Title: The economics of internet markets
Description: "The internet has facilitated the creation of new markets characterized by large scale, increased customization, rapid innovation and the collection and use of detailed consumer and market data.  I describe these changes and some of the economic theory that has been useful for thinking about online advertising markets, retail and business-to-business e-commerce, internet job matching and financial exchanges, and other internet platforms.  I also discuss the empirical evidence on competition and consumer behavior in internet markets and some directions for future research"--National Bureau of Economic Research web site.