Customer reviews are increasingly available online for a wide range of products and services. They supplement other information provided by electronic storefronts such as product descriptions, reviews from experts, and personalized advice generated by automated recommendation systems. While researchers have demonstrated the benefits of the presence of customer reviews to an online retailer, a largely uninvestigated issue is what makes customer reviews helpful to a consumer in the process of making a purchase decision. Drawing on the paradigm of search and experience goods from information economics, we develop and test a model of customer review helpfulness. An analysis of 1,587 reviews from Amazon.com across six products indicated that review extremity, review depth, and product type affect the perceived helpfulness of the review. Product type moderates the effect of review extremity on the helpfulness of the review. For experience goods, reviews with extreme ratings are less helpful than reviews with moderate ratings. For both product types, review depth has a positive effect on the helpfulness of the review, but the product type moderates the effect of review depth on the helpfulness of the review. Review depth has a greater positive effect on the helpfulness of the review for search goods than for experience goods. We discuss the implications of our findings for both theory and practice.
The Internet was a major factor in the 2008 U.S. presidential campaign and has become an important tool for political communication and persuasion. Yet, information systems research is generally silent on the role of the Internet in politics. In this paper, we argue that IS is positioned to enhance understanding of the influence of the Internet on politics, and, more specifically, the process of election campaigning using Internet-based technologies such as Web 2.0. In this paper, we discuss how these technologies can change the nature of competition in politics and replace or complement traditional media. Our empirical study on how Web 2.0 technologies were used by the candidates leading up to the 2008 U.S. presidential primaries sheds light on how these technologies influenced candidate performance. Finally, we outline a research agenda highlighting where IS can contribute to the academic discourse on e-politics.