Fare Structure and the Demand for Public Transit

时间：2023年3月24日（周五）9:00-10:30

讲座形式：Zoom线上讲座

（校外听众请发送简短自我介绍至xlgao@nsd.pku.edu.cn获取讲座链接）

主持人：张丹丹、黄炜

参与老师：赵耀辉、李玲、刘国恩、雷晓燕、易君健

主讲人：冀雨楠（Yunan Ji） Georgetown University.

摘要：Prices are a signi_cant driver of high health care spending in the US, but how to reduce prices remains an open question. I examine one widely-touted solution -set-ting prices via competitive bidding-in the context of a Medicare payment reform.The reform gradually replaced administratively-set prices with prices from competitive bidding for durable medical equipment (DME) in 100 metropolitan statistical areas. Using detailed claim-level data, I estimate that the competitive bidding program reduced the prices of covered items by 45%. However, the program also generated an 11% reduction in quantity, which several pieces of evidence suggest is associated with inecient supply shortages. One likely cause of the shortage is the auction design, which allows winning bidders to renege on supply commitment. Leveraging novel bid data, I estimate an equilibrium model of optimal bidding and find that the program generated prices that were on average 7% below the market clearing price, which is consistent with the observed supply shortages. I use the results to show that counterfactual auction designs could reach the desired market quantity while saving 42% in government spending relative to administratively-set prices. The analysis highlights the importance of auction design in achieving desirable outcomes, and suggests that a well-designed competitive bidding program could potentially generate large savings in health care.

主讲人简介：Yunan Ji is an Assistant Professor at the Georgetown University McDonough School of Business and a Research Associate at the Institute for Fiscal Studies. Her research studies the design and regulation of health care markets, with a focus on health care payment models. Her work has been published in the Quarterly Journal of Economics, the New England Journal of Medicine, the Proceedings of the National Academy of Sciences, the Journal of the American Medical Association, among others. Her studies have been cited by media outlets including Bloomberg, the Boston Globe, the New York Times, and the Washington Post. She received her Ph.D. in Health Policy and Economics from Harvard University in 2022 and her B.A. in Mathematics and Economics from Brown University in 2014.