城市卫生设施中的无社会互动溢出效应
Spillovers without Social Interactions in Urban Sanitation
American Economic Journal: Applied Economics · 2024 · [{"name": "Joshua Deutschmann", "affiliation": ["University of Chicago"]}, {"name": "Molly Lipscomb", "affiliation": ["University of Virginia"]}, {"name": "Laura Schechter", "affiliation": ["University of Wisconsin–Madison", "Agricultural & Applied Economics Association"]}, {"name": "Jessica Zhu", "affiliation": ["Precision Research (United States)"]}]
中文摘要
我们在达喀尔城区开展了一项随机对照试验，并结合实地实验室社会网络实验。决策溢出效应和健康外部性在决定卫生技术采用方面发挥着重要作用，其中决策溢出效应在未获得显著补贴的家庭中最大。没有证据表明这些溢出效应可由一般意义上的社会力量解释，也没有证据表明其可归因于向他人学习、社会压力或互惠等特定社会机制。我们确实发现了影响决策的第四种非社会机制的证据：健康收益递增。随着更多邻居采用卫生技术，其他家庭采用该技术也变得更值得。（JEL I12, O12, O13, O18, Q53, Q55, Z13）
Abstract
We run a randomized controlled trial coupled with lab-in-the-field social network experiments in urban Dakar. Decision spillovers and health externalities play a large role in determining uptake of sanitation technology, with decision spillovers being largest among households that don’t receive significant subsidies. There is no evidence that the spillovers are explained by social forces in general, nor by specific social mechanisms such as learning from others, social pressure, or reciprocity. We do find evidence of a fourth, nonsocial, mechanism impacting decisions: increasing health benefits. As more neighbors adopt the sanitary technology, it becomes more worthwhile for other households to adopt as well. (JEL I12, O12, O13, O18, Q53, Q55, Z13)