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How much is a Dollar Worth? Tipping versus Equilibrium Coexistence on Competing Online Auction Sites

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  • Brown, Jennifer
  • Morgan, John
Abstract
The equilibrium model of Ellison, Fudenberg, and Möbius (2004) predicts that, if two competing auction sites are coexisting, then seller revenues and buyer-seller ratios on each site should be approximately equal. We examine these hypotheses using field experiments selling identical items on the eBay and Yahoo auction sites. We find evidence that is inconsistent with the equilibrium hypotheses, and suggest that the eBay-Yahoo market is in the process of tipping. Robust statistical tests indicate that revenues on eBay are consistently 20 to 70 percent higher than those on Yahoo. In addition, eBay auctions attract approximately two additional buyers per seller than equivalent Yahoo auctions. We also vary the Yahoo ending rule from a hard close to soft close but find no statistically or economically significant changes in revenue or numbers of bidders. Moreover, the magnitude of the revenue and buyer-seller ratio disparities remain inconsistent with the notion of equilibrium coexistence even after accounting for various differentiators between the sites.

Suggested Citation

  • Brown, Jennifer & Morgan, John, 2006. "How much is a Dollar Worth? Tipping versus Equilibrium Coexistence on Competing Online Auction Sites," Competition Policy Center, Working Paper Series qt3c21w91h, Competition Policy Center, Institute for Business and Economic Research, UC Berkeley.
    • Handle: RePEc:cdl:compol:qt3c21w91h
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    References listed on IDEAS

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    Cited by:

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    3. Liran Einav & Chiara Farronato & Jonathan Levin, 2016. "Peer-to-Peer Markets," Annual Review of Economics, Annual Reviews, vol. 8(1), pages 615-635, October.
    4. Shiu, Ji-Liang & Sun, Chia-Hung D., 2014. "Modeling and estimating returns to seller reputation with unobserved heterogeneity in online auctions," Economic Modelling, Elsevier, vol. 40(C), pages 59-67.
    5. Sander Onderstal, 2020. "Premium auctions in the field," Review of Economic Design, Springer;Society for Economic Design, vol. 24(1), pages 39-63, June.
    6. Omar Al-Ubaydli & John A. List, 2016. "Field Experiments in Markets," NBER Working Papers 22113, National Bureau of Economic Research, Inc.
    7. Oriana Bandiera & Iwan Barankay & Imran Rasul, 2011. "Field Experiments with Firms," Journal of Economic Perspectives, American Economic Association, vol. 25(3), pages 63-82, Summer.
    8. Laurent Lamy, 2013. "“Upping the ante”: how to design efficient auctions with entry?," RAND Journal of Economics, RAND Corporation, vol. 44(2), pages 194-214, June.
    9. Jonathan Levin, 2011. "The Economics of Internet Markets," Discussion Papers 10-018, Stanford Institute for Economic Policy Research.
    10. Han, Jidong & Popkowski Leszczyc, Peter T.L. & Zhang, Zelin, 2021. "Empirical Analyses of Nonlinear Effects of Reserve Prices on Ending Prices in Online Auctions," Journal of Interactive Marketing, Elsevier, vol. 54(C), pages 86-102.
    11. Shuchi Chawla & Jason D. Hartline & Denis Nekipelov, 2016. "A/B Testing of Auctions," Papers 1606.00908, arXiv.org.
    12. Syngjoo Choi & Lars Nesheim & Imran Rasul, 2010. "Reserve price effects in auctions: estimates from multiple RD designs," CeMMAP working papers CWP30/10, Centre for Microdata Methods and Practice, Institute for Fiscal Studies.
    13. Yan Chen & Peter Cramton & John A. List & Axel Ockenfels, 2021. "Market Design, Human Behavior, and Management," Management Science, INFORMS, vol. 67(9), pages 5317-5348, September.
    14. Sascha Füllbrunn & Abdolkarim Sadrieh, 2012. "Sudden Termination Auctions—An Experimental Study," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 21(2), pages 519-540, June.
    15. Janne Tukiainen, 2017. "Effects of Minimum Bid Increments in Internet Auctions: Evidence from a Field Experiment," Journal of Industrial Economics, Wiley Blackwell, vol. 65(3), pages 597-622, September.
    16. Tanjim Hossain & Dylan Minor & John Morgan, 2011. "Competing Matchmakers: An Experimental Analysis," Management Science, INFORMS, vol. 57(11), pages 1913-1925, November.
    17. Wen Cao & Qinyang Sha & Zhiyong Yao & Dingwei Gu & Xiang Shao, 2019. "Sniping in soft-close online auctions: empirical evidence from overstock," Marketing Letters, Springer, vol. 30(2), pages 179-191, June.
    18. Glover, Brent & Raviv, Yaron, 2012. "Revenue non-equivalence between auctions with soft and hard closing mechanisms: New evidence from Yahoo!," Journal of Economic Behavior & Organization, Elsevier, vol. 81(1), pages 129-136.
    19. Ian Ayres & Mahzarin Banaji & Christine Jolls, 2015. "Race effects on eBay," RAND Journal of Economics, RAND Corporation, vol. 46(4), pages 891-917, October.
    20. Michael Ostrovsky & Michael Schwarz, 2023. "Reserve Prices in Internet Advertising Auctions: A Field Experiment," Journal of Political Economy, University of Chicago Press, vol. 131(12), pages 3352-3376.
    21. Yang, Wei & Xiao, Baichun & Wu, Lifang, 2020. "Learning and pricing models for repeated generalized second-price auction in search advertising," European Journal of Operational Research, Elsevier, vol. 282(2), pages 696-711.
    22. Syngjoo Choi & Lars Nesheim & Imran Rasul, 2016. "Reserve Price Effects In Auctions: Estimates From Multiple Regression-Discontinuity Designs," Economic Inquiry, Western Economic Association International, vol. 54(1), pages 294-314, January.

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