This paper investigates the effects of internal in-migration on cooperation in rural farming communities in Zambia. Potentially, in-migration could trigger discrimination, decrease overall levels of trust, and hence negatively impact the propensity for collective action. We measure cooperative behavior through self-reported survey information and incentivized decisions in a lab-in-the-field experiment. First, we find no evidence in the survey and experimental data that in-migration negatively affects cooperation across villages. Second, we find evidence that in villages where income inequalities between migrants and locals are more pronounced, migrants contribute more to public goods if exposed as the minority in the experiment. (JEL H41, O15)

中文翻译：

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移民如何造福贫困社区：赞比亚农村集体行动的证据

本文研究了内部移民对赞比亚农村农业社区合作的影响。潜在地，移民可能会引发歧视，降低整体信任水平，从而对集体行动的倾向产生负面影响。我们通过自我报告的调查信息和现场实验室实验中的激励决策来衡量合作行为。首先，我们在调查和实验数据中没有发现任何证据表明移民会对跨村合作产生负面影响。其次，我们发现有证据表明，在农民工与当地人收入不平等更加明显的村庄，如果农民工在实验中作为少数群体暴露，他们对公共产品的贡献更大。(JEL H41, O15)