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Title: Three empirical studies on the impact of electronic word-of-mouth on digital microproducts 
Author: Amblee, Naveen
Date: 2007
Description: Thesis (Ph.D.)--University of Hawaii at Manoa, 2007. Digital microproducts---such as Apple's 99-cents I-tunes songs or's 49-cents short books, or Disney's $4.99 short videos---are products in digital forms that can be delivered anywhere, at any time, at a low acquisition cost and no delivery costs. Since the selling price is small, fixed and identical to all products, it no longer plays an important role in the purchasing decision. As traditional micro-economic theory does not fully apply to these types of microproducts, an increasing body of research suggests that word-of-mouth has taken over price as the key demand factor. The purpose of this dissertation is to measure the impacts of electronic word-of-mouth (eWOM), as a signal of product reputation, brand reputation and reputation of complementary goods, on the microproduct buying decision. This dissertation consists of three empirical studies using digital short stores (Shorts) from and freeware downloads from Shorts are condensed versions of books in PDF format sold for a fixed price of 49 cents. In this research, eWOM consists of product reviews and ratings posted on the e-book marketplace and the software marketplace. The first essay studies the impact of eWOM on sales performance of Amazon Shorts, and also maps the change in the predictive power of eWOM over time. The second study focuses on the impact of brand and complementary goods reputations, signaled by eWOM, on the likelihood of first and additional product eWOM being posted, as well as the likelihood of those additional eWOM significantly impacting sales. The third study looks at the impact of expert and amateur user reviews on demand for digital microproducts with zero cost, using freeware from This dissertation makes several unique contributions to the growing body of research on eWOM, including a comprehensive and integrated study on the impact of eWOM as a signal of product reputation, brand reputation and complementary goods reputation. eWOM-based demand models for digital microproducts are also developed, and two longitudinal studies contribute to an understanding of the dynamic impact of eWOM over time. It also sheds new evidence on the interplay between reviews by critics and amateurs. Includes bibliographical references (leaves 117-125). Also available by subscription via World Wide Web 124 leaves, bound 29 cm
ISBN: 9780549600329
Rights: All UHM dissertations and 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 from the copyright owner.

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