Jaeyoung Sung is currently Professor Emeritus of Finance at Ajou University, South Korea. He served as principal investigator of the WCU (World Class University) project to establish a world-class financial engineering program at Ajou University. He also taught at University of Illinois at Chicago, and he was visiting professor at Washington University in St. Louis, University of New South Wales, and University of Southern California. His research interests lie in agency theory, asset pricing and market microstructure. He has published on continuous-time agency problems in economics and finance journals such as Journal of Economic Theory, Rand Journal of Economics, Review of Financial Studies, Mathematical Finance, and others.