The Causal Effect of Competition on Prices and Quality: Evidence from a Field Experiment
通过在多米尼加共和国随机引入61家新企业进入72个市场，研究发现竞争使价格下降2%至6%，并显著提升了服务质量。
This paper provides experimental evidence on the effect of increased competition on prices and quality in the retail sector. We randomized the entry of 61 firms into 72 markets serving the beneficiaries of a conditional cash transfer program in the Dominican Republic. Six months after the intervention, entry into the market led to reductions in prices ranging from 2 to 6 percent and to a statistically significant improvement in self-reported service quality. Prices dropped more in areas where the number of entrants was larger. Competition seems to have driven part of the clientele away from incumbent retailers.