Migration can contribute to economic growth. Its impact on ethnic diversity may also generate socio-cultural tensions and political instability. Having said that, ethnic diversity can play a role in both promoting and hindering economic growth depending on its form and extent. This role often rests on the levels of either ethnic fractionalization (usually related to higher economic growth) or ethnic polarization (more commonly associated with lower economic growth). Such considerations raise a question about the ways ethnic diversity mediates the relationship between internal migration and economic growth. The following paper responds to that question by focusing on different regions of Indonesia. Drawing on comprehensive statistics and updated classification of Indonesia’s ethnic groups, it presents new evidence on the archipelago’s ethnic diversity which is cross-referenced with recent fractionalization and polarization indexes. This methodological enhancement allows the study to translate with a greater degree of accuracy the mediation of ethnic diversity on the relationship between internal migration and economic growth across Indonesia’s regions than previously carried out. What emerges is a rather mixed picture of the intermediating role of ethnic diversity. There is a significant influence in various regions, but different sets of variables also modulate the relationship in others. We can also discern an identifiable link between the economic region in question, the indicators of ethnic diversity referenced, and the given rate of migration. Placed in composite relief, the findings draw attention to the uneven and complex character of Indonesia’s regional development.

移民可以促进经济增长。它对种族多样性的影响还可能导致社会文化紧张和政治不稳定。话虽如此，种族多样性可以在促进和阻碍经济增长方面发挥作用，具体取决于其形式和程度。这一作用通常取决于种族分化（通常与较高的经济增长有关）或种族极化（更常见与较低的经济增长有关）的水平。这些考虑提出了一个问题，即种族多样性如何调节国内移民与经济增长之间的关系。以下论文通过关注印度尼西亚的不同地区来回答这个问题。它利用印度尼西亚种族群体的综合统计数据和最新分类，提供了有关该群岛种族多样性的新证据，并与最近的分化和两极分化指数交叉引用。这种方法上的改进使得该研究能够比以前的研究更准确地解释种族多样性对印度尼西亚各地区内部移民与经济增长之间关系的调节作用。种族多样性的中介作用呈现出一幅相当复杂的景象。在不同地区都有显着影响，但不同的变量组也会调节其他地区的关系。我们还可以辨别相关经济区域、所参考的种族多样性指标以及给定的移民率之间的可识别联系。综合地貌显示，调查结果引起人们对印度尼西亚区域发展不平衡和复杂特征的关注。