David Rothschild is an economist at Microsoft Research. He has a Ph.D. in applied economics from the Wharton School of Business at the University of Pennsylvania. He has written extensively, in both the academic and popular press. His work pushes the boundaries on varying data and methods: polling, prediction markets, social media and online data, and large behavioral and administrative data. His work focuses on solving practical and interesting questions including: mapping and updating public opinion, the market for news, effect of advertising, finance, and an economist's take on public policy. Around elections, he works closely with both journalists and practitioners in examining and optimizing data and analytics for campaigns.