Sydney Finkelstein, professor at the Tuck School of Business at Dartmouth College, says that being the most knowledgeable and experienced person on your team isn't always a good thing. Expertise can steer you wrong in two important ways. It can stop you from being curious about new developments in your field. And it can make you overconfident about your ability to solve problems in different areas. He says that, to be effective leaders, we need to be more aware of these traps and seek out ways to become more humble and open-minded. Finkelstein is the author of the HBR article "Don't Be Blinded By Your Own Expertise."