Michael Mauboussin Decision making is an inherently social exercise. Here, Michael Mauboussin details three shocking psychological studies that reveal just how another’s action or opinion can profoundly change your own.

About the author:
Mauboussin is chief investment strategist at Legg Mason Capital Management and an adjunct professor at Columbia Business School. He is the author of More Than You Know: Finding Financial Wisdom in Unconventional Places (Columbia University Press, 2006) and (with Alfred Rappaport) of Expectations Investing: Reading Stock Prices for Better Returns.