Word of mouth and marketing : influencing and learning from consumer conversations

This thesis contains three separate essays that deal with word of mouth. In the first essay, "Promotional Chat on the Internet," we analyze the firms' incentives to anonymously supply positive reviews of products in chat rooms and other recommendation sites. This, in turn, lowers the credibility of word of mouth transmitted online. We develop a game theoretic model where an incumbent and an entrant that are differentiated in quality compete for the same online market segment. The consumers are uncertain about the entrant's quality, whereas the firms know the value of their products. The consumers hear messages online that make them aware of the existence of the entrant as well as help them decide which product is superior. We find a unique equilibrium where online word of mouth is informative despite the promotional chat activity by competing firms. In this equilibrium, we find that firms spend more resources chatting up inferior products. We also find that promotional chat may be actually more beneficial to consumers than a system with no promotional chat. In the second essay, "Using Online Conversations to Measure Word of Mouth Communication," we test a long-held belief that word of mouth recommendations have a tremendous influence on the sales of new products. So far, there has been little empirical evidence to support this belief since, before the advent of the Internet, word of mouth recommendations were exchanged in private conversations that left no documentary evidence. The Internet provides a window into some of these private conversations and thus a means of measuring word of mouth activity.

Department dc:contributor.department

Sloan School of Management.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2002

Author dc:creator

• Mayzlin, Dina

Advisor dc:contributor.advisor

• Birger Wernerfelt.

• Sloan School of Management.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/40020

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/40020