If you experience any technical difficulties with this video or would like to make an accessibility-related request, please send a message to [email protected]. There is an economic approach to matchmaking, pioneered in the early 1960s and advanced by Chicago's Gary Becker in the 1970s. Today, there are online matchmakers of many sorts: auction sites like eBay that match buyers and sellers, search platforms like Google that match ads with consumers, and, of course, online dating sites. In this talk, Ali Horta~ASSsu will discuss recent research that connects economic theory to hugely popular matchmaking Web sites of all types. This includes Horta~ASSsu's own work based on the collection of data from eBay, Google, and a major online dating site.