The external effects of public housing developments on informal housing: The case of Medellín, Colombia
利用哥伦比亚麦德林的详细数据和工具变量策略，研究了补贴住房项目对周边非正规住区的影响，发现这些项目减少了非正规住房、贫困和犯罪，为评估社会住房项目的整体回报提供了新视角。
The provision of new subsidized housing projects presents an effective solution for alleviating the significant housing deficit in developing countries. However, limited knowledge exists regarding how these housing projects impact the quality of the surrounding environment, particularly when situated near informal settlements. By using highly detailed data from Medellin, Colombia, and employing an instrumental variables strategy, we estimate the external effects of social housing programs on the neighboring communities. Our results demonstrate that these projects contribute to a reduction in informal housing, poverty levels, and crime within the surrounding neighborhood. This external effect is significant and often overlooked when assessing the overall returns of social housing programs.