Competing with Complementors: An Empirical Look at Amazon.com* Feng Zhu Harvard University Boston, MA 02163 Email:
[email protected] Qihong Liu University of Oklahoma Norman, OK 73019 Email:
[email protected] Keywords: complementor, platform-based markets, Amazon, entry, co-opetition __________________ * For helpful discussions and insightful comments, we thank the associate editor and two anonymous reviewers, Juan Alcacer, Chris Forman, Shane Greenstein, Rebecca Henderson, Steve Herbert, Jerry Kane, Tobias Kretschmer, Michael Kummer, Christian Peukert, Gary Pisano, Henry Schneider, Aaron Smith, Scott Stern, Andy Wu, David Yoffie, participants in the TOM Red Zone Workshop and the Annual TOM Alumni Research Workshop at the Harvard Business School, IO Workshop at the University of Oklahoma, the Wharton Technology and Innovation Conference, the 13th International Industrial Organization Conference, the 6th Annual Conference on Internet Search and Innovation at Northwestern University, Platform Strategy Research Symposium, the Annual Meeting of the Academy of Management, and seminar participants at Bocconi University, Cheung Kong Graduate School of Business, Harvard Business School, University of Maryland, University of Michigan, University of Minnesota, New York University, University of Pennsylvania, Rice University, and University of Texas at Austin. Zhu gratefully acknowledges financial support from the Division of Research of the Harvard Business School. Competing with Complementors: An Empirical Look at Amazon.com Abstract Research summary: Platform owners sometimes enter complementors’ product spaces and compete against them. Using data from Amazon.com to study Amazon’s entry pattern into third-party sellers’ product spaces, we find that Amazon is more likely to target successful product spaces. We also find that Amazon is less likely to enter product spaces that require greater seller efforts to grow, suggesting that complementors’ platform-specific investments influence platform owners’ entry decisions.