Re-evaluating Microfinance: Evidence from Propensity Score Matching
使用倾向得分匹配方法分析随机对照试验数据，通过比较不同借款群体，评估小额信贷对家庭支出的影响，发现其对部分家庭有适度改善。
We evaluate effectiveness of microfinance using Propensity Score Matching (PSM) method applied to data collected in a recent randomized control trial. This method allows us to answer an additional set of questions not answered by the original study and provide more nuanced evidence by comparing Microfinance Institution (MFI) borrowers to those without any loans and those with prior loans from other sources. We argue that this unique setting with two comparison groups allows us to shed light on the unobservable entrepreneurial spirit bias and provides upper and lower bounds on the true microfinance impact. Our results suggest that microfinance can make a modest difference for some households in several expenditure categories.