Books and book chapters
- (with David B. Yoffie) in The Palgrave Encyclopedia of Strategic Management, 2014
- Chapter 3 in The Oxford Handbook of the Digital Economy, 2012.
- (with Kevin Boudreau) Chapter 7 in The Oxford Handbook of the Digital Economy, 2009.
- (with David S. Evans and Richard Schmalensee) MIT Press, 2006