Joshua Gans is Foundation Professor of Management (Information Economics) at the Melbourne Business School, University of Melbourne, where he has lectured on microeconomics, competition and contracting issues since 1996. He has a PhD from Stanford University, and in 2001 co-founded the economic consulting group, CoRE Research. Stephen King is a Commissioner with the Australian Competition and Consumer Commission. Prior to joining the ACCC, he was Professor of Economics in the Department of Economics and Professor of Management (Economics) at the Melbourne Business School, University of Melbourne. He received his PhD from Harvard University. Both are co-authors (with Robin Stonecash) of the Pacific Rim edition of Greg Mankiw's Principles of Economics.