Do Online Reviews Matter? - an Empirical Investigation of Panel Data
George Washington University - School of Business
Arizona State University (ASU) - Department of Information Systems
Andrew B. Whinston
University of Texas at Austin - Department of Information, Risk and Operations Management
Decision Support Systems, Vol. 45, No. 4, pp. 1007-1016, November 2008
This study examines the persuasive effect and awareness effect of online user reviews on movies' daily box office performance. In contrast to earlier studies that take online user reviews as an exogenous factor, we consider reviews both influencing and influenced by movie sales. The consideration of the endogenous nature of online user reviews significantly changes the analysis. Our result shows that the rating of online user reviews has no significant impact on movies' box office revenues after accounting for the endogeneity, indicating that online user reviews have little persuasive effect on consumer purchase decisions. Nevertheless, we find that box office sales are significantly influenced by the volume of online posting, suggesting the importance of awareness effect. The finding of awareness effect for online user reviews is surprising as online reviews under the analysis are posted to the same website and are not expected to increase product awareness. We attribute the effect to online user reviews as an indicator of the intensity of underlying word-of-mouth that plays a dominant role in driving box office revenues.
Number of Pages in PDF File: 33
Keywords: Online User Review, Word-of-Mouth, Product Sale, Motion Picture
JEL Classification: L82, M31Accepted Paper Series
Date posted: November 9, 2004 ; Last revised: September 27, 2011
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