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Essays On Markets With Frictions, Hyesung Yoo

Arts & Sciences Electronic Theses and Dissertations

In this dissertation, I explore the implications of various forms of frictions on market outcomes.Specifically, I look at search frictions in two-sided markets, geographic frictions in a healthcare market, and the use of a machine learning approach in the presence of regulatory frictions. In the first chapter, I leverage the entry of a high-speed train system in South Korea as a natural experiment to establish the causal effect of competition between hospitals on health care quality and consumer welfare. Using a difference-in-differences estimator, we examine the effects of competition on hospitals depending on their proximity to train stations, notably how …