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JoongHo Ahn

Bio: JoongHo Ahn is an academic researcher from Seoul National University. The author has contributed to research in topics: The Internet & Ontology (information science). The author has an hindex of 14, co-authored 47 publications receiving 1347 citations. Previous affiliations of JoongHo Ahn include College of Business Administration.

Papers
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Journal ArticleDOI
TL;DR: The results show that both peripheral cues, including review rating and reviewer's credibility, and central cues, such as the content of reviews, influence the helpfulness of reviews.
Abstract: With the growth of e-commerce, online consumer reviews have increasingly become important sources of information that help consumers in their purchase decisions. However, the influx of online consumer reviews has caused information overload, making it difficult for consumers to choose reliable reviews. For an online retail market to succeed, it is important to lead product reviewers to write more helpful reviews, and for consumers to get helpful reviews more easily by figuring out the factors determining the helpfulness of online reviews. For this research, 75,226 online consumer reviews were collected from Amazon.com using a Web data crawler. Additional information on review content was also gathered by carrying out a sentiment analysis for mining review text. Our results show that both peripheral cues, including review rating and reviewer's credibility, and central cues, such as the content of reviews, influence the helpfulness of reviews. Based on dual process theories, we find that consumers focus on ...

459 citations

Journal ArticleDOI
TL;DR: It was found that innovation attributes have an impact on constructs in the extended technology acceptance model such as perceived usefulness, perceived ease of use and perceived resources, which support the idea that congruent experiences and opportunities in adopting a new technology affect user attitudes through the three extended technologyaccept model constructs.
Abstract: Although many countries are attempting to build an information infrastructure and accelerate the adoption of broadband Internet access technology, the results are not always satisfactory. The focus of earlier research on the diffusion and adoption of broadband Internet access has been primarily on the construction of a national-level infrastructure or on macro-level factors such as government policies, market competition and the density of population. This research highlights the individual-level factors affecting the adoption of broadband access, integrating various views on the adoption and diffusion of technology, including the technology acceptance model, theory of planned behaviour and diffusion of innovation model. An extended technology acceptance model incorporating the notion of perceived resources is proved to be relevant in the adoption of broadband technologies. It was found that innovation attributes, such as compatibility, visibility and result demonstrability, have an impact on constructs in the extended technology acceptance model such as perceived usefulness, perceived ease of use and perceived resources. These results also support the idea that congruent experiences and opportunities in adopting a new technology affect user attitudes through the three extended technology acceptance model constructs above. This research suggests that efforts should be made to expand the compatible experience base of broadband Internet in order to facilitate its adoption and use. This paper also provides an extensive review of the adoption behaviour of individuals by incorporating different views and theories.

250 citations

Proceedings Article
01 Jan 2001
TL;DR: The study finds that all of the antecedent constructs directly and/or indirectly affect the consumer’s adoption of e-Commerce, and suggests that firms providing products/services through eCommerce should consider these contextual factors in order to facilitate consumers’ adoption behavior.
Abstract: The Internet has grown at a remarkable pace since the emergence of the World Wide Web in the early 1990s While electronic commerce (e-Commerce) has become an important issue with the growth of the Internet, there has been insufficient empirical research concerning its adoption by Internet users In this paper, we propose the e-Commerce Adoption Model (e-CAM), which attempts to examine important factors that predict a consumer’s online purchasing behavior e-CAM integrates the technology acceptance model with the theories of perceived risk to explain the adoption of e-Commerce Specifically, we examine the impact of the following factors on the consumer’s purchasing behavior: perceived ease of use, perceived usefulness, perceived risk with products/services, and perceived risk in the context of online transaction We test the e-CAM model using the structural equation modeling technique Most of the causal relationships between the constructs postulated by our model are well supported, accounting for 334% of the total variance in e-Commerce adoption In sum, our study finds that all of the antecedent constructs directly and/or indirectly affect the consumer’s adoption of e-Commerce Therefore, the findings suggest that firms providing products/services through eCommerce should consider these contextual factors in order to facilitate consumers’ adoption behavior

191 citations

Journal ArticleDOI
TL;DR: In this paper, the authors validate the e-commerce adoption model (e- CAM) on the two countries and provide interim support for the generalizability of e-CAM and suggest that online firms should consider these contextual factors in order to facilitate consumers' adoption behavior.
Abstract: While e-commerce has proliferated with the growth of the Internet, there have been insufficient research efforts concerning its status in Korea. The United States, in contrast, has made significant efforts in making empirical research on the consumer's adoption of e-commerce. This paper validates the e-Commerce Adoption Model (e- CAM) on the two countries. E-CAM integrates the technology acceptance model with the theories of perceived risk to explain the e-commerce adoption. The study findings not only provide interim support for the generalizability of e-CAM, but also suggest that online firms should consider these contextual factors in order to facilitate consumers' adoption behavior.

178 citations

Proceedings Article
01 Jan 2011
TL;DR: A model for investigating tweet sharing behavior on Twitter is proposed based on dual-process theory and on social cognitive theory and results show that individuals’ perceptions of the argument quality and source credibility of a received tweet play a major role in their information sharing behavior.
Abstract: Twitter, a 140-character microblogging social networking service, has garnered attention from researchers and practitioners due to its considerable potential for information diffusion. Prior studies on Twitter typically focused on how user traits or relationships in a network affect information diffusion. However, few studies have been conducted on how posted messages in the service influence this phenomenon. Thus, this paper focuses on posted messages (a.k.a. “tweets”) and how they affect individuals’ information sharing behaviors on Twitter. A model for investigating tweet sharing behavior on Twitter is proposed based on dual-process theory and on social cognitive theory. Results from a preliminary test show that individuals’ perceptions of the argument quality and source credibility of a received tweet play a major role in their information sharing behavior via the perceived level of usefulness of the information and self-efficacy in regard to the sharing of a received tweet. Additionally, the existence of external links in a tweet moderates the impact of argument quality on users’ attitudes toward received tweets.

57 citations


Cited by
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Journal ArticleDOI
TL;DR: Research on experienced repeat online shoppers shows that consumer trust is as important to online commerce as the widely accepted TAM use-antecedents, perceived usefulness and perceived ease of use, and provides evidence that online trust is built through a belief that the vendor has nothing to gain by cheating.
Abstract: A separate and distinct interaction with both the actual e-vendor and with its IT Web site interface is at the heart of online shopping Previous research has established, accordingly, that online purchase intentions are the product of both consumer assessments of the IT itself-specifically its perceived usefulness and ease-of-use (TAM)-and trust in the e-vendor But these perspectives have been examined independently by IS researchers Integrating these two perspectives and examining the factors that build online trust in an environment that lacks the typical human interaction that often leads to trust in other circumstances advances our understanding of these constructs and their linkages to behavior Our research on experienced repeat online shoppers shows that consumer trust is as important to online commerce as the widely accepted TAM use-antecedents, perceived usefulness and perceived ease of use Together these variable sets explain a considerable proportion of variance in intended behavior The study also provides evidence that online trust is built through (1) a belief that the vendor has nothing to gain by cheating, (2) a belief that there are safety mechanisms built into the Web site, and (3) by having a typical interface, (4) one that is, moreover, easy to use

6,853 citations

Journal ArticleDOI
TL;DR: The study confirmed the value of using students as surrogates for professionals in some TAM studies, and revealed the power of meta-analysis as a rigorous alternative to qualitative and narrative literature review methods.

2,347 citations

Journal ArticleDOI
TL;DR: The technology acceptance model (TAM), introduced in 1986, continues to be the most widely applied theoretical model in the IS field and cautiously predicts its future trajectory.
Abstract: While the technology acceptance model (TAM), introduced in 1986, continues to be the most widely applied theoretical model in the IS field, few previous efforts examined its accomplishments and limitations. This study traces TAM’s history, investigates its findings, and cautiously predicts its future trajectory. One hundred and one articles published by leading IS journals and conferences in the past eighteen years are examined and summarized. An openended survey of thirty-two leading IS researchers assisted in critically examining TAM and specifying future directions.

2,203 citations

01 Jan 2008
TL;DR: In this article, the authors argue that rational actors make their organizations increasingly similar as they try to change them, and describe three isomorphic processes-coercive, mimetic, and normative.
Abstract: What makes organizations so similar? We contend that the engine of rationalization and bureaucratization has moved from the competitive marketplace to the state and the professions. Once a set of organizations emerges as a field, a paradox arises: rational actors make their organizations increasingly similar as they try to change them. We describe three isomorphic processes-coercive, mimetic, and normative—leading to this outcome. We then specify hypotheses about the impact of resource centralization and dependency, goal ambiguity and technical uncertainty, and professionalization and structuration on isomorphic change. Finally, we suggest implications for theories of organizations and social change.

2,134 citations