UNC Kenan-Flagler Business School Professor Chris Bingham talked to CNN about his research on “boomerang CEOs” after Bob Iger took back the helm at The Walt Disney Co. last month, saying that bringing in a proven leader makes sense but can also signal that the company is looking to the past rather than focusing on innovation. Bingham also spoke about boomerang CEOs on Vox’s “Today, Explained” podcast.