Emily Fair Oster (born February 14, 1980) is an American economist and bestselling author. After receiving a B.A. and Ph.D. from Harvard in 2002 and 2006 respectively, Oster taught at the University of Chicago Booth School of Business. She later moved to Brown University, where she is Professor of Economics. Her research interests span from development economics and health economics to research design and experimental methodology. Her research has received exposure among non-economists through "The Wall Street Journal", the "SuperFreakonomics" bestseller book, and her 2007 TED Talk, among other media sources.