FASS Staff Profile


65 6516 4674

Brief Introduction

Citizenship:      New Zealand
Degrees:          PhD Stanford University 1996; BSc (Hons) University of Canterbury 1991

Head of Department (July 1, 2012 - )

Co-Editor of International Journal of Industrial Organization

Research Interests

Multi-Sided Platforms

Industrial Organisation

Network Economics

Competition Policy




  • "Creating platforms by hosting rivals" (with Andrei Hagiu and Bruno Jullien)
  • "Steering by information intermediaries" (with Tat-How Teh)
  • "Platform minimum requirements" (with Andrei Hagiu)
  • "Search platforms: Showrooming and price parity clauses" (with Chengsi Wang)
  • "Pricing distortions in multi-sided platforms" (with Hongru Tan)
  • "Real-time pricing and imperfect competition in electricity markets" (with Stephen Poletti)


  • "The optimality of ad valorem contracts" Management Science, forthcoming (with Andrei Hagiu)
  • "Signaling private choices" Review of Economic Studies, 2018, Vol. 85: 558–580 (with Younghwan In)
  • "Loss-leader pricing and upgrades," Economics Letters, 2014, Vol. 122: 19-22 (with Younghwan In)


  • "Platforms and the exploration of new products" Management Science, forthcoming (with Andrei Hagiu)
  • "The status of workers and platforms in the sharing economy" Journal of Economics & Management Strategy, forthcoming (with Andrei Hagiu)
  • "A price theory of multi-sided platforms: Comment" American Economic Review, forthcoming (with Hongru Tan)
  • "Controlling versus enabling" Management Science, forthcoming (with Andrei Hagiu)
  • "Should platforms be allowed to charge ad valorem fees?" Journal of Industrial Economics, forthcoming (with Zhu Wang)
  • "Why (don’t) firms free ride on an intermediary’s advice?" International Journal of Industrial Organization, forthcoming (with Bo Shen)
  • "Ad-valorem platform fees, indirect taxes and efficient price discrimination" RAND Journal of Economics, 2017, Vol. 48: 467–484 (with Zhu Wang)
  • "Payment card interchange fees and price discrimination" Journal of Industrial Economics, 2017, Vol. 65: 39-72 (with Rong Ding) 
  • "Price coherence and excessive intermediation" Quarterly Journal of Economics, 2015, Vol. 130: 1283-1328 (with Benjamin Edelman)
  • "Multi-sided platforms" International Journal of Industrial Organization, 2015, Vol. 43: 162-174 (with Andrei Hagiu)
  • "Marketplace or reseller?" Management Science, 2015, Vol. 61: 184–203 (with Andrei Hagiu)
  • "Price Restrictions in Multi-sided Platforms: Practices and Responses." Competition Policy International, 2014, Vol. 10, Iss. 2 (with Benjamin Edelman)
  • "The economics of payment cards" Review of Network Economics, 2014, Vol. 13: 303-353 (with Marc Rysman)
  • "Do you really want to be an eBay?" Harvard Business Review, March 2013 (with Andrei Hagiu)
  • "Why payment card fees are biased against retailers" RAND Journal of Economics, 2012, Vol. 43: 761-780. 
  • "Credit card interchange fees" Journal of Banking and Finance, 2010, Vol. 34: 1788-1797 (with Jean-Charles Rochet)
  • "Why do merchants accept payment cards?" Review of Network Economics: Vol. 9, Iss. 3, Article 1.
  • "Mobile call termination" Economic Journal, 2009, Vol. 119: 270-307 (with Mark Armstrong)
  • "Two-Sided Markets" in The New Palgrave Dictionary of Economics, 2nd Edition, Larry Blume and Steven Durlauf (eds.), Palgrave Macmillan, 2008 (with Mark Armstrong)
  • "Credit Card Industry" The New Palgrave Dictionary of Economics, 2nd Edition, Larry Blume and Steven Durlauf (eds.), Palgrave Macmillan, 2008 (with Victor Stango).
  • "Two-sided markets, competitive bottlenecks and exclusive contracts" Economic Theory, 2007, Vol. 32, 353-380 (with Mark Armstrong)
  • "Competing payment schemes" Journal of Industrial Economics, 2007, Vol. 55, 37-67 (with Graeme Guthrie)
  • "Price Structure in Two-Sided Markets: Evidence from the Magazine Industry," International Journal of Industrial Organization, 2006, Vol. 24, 1-28 (with Ulrich Kaiser)
  • "Multihoming and Compatibility," International Journal of Industrial Organization, 2006, Vol. 24, 45-67 (with Toker Doganoglu).
  • "Interchange Fees in Various Countries: Developments and Determinants" Review of Network Economics, 2005, Vol. 4: 290 - 323 (with Stuart Weiner)
  • "The Determinants of Optimal Interchange Fees in Payment Systems," Journal of Industrial Economics, 2004, Vol. 52: 1-26.
  • "One-Sided Logic in Two-Sided Markets," Review of Network Economics, 2004, Vol. 3: 42-63.
  • "Pricing in Debit and Credit Card Schemes," Economics Letters, 2003, Vol. 80: 305-309.
  • "Optimal Card Payment Systems," European Economic Review, 2003, Vol. 47: 587-612.


  • "Exclusion via non-exclusive contracts" Canadian Journal of Economics, 2014, Vol. 47: 325-347 (with Aggey Semenov)
  • "Exclusive dealing with network effects" International Journal of Industrial Organization, 2010, Vol. 28: 145-154 (with Toker Doganoglu)
  • "Exclusive dealing and entry, when buyers compete: Comment" American Economic Review, 2009, Vol. 99: 1070-1081.
  • "Exclusive dealing with imperfect downstream competition", International Journal of Industrial Organization, 2008, Vol. 26: 227-246 (with Jose Miguel Abito)
  • "Naked exclusion and the anticompetitive accommodation of entry," Economics Letters, 2008, Vol. 98, 107-112.


  • "Punishment strategies in repeated games: Evidence from experimental markets," Games and Economic Behavior, 2013, Vol. 82 (November): 91-102.
  • "Tacit collusion with price-matching punishments" International Journal of Industrial Organization, 2010, Vol. 28: 298-306 (with Yuanzhu Lu)


  • "Mobile Call Termination" Economic Journal, 2009, Vol. 119: 270-307 (with Mark Armstrong)
  • “The UK regulation of fixed-to-mobile termination” in Cases in European Competition Policy: The Economic Analysis, Cambridge University Press, 2009 (with Mark Armstrong).
  • "Mobile Termination" Chapter 5 in Access Pricing: Theory and Practice. Ralf Dewenter and Justus Haucap (Eds.) Elsevier, Amsterdam (2007) (with Olivier Renard and Harley Thompson). 
  • "Pricing Access: Forward versus Backward Looking Cost Rules," European Economic Review, 2006, Vol. 50, 1767-1789  (with Graeme Guthrie and John Small)
  • "Wireless Communications" Handbook of Telecommunications Economics, Volume 2. 2005. Martin Cave et al. (eds.) North Holland: Amsterdam. (with Joshua Gans and Stephen King).
  • "Pricing access to Internet service providers," Information, Economics and Policy, 2004, Vol. 16: 459-473.
  • "Network Interconnection with Participation Constraints," Information, Economics and Policy, 2004, Vol. 16: 347-373 (with Stephen Poletti).
  • "Competition in telecommunications: an introduction," Information, Economics and Policy, 2004, Vol. 16: 315-321 (with Martin Peitz and Tommaso Valletti)
  • "Asymmetric Network Interconnection," Review of Industrial Organization, 2003, Vol. 22: 27-46 (with Michael Carter).
  • "Access Pricing under Competition: An Application to Cellular Networks," Journal of Industrial Economics, 2002, Vol. L(3): 289-315.
  • "Bill and Keep as the Efficient Interconnection Regime?" Review of Network Economics, 2002, Vol 1: 54-60.
  • "Peering and Settlement in the Internet: An Economic Analysis," Journal of Regulatory Economics, 2000, Vol. 18: 151-173 (with Iain Little)
  • "Bargaining over Interconnection: The Clear-Telecom Dispute," The Economic Record, 1999, Vol. 75: 241-55 (with Michael Carter).
  • "International Telecommunications, Settlement Rates, and the FCC," Journal of Regulatory Economics, 1999, Vol. 15: 267-291.
  • "Interconnection in Network Industries," Review of Industrial Organization, 1999, Vol. 14: 1-25 (with Michael Carter).
  • "Symbiotic Production: The Case of Telecommunication Pricing," Review of Industrial Organization, 1994, Vol. 9: 365-378 (with Michael Carter).
  • "Optimal Telecommunication Tariffs and the CCITT," Telecommunication Journal, March 1992, 59 (with Michael Carter).


  • "The Optimal Design of Interest Rate Target Changes," Journal of Money, Credit and Banking, 2004, Vol. 36: 115-137 (with Graeme Guthrie).
  • "Open Mouth Operations," Journal of Monetary Economics, 2000, Vol. 46: 489-516 (with Graeme Guthrie).
  • "How do Firms choose their Lenders? An Empirical Investigation," Review of Financial Studies, 2000, Vol. 13: 155-189 (with Miguel Cantillo).
  • "The Forward Premium Bias under Different Monetary Policy Environments," Briefing Notes in Economics, 2000, Vol. 48: 1-5 (with David Steele).
  • "Testing the Expectations Theory of the Term Structure for New Zealand," New Zealand Economic Papers, 1999, Vol. 33: 93-114. (with Graeme Guthrie and Jun Yu)
  • "Optimal Currency Denomination of Public Debt in New Zealand," New Zealand Economic Papers, 1997, Vol. 31: 137-151 (with Kerryn Fowlie).
  • "Policy Credibility and Debt Management in a Small Open Economy," New Zealand Economic Papers, 1993, Vol. 27: 81-89 (with Paul Dalziel).


  • "Online Appendix: Controlling versus enabling" (with Andrei Hagiu)
  • "Online Appendix: Should platforms be allowed to charge ad valorem fees?" (with Zhu Wang)
  • "Online Appendix: Why (don’t) firms free ride on an intermediary’s advice?" (with Bo Shen)
  • "Online Appendix: Signaling private choices" (with Younghwan In)
  • "Online Appendix: Ad-valorem platform fees, indirect taxes and efficient price discrimination" (with Zhu Wang)
  • "Supplementary Appendix. Punishment strategies in repeated games: Evidence from experimental markets"
  • Supplementary Appendix to "Exclusive Dealing with Network Effects" (with Toker Doganoglu)
  • "Supplementary Appendix for Tacit Collusion with Price-Matching Punishments" (with Yuanzhu Lu)
  • "Technical Appendix to: Exclusive Dealing with Imperfect Downstream Competition," mimeo, National University of Singapore (with Jose Miguel Abito)
  • Naked Exclusion and the Anticompetitive Accommodation of Entry: Two Examples
  • Supplementary material: "Appendix for Multihoming and Compatibility"
  • "The Determinants of Optimal Interchange Fees in Payment Systems," Supplementary Appendix.
  • Supplementary material: "Competing Payment Schemes," NUS Working Paper No. 0311 (with Graeme Guthrie)
  • Supplementary material: "Competing Payment Schemes," Working Paper No. 245. Department of Economics. University of Auckland (with Graeme Guthrie)
  • "Interconnection in Network Industries," Supplementary Appendix.



  • "The Bilateral Negotiation of Interchange Fees in Payment Schemes" (with John Small)
  • "Competition and Termination in Cellular Networks" Working Paper. Downloadable from http://papers.ssrn.com/sol3/papers.cfm?abstract_id=201988
  • The Optimal Public Debt Portfolios For Nine OECD Countries: A Tax Smoothing Approach (with Christian Hawkesby)

Other Information

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