He received his Ph.D. from the Toulouse School of Economics and focuses on Microeconomic Theory, Organizational Economics, and Industrial Organization. He is particularly interested in how organizations design decision rules and processes to foster information acquisition. He also conducts research on the media industry, which aims at understanding how the reliance on advertising revenues shapes newspapers’ pricing policies. Prior to joining Columbia, Charles was a Fellow at Harvard University in the Department of Economics. He also held a position at INSEAD where he taught Contract Theory.