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1.
Should we collude? Analyzing the benefits of bidder cooperation in online group-buying auctions 总被引:2,自引:0,他引:2
Jian Chen Xilong Chen Robert J. Kauffman Xiping Song 《Electronic Commerce Research and Applications》2009,8(4):191-202
Cooperation among bidders in traditional auctions is typically forbidden. This is because it is viewed as being harmful to the interests of sellers, who hope to obtain fair prices for their sale items. It also may be harmful to other bidders who are not able to take advantage of any cooperation that is occurring. In online group-buying auctions, in contrast to traditional auctions, cooperation results in higher welfare, leading to market expansion that benefits buyers and sellers, as well as the auction intermediary. This has not been well understood in prior research, however. In this article, we show how the online group-buying auction mechanism on the Internet can be effectively enhanced to produce higher welfare for the participants. The key to achieving this, we find, is for the auction intermediary to provide a means for bidders to cooperate, so as to collectively express greater demand. Such cooperation, it turns out, permits the group-buying auction mechanism to dominate the fixed-price mechanism from the seller’s point of view under some circumstances. Through an analytical modeling analysis, we offer insights into how sellers can set their group-buying auction price curves more effectively, so as to take advantage of bidder cooperation to improve auction performance. We further argue that the goal of the auction intermediary should be to offer an information sharing mechanism to facilitate bidding ring formation, as a means to maximize the value of this market mechanism. 相似文献
2.
Yongqiang Sun Kai H. Lim Chunping Jiang Jerry Zeyu Peng Xiaojian Chen 《Computers in human behavior》2010
Informativeness and entertainment are regarded as two types of advertising value that can influence consumers’ attitudes toward Web advertising. Despite of many studies on these two factors, there are two research gaps in extant literature. First, the effects of informativeness and entertainment on attitude are considered separately, yet their interaction effect is neglected. Second, the role of individual characteristics (e.g., gender) in the advertising evaluation process is far from clear. To address these two issues, a laboratory experiment was conducted to investigate the interaction effect between informativeness and entertainment, and also the moderating role of gender. The results indicate that informativeness can help form a more positive attitude for males than for females, and entertainment can lead to a more positive attitude for females than for males. It is also found that there is a three-way interaction among informativeness, entertainment, and gender. More specifically, the interaction effect between informativeness and entertainment is significant for females, but insignificant for males. Results, research contributions, and limitations are discussed, and implications for future studies are suggested. 相似文献
3.
The influence of physicians' knowledge sharing on patient satisfaction in online medical consultations (OMCs) has received extensive attention in recent years. However, patient gratitude in OMCs, another crucial outcome for physicians' knowledge sharing, has largely been overlooked. To address this gap, this study attempts to distinguish patient satisfaction from gratitude in OMCs and elucidate the relationship between the sharing process and outcomes. Drawing on the affect theory of social exchange, this study proposes a model that investigates the relative effects of physicians' informational and emotional support during the knowledge-sharing process on patient satisfaction and gratitude, as well as the contingent roles of physicians' professional seniority and patients' disease severity. The research model is tested by using data from a well-known online health platform in China. The results indicate that patient gratitude is associated with a more favourable service evaluation than satisfaction in OMCs. Physicians' informational support has a greater effect on patient satisfaction than emotional support, while emotional support has a greater effect on patient gratitude than informational support. Moreover, professional seniority and disease severity positively and negatively moderate the relationship between emotional support and patient gratitude, respectively. A survey-based experiment is also adopted to validate the research model with self-reported perceptual measures. This study contributes to the literature on patient gratitude, online healthcare service evaluation, knowledge sharing, and the affect theory of social exchange. 相似文献
4.
Israr Qureshi Yulin Fang Elaine Ramsey Patrick McCole Patrick Ibbotson Deborah Compeau 《欧洲信息系统杂志》2009,18(3):205-222
Although e-commerce adoption and customers’ initial purchasing behavior have been well studied in the literature, repeat purchase intention and its antecedents remain understudied. This study proposes a model to understand the extent to which trust mediates the effects of vendor-specific factors on customers’ intention to repurchase from an online vendor. The model was tested and validated in two different country settings. We found that trust fully mediates the relationships between perceived reputation, perceived capability of order fulfillment, and repurchasing intention, and partially mediates the relationship between perceived website quality and repurchasing intention in both countries. Moreover, multi-group analysis reveals no significant between-country differences of the model with regards to the antecedents and outcomes of trust, except the effect of reputation on trust. Academic and practical implications and future research are discussed. 相似文献
5.
Understanding the effects of IT-related innovations on firm performance is crucial for businesses. Extant research has investigated the implications of IT innovations and provided some important findings, but the varied theoretical approaches have produced results that are often ambiguous: thus there is a need to examine the process further. We attempted to provide a systematic, theoretically informed framework for understanding the conditions that may enhance (or hinder) the potential of IT innovations in a sample of firms. Our model included business and IT resources, both internal and external, that may influence the performance of firms which have applied a pervasive IT service innovation: e-commerce. Our empirical test of the model used a research design that takes into account time-lag effects. The model explained more than half of the variance in the performance of IT innovators and offered several explanations for why some firms succeeded in implementing IT service innovations while others did not. Several theoretical and managerial implications result from these findings. 相似文献
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From a self-determination theory perspective, this study tries to investigate how perceived autonomy support, perceived relatedness and competence affect high school students’ intrinsic motivations (enjoyment and curiosity) to use the Internet, and the related outcomes of the motivation. Surveys are distributed to seven junior and ten senior high schools in a prefectural-level city in central China. Existing instruments from previous research are adapted to measure the following constructs: teacher support, parental support, peer influence, Internet self-efficacy, enjoyment, curiosity, flow state and online exploratory behavior. Finally, 3475 valid responses are collected. 相似文献
8.
Trust is generally assumed to be an important precondition for people’s adoption of electronic services. This paper provides an overview of the available research into the antecedents of trust in both commercial and non-commercial online transactions and services. A literature review was conducted covering empirical studies on people’s trust in and adoption of computer-mediated services. Results are described using a framework of three clusters of antecedents: customer/client-based, website-based, and company/organization-based antecedents. Results show that there are many possible antecedents of trust in electronic services. The majority of the research has been conducted in the context of e-commerce; only few studies are available in the domains of e-government and e-health. For many antecedents, some empirical support can be found, but the results are far from univocal. The research calls for more, and particularly more systematic, research attention for the antecedents of trust in electronic services. The review presented in this paper offers practitioners an overview of possibly relevant variables that may affect people’s trust in electronic services. It also gives a state-of-the-art overview of the empirical support for the relevance of these variables. 相似文献
9.
Neural Computing and Applications - Determining P and S wave arrival times while minimizing noise is a major problem in seismic signal analysis. Precise determination of earthquake onset arrival... 相似文献
10.
Selfishness vs. fairness are basic dimensions of relating to others, and many computer-mediated communications among young people involve subtle decisions balancing selfishness vs. fairness. We report five experiments investigating the influence of affect on interpersonal decisions in CMC in strategic games such as the dictator game and the ultimatum game. In the dictator game, proposers have unlimited power to make selfish or fair allocations. In the ultimatum game, decisions by proposers are subject to the veto powers of responders. These experiments predicted and found that negative mood consistently increased, and positive mood reduced concern with the fairness of allocations. Proposers in a negative mood showed greater fairness and offered more resources to a partner than did those in a positive mood, and such decisions also took longer confirming mood-induced processing differences. The results are discussed in terms recent affect-cognition theories, suggesting that positive affect recruits more assimilative, internally focused processing promoting selfishness, while negative affect induces more externally oriented, accommodative thinking and greater concern with social norms. The implications of the findings for everyday interpersonal behaviors and computer-mediated interactions involving selfishness vs. fairness are considered. 相似文献
11.
Khalid Durani Andreas Eckhardt Walid Durani Tim Kollmer Nils Augustin 《Information Systems Journal》2024,34(2):415-468
Gatekeepers, including prerogative elites and institutions, possess multifaceted tools for controlling information. Historically, these gatekeepers have systematically instrumentalized visual information to shape audience perceptions in alignment with specific agendas. However, the advent of social media platforms has disrupted these power dynamics, empowering audiences through user-driven visual information exchanges. This has led to visual audience gatekeeping whereby users act as audience gatekeepers by selectively disseminating visual content, thus shaping information diffusion. While this democratisation of gatekeeping holds considerable promise for user empowerment, it also presents risks. These risks stem from the inherently persuasive yet manipulative qualities of visual content, compounded by users' susceptibility to unconscious biases, especially during polarising events. Therefore, we critically investigated visual audience gatekeeping in the context of the Russo–Ukrainian War, specifically focusing on a Reddit subforum devoted to Russia-related discussions. We find that visual audience gatekeeping operates within a paradigm that reflects the social reality the audience embraces. Audience gatekeepers disseminate visual information both to reproduce and defend an idealised conception of this social reality. Collectively, they produce a visual echo chamber characterised by low information diversity, which, in turn, reinforces and perpetuates the incumbent paradigm. However, heightened social tensions can trigger a paradigm shift and amplify the reproduction and defence processes, increasing the potential for the diffusion of more radical and extreme visual narratives. Based on our findings, we propose a theoretical model of visual audience gatekeeping, which has important implications for research on visuals, gatekeeping and social media platforms. 相似文献
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Pádraig Carmody 《Information Technology for Development》2013,19(1):24-39
Much has been written about the impacts of new information and communication technology in Africa and its transformational socio-economic impacts. The penetration of mobile phones in particular has been particularly marked in recent years. This paper seeks to interrogate the hypothesis of transformation by examining the ways in which Africa is integrated into the global mobile phone value chain, and then the uses to which this technology is put on the continent. There is a fundamental distinction between having a knowledge economy and an information society. While mobiles are having significant, and sometimes welfare-enhancing impacts, their use is embedded in existing relations of social support, and also conflict. Consequently, their impacts are dialectical, facilitating change, but also reinforcing existing power relations. While Africa may be an information society, it is not, as yet, developing a knowledge economy. Mobile phone usage then represents a form of thin, rather than thick, integration (“thintegration”) in the global economy, which, because it does not lead to high value-added exports, does not fundamentally alter the continent's dependent position. 相似文献
14.
Social networks once being an innoxious platform for sharing pictures and thoughts among a small online community of friends has now transformed into a powerful tool of information, activism, mobilization, and sometimes abuse. Detecting true identity of social network users is an essential step for building social media an efficient channel of communication. This paper targets the microblogging service, Twitter, as the social network of choice for investigation. It has been observed that dissipation of pornographic content and promotion of followers market are actively operational on Twitter. This clearly indicates loopholes in the Twitter’s spam detection techniques. Through this work, five types of spammers-sole spammers, pornographic users, followers market merchants, fake, and compromised profiles have been identified. For the detection purpose, data of around 1 Lakh Twitter users with their 20 million tweets has been collected. Users have been classified based on trust, user and content based features using machine learning techniques such as Bayes Net, Logistic Regression, J48, Random Forest, and AdaBoostM1. The experimental results show that Random Forest classifier is able to predict spammers with an accuracy of 92.1%. Based on these initial classification results, a novel system for real-time streaming of users for spam detection has been developed. We envision that such a system should provide an indication to Twitter users about the identity of users in real-time. 相似文献
15.
Visual interface cues on many websites can influence Internet users' psychology, especially their perceptions about the site as well as its content (Sundar, 2008). Specifically, presence of commonly used interface cues (e.g., personalization, bandwagon cues) can substantially influence users' attitudes and their behavioral intentions toward websites and their content. This study examined the effect of personalization feature and bandwagon cues (i.e., star ratings, reviews) in a restaurant recommendation website, measuring (a) to what extent users positively perceive and plan on revisiting or sharing the site, and (b) to what degree users favored the recommended restaurant and plan to visit them. A 2 (personalization feature: present vs. absent) × 2 (bandwagon cues: high vs. low) between-subjects experiment showed that personalization feature and bandwagon cues increased positive perceptions and their behavioral intentions toward both the website and the recommended restaurant. Moreover, results revealed that users' perceived relevance as well as perceived novelty mediated the effects of interface cues on their attitudinal and behavioral consequences. Further, the impact of the interface cues on user psychology significantly differed as a function of the other cues. Theoretical and practical implications for future research on the effect of interface cues on user psychology are discussed. 相似文献
16.
Trevor Bench-Capon Micha? Araszkiewicz Kevin Ashley Katie Atkinson Floris Bex Filipe Borges Daniele Bourcier Paul Bourgine Jack G. Conrad Enrico Francesconi Thomas F. Gordon Guido Governatori Jochen L. Leidner David D. Lewis Ronald P. Loui L. Thorne McCarty Henry Prakken Frank Schilder Erich Schweighofer Paul Thompson Alex Tyrrell Bart Verheij Douglas N. Walton Adam Z. Wyner 《Artificial Intelligence and Law》2012,20(3):215-319
We provide a retrospective of 25?years of the International Conference on AI and Law, which was first held in 1987. Fifty papers have been selected from the thirteen conferences and each of them is described in a short subsection individually written by one of the 24 authors. These subsections attempt to place the paper discussed in the context of the development of AI and Law, while often offering some personal reactions and reflections. As a whole, the subsections build into a history of the last quarter century of the field, and provide some insights into where it has come from, where it is now, and where it might go. 相似文献
17.
The present research investigated how individual, interpersonal, and cultural variables influence positive self-presentation in online social networking. In particular, we examined the role of self-consciousness, actual-to-total Friends ratio, and culture in positive self-presentation on Facebook. A cross-sectional survey was conducted with college-age participants in the United States (n = 183) and South Korea (n = 137). Results showed that self-consciousness (public vs. private) and actual-to-total Friends ratio were not significantly associated with positive self-presentation on Facebook; however, culture showed a statistically significant association with positive self-presentation on Facebook, with the U.S. participants engaging in positive self-presentation on Facebook to a greater extent than the South Korean participants. More interestingly, culture significantly moderated the relationship between public self-consciousness and positive self-presentation as well as the relationship between actual-to-total Friends ratio and positive self-presentation. Specifically, positive self-presentation showed a significant positive association with public self-consciousness and a significant negative association with actual-to-total Friends ratio only among the South Korean participants and not among the U.S. participants. Theoretical and practical implications for understanding cross-cultural differences in self-presentation behaviors on social network sites were discussed. 相似文献
18.
《Information & Management》2022,59(2):103588
Although investors in financial markets have access to information from both mass media and social media, trading platforms that curate and provide this information have little to go by in terms of understanding the difference between these two types of media. This paper compares social media with mass media in the stock market, focusing on information coverage diversity and predictive value with respect to future stock absolute returns. Based on a study of nearly a million stock-related news articles from the Sina Finance news platform and 12.7 million stock-related social media messages from the popular Weibo platform in China, we find that social media covers less stocks than mass media, and this effect is amplified as the volume of media information increases. We find that there is some short-term predictive value from these sources, but they are different. Although mass media information coverage is more predictive than social media information coverage in a one-day horizon, it is the other way around in a two-to five-day horizon. These empirical results suggest that social media and mass media serve stock market investors differently. We draw connections to theories related to how crowds and experts differ and offer practical implications for the design of media-related IS systems. 相似文献
19.
This paper investigates the scheduling problem of physicians and medical staff in outpatient department of large hospitals with multi-branch. The large hospital has several branches and each branch has its own medical staff, while the physicians need to serve in all the branches affiliated to the hospital. In order to improve the working efficiency of physicians, each physician would be equipped with a medical staff during his working hours. The working time of physicians and medical staff have several requirements considering the satisfaction of them. The paper takes into account the demand and the available resources of the hospital, the workload of physicians and medical staff, etc. as the constraints, and the purpose is to minimize the dissatisfaction of physicians, the cost of physicians and the deviation of the frequency of physicians at work in different clinics. Then, a hybrid meta-heuristic algorithm SCA–VNS combining a Sine Cosine Algorithm (SCA) and variable neighborhood search (VNS) based on Iterated Hungarian algorithm, which is incorporated to solve the physicians and medical staff assignment, is proposed to solve this problem. Through computational experiments that available physicians and medical staff scheduling have been generated and perform better than other compared algorithms. 相似文献
20.
The purpose of this study was to determine if the use of PowerPoint as an information communication tool would enhance recall of information presented in a non-classroom field setting. We examined the effect of PowerPoint on the recall of information presented in religious sermons. Three test conditions were examined: (1) PowerPoint slides containing words only, (2) slides containing visual images only, and (3) slides containing both words and visual images, along with a control condition in which information was presented without the use of the PowerPoint slides. In addition, we tested the type of information recall: information about the slides, information about the slide content, and general recall of information from the sermon. While there were limited differences in recall based on the treatment conditions and the type of information being recalled, overall the use of the PowerPoint slides did not appear to have a significant effect on subjects’ ability to recall information. We conclude that greater effort must be made to understand the effects of PowerPoint presentations on human memory and cognition. 相似文献