A global map of amenities: Public goods, ethnic divisions and decentralization
利用OpenStreetMap数据构建全球公共设施数据集，分析族群分裂对公共品供给的影响，发现族群异质性高的自治地区在分权下提供的生产性公共品显著更少。
I analyze the effects of ethnic divisions on the provision of public goods in countries throughout the world. Using OpenStreetMap data, I construct a new, global dataset that pinpoints locations of public amenities, such as schools, hospitals, and libraries. I devise two new proxies to address the variability in the completeness of such data. I find that more autonomous subnational regions with a high degree of ethnic fractionalization provide significantly fewer productive public goods. Therefore, decentralization can decrease the provision of local public goods in areas characterized by higher levels of ethnic heterogeneity than those that prevail nationwide.