David Isaac Laibson (born June 26, 1966) is a professor of economics at Harvard University, where he has taught since 1994. His research focuses on macroeconomics, intertemporal choice, behavioral economics and neuroeconomics.Laibson is the son of Ruth and Peter Laibson, and grew up in Haverford, Pennsylvania. He received an A.B. (summa) from Harvard in 1988, studying under Benjamin M. Friedman, and went on to study at the London School of Economics (MSc.