1991, BA, Duke; 1995, PhD Stanford. The Economics of Technology Professor, Stanford Graduate School of Business. Teaching and research interests include economics of the Internet, online advertising auctions, news media, virtual currency and big data. Long-term consultant and former Chief Economist, Microsoft Corporation, focusing on online advertising. Member of the Board of Directors, Ripple Labs (financial technology). 2012, elected to US National Academy of Sciences. John Bates Clark Medal (best American Economist under 40 - 2007).