He has a PhD in economics from Stanford University. His areas of specialization are in network economics and competition policy. His recent research interests include work on two-sided platforms, exclusive dealing and collusion. He has studied and consulted for industries such as mobile telephony and card payment networks, where his work is frequently cited by policymakers. He is also editor of the Review of Network Economics and Associate Editor of the Journal of Industrial Economics. More information on his research can be found at: http://profile.nus.edu.sg/fass/ecsjkdw/