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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 …

Peer Interactions In Decision Making, Yijun Chen

Arts & Sciences Electronic Theses and Dissertations

The broad research topic of my dissertation is individual’s decision making in the presence of peer interactions. I focus on empirical settings where individuals are connected with others in the peer network, and through peer interactions, their decisions are interdependent. Peer network structures in terms of who is connected with whom and the mechanisms of peer interactions convey valuable information on the decision making process. I employ quantitative empirical methods to uncover the information embedded in peer networks, provide insights on the mechanisms of peer interactions, and generate peer-network based managerial implications.

Chapter 1 studies how participants collaborate to compete …