Promotional Reviews: An Empirical Investigation of Online Review Manipulation
Online reviews could, in principle, greatly improve consumers' ability to evaluate products. However, the authenticity of online user reviews remains a concern; firms have an incentive to manufacture positive reviews for their own products and negative reviews for their rivals. In this paper, we marry the diverse literature on economic subterfuge with the literature on organizational form. We undertake an empirical analysis of promotional reviews, examining both the extent to which fakery occurs and the market conditions that encourage or discourage promotional reviewing activity. Specifically, we examine hotel reviews, exploiting the organizational differences between two travel websites: Expedia.com and TripAdvisor.com. While anyone can post a review on TripAdvisor, a consumer can only post a review of a hotel on Expedia if she actually booked at least one night at the hotel through the website. We examine differences in the distribution of reviews for a given hotel between TripAdvisor and Expedia. We exploit the characteristics of a hotel's neighbor. We show that hotels with a nearby neighbor have more one- and two-star (negative) reviews on TripAdvisor relative to Expedia. We argue that the net gains from promotional reviewing are likely to be highest for independent hotels that are owned by single-unit owners and lowest for branded chain hotels that are owned by multi-unit owners. Our methodology thus isolates hotels with a disproportionate incentive to engage in promotional reviewing activity. We show that the hotel neighbors of hotels with a high incentive to fake have more one- and two-star (negative) reviews on TripAdvisor relative to Expedia than do hotels whose neighbors have a low incentive to fake. Furthermore, we show that hotels with a high incentive to fake have a greater share of five-star (positive) reviews on TripAdvisor relative to Expedia.
|Date of creation:||Aug 2012|
|Date of revision:|
|Publication status:||published as Mayzlin, Dina, Yaniv Dover, and Judith Chevalier. 2014. "Promotional Reviews: An Empirical Investigation of Online Review Manipulation." American Economic Review, 104(8): 2421-55.|
|Contact details of provider:|| Postal: National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.|
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- Melnik, Mikhail I & Alm, James, 2002. "Does a Seller's Ecommerce Reputation Matter? Evidence from eBay Auctions," Journal of Industrial Economics, Wiley Blackwell, vol. 50(3), pages 337-49, September.
- Dina Mayzlin & Jiwoong Shin, 2011. "Uninformative Advertising as an Invitation to Search," Marketing Science, INFORMS, vol. 30(4), pages 666-685, July.
- Jonah Berger & Alan T. Sorensen & Scott J. Rasmussen, 2010. "Positive Effects of Negative Publicity: When Negative Reviews Increase Sales," Marketing Science, INFORMS, vol. 29(5), pages 815-827, 09-10.
- Nelson, Philip, 1974. "Advertising as Information," Journal of Political Economy, University of Chicago Press, vol. 82(4), pages 729-54, July/Aug..
- Mark Duggan & Steven D. Levitt, 2002.
"Winning Isn't Everything: Corruption in Sumo Wrestling,"
American Economic Review,
American Economic Association, vol. 92(5), pages 1594-1605, December.
- Mark Duggan & Steven D. Levitt, 2000. "Winning Isn't Everything: Corruption in Sumo Wrestling," NBER Working Papers 7798, National Bureau of Economic Research, Inc.
- Brian A. Jacob & Steven D. Levitt, 2003. "Rotten Apples: An Investigation of the Prevalence and Predictors of Teacher Cheating," NBER Working Papers 9413, National Bureau of Economic Research, Inc.
- Brian A. Jacob & Steven D. Levitt, 2003. "Rotten Apples: An Investigation of the Prevalence and Predictors of Teacher Cheating," The Quarterly Journal of Economics, Oxford University Press, vol. 118(3), pages 843-877.
- Blair,Roger D. & Lafontaine,Francine, 2011.
"The Economics of Franchising,"
Cambridge University Press, number 9780521775892, june. pag.
- Milgrom, Paul & Roberts, John, 1986.
"Price and Advertising Signals of Product Quality,"
Journal of Political Economy,
University of Chicago Press, vol. 94(4), pages 796-821, August.
- Paul Resnick & Richard Zeckhauser & John Swanson & Kate Lockwood, 2006.
"The value of reputation on eBay: A controlled experiment,"
Springer, vol. 9(2), pages 79-101, June.
- Resnick, Paul & Zeckhauser, Richard & Swanson, John & Lockwood, Kate, 2003. "The Value of Reputation on eBay: A Controlled Experiment," Working Paper Series rwp03-007, Harvard University, John F. Kennedy School of Government.
- Archishman Chakraborty & Rick Harbaugh, 2010.
"Persuasion by Cheap Talk,"
American Economic Review,
American Economic Association, vol. 100(5), pages 2361-82, December.
- Simon P. Anderson & Régis Renault, 2006.
American Economic Review,
American Economic Association, vol. 96(1), pages 93-113, March.
- Chrysanthos Dellarocas, 2006. "Strategic Manipulation of Internet Opinion Forums: Implications for Consumers and Firms," Management Science, INFORMS, vol. 52(10), pages 1577-1593, October.
- Emir Kamenica & Matthew Gentzkow, 2011. "Bayesian Persuasion," American Economic Review, American Economic Association, vol. 101(6), pages 2590-2615, October.
- Stefano DellaVigna & Eliana La Ferrara, 2007.
"Detecting Illegal Arms Trade,"
NBER Working Papers
13355, National Bureau of Economic Research, Inc.
- Kyle Bagwell & Garey Ramey, 1994.
"Advertising and Coordination,"
Review of Economic Studies,
Oxford University Press, vol. 61(1), pages 153-171.
- Dina Mayzlin, 2006. "Promotional Chat on the Internet," Marketing Science, INFORMS, vol. 25(2), pages 155-163, 03-04.
- Kihlstrom, Richard E & Riordan, Michael H, 1984. "Advertising as a Signal," Journal of Political Economy, University of Chicago Press, vol. 92(3), pages 427-50, June.
- Ginger Zhe Jin & Phillip Leslie, 2009. "Reputational Incentives for Restaurant Hygiene," American Economic Journal: Microeconomics, American Economic Association, vol. 1(1), pages 237-67, February.
- Dziuda, Wioletta, 2011. "Strategic argumentation," Journal of Economic Theory, Elsevier, vol. 146(4), pages 1362-1397, July.
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