| 主讲人简介： | Tat-How Teh joined The Chinese University of Hong Kong (Shenzhen) as an assistant professor in economics in 2021. Prior to that, he studied at the National University of Singapore for his PhD. His research interests are platform economics, consumer search, industrial organization, and more generally applied microeconomic theory. His works have been published at journals such as RAND Journal of Economics, Games and Economic Behavior, American Economic Journal: Microeconomics. |
| 讲座简介： | We provide a general framework to analyze competition between any number of two-sided platforms, in which buyers and sellers can multihome, and platforms compete on transaction fees charged on both sides. The framework allows buyers and sellers to have heterogenous benefits from using platforms for transactions, and additionally, buyers to have idiosyncratic preferences over using the different platforms. We highlight that multihoming in participation is not the only thing driving market outcomes; one has to also take into account buyers' preferences over which platform they transact on. We show how key primitives such as the number of platforms, the fraction of buyers that find multihoming costly, the value of transactions for buyers and sellers, and the degree of buyer heterogeneity jointly determine the level and structure of platform fees. |
