15, D91)

中文翻译：

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同侪压力和歧视：来自国际板球比赛的证据

我们研究同伴如何影响群体内偏见。利用国际板球比赛中的几项裁判改革（两名裁判在彼此在场的情况下做出独立决定），我们表明，主队裁判在与中立同事（即既不是本国国民也不是本国国民）一起工作时，偏见较少。外国队。这种暂时的去偏见是由裁判员在中立同行面前保持公正的社会压力驱动的。通过视觉上不显着的监视器进行绩效评估并不能减少偏见，这表明实际存在是消除偏见和同伴影响的重要组成部分。（JEL J71、J15、D91）