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題名:顧客保留與社群建立之實證研究
作者:蔡顯童 引用關係
作者(外文):Hsien-Tung Tsai
校院名稱:國立臺灣大學
系所名稱:國際企業學研究所
指導教授:黃恆獎
學位類別:博士
出版日期:2007
主題關鍵詞:社群顧客忠誠度移轉障礙滿意度community-buildingconsumer loyaltyswitching barriersoverall satisfaction
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「留住顧客」一直以來都是學術界及企業界所重視的議題,許多學者認為,具有忠誠度的顧客是廠商創造競爭優勢的重要資產。在過去,相關研究的焦點,多是集中在「顧客滿意度的提昇」及「顧客移轉障礙的建立」,這兩個顧客忠誠度的驅動因子強調的是廠商與顧客互動的歷史過程。換句話說,過去的研究多是假設顧客在進行再度惠顧的決策時,主要是依據他與廠商過去的互動經驗。然而,過去的文獻忽略了「可預期的價值分享」也常是影響他要不要再度惠顧的重要因素。因此本研究提出一個新的觀點,認為消費者的再購意願會受到「可預期的價值分享」所影響。本研究以橫斷面的資料進行實證,研究結果顯示,消費者的再購意願確實會受到未來的誘因所影響;更重要的是,「消費者對廠商的認知品質」也會影響到「可預期的價值分享」、「移轉障礙」、及「滿意度」。本研究的結果不僅對學理上有所貢獻,也提供了企業界不同的行銷策略思維。
This thesis contains three essays to fill the research gaps mostly left unexplained in extant research and provide practitioners with guidelines for effectively managing customer relationships. In the first two essays, the author formulates and empirically tests conceptual frameworks that consider the antecedents of customer repurchase intentions in online settings. The author also incorporates the concept of relational orientations into the model to examine its moderating effect on the links between the drivers and repurchase intentions. To test the proposed hypotheses, the author uses structural equation modeling based on data obtained from a large online retailing store in Taiwan. The results strongly support most of the hypotheses. In the third essay, the author attempts to contribute to a better understanding of brand community participation (BCP) by addressing three important research gaps: First, the author elaborates on the dimensions of BCP and introduces a new measure of this construct. Second, the author examines the antecedents of BCP by three levels (individual-, group-, and relationship-level). Third, the author investigates the underestimated influence of BCP on firm-side outcomes (perceived legitimacy and consumer power), as well as its consumer-side consequences (word-of-mouth, imitation, and loyalty intentions). The empirical analysis is based on data collected from ten car brand communities. This study provides evidence for the proposed conceptualization of BCP and finds that the investigated antecedents account for some variance of BCP, which in turn positively affects consumer- and firm-side outcomes.
Ahearne, M., Bhattacharya, C. B., & Gruen., T. (2005). Antecedents and consequences of customer-company identification: Expanding the role of relationship marketing. Journal of Applied Psychology. 90, 574-585.
Allen, N. J., & Meyer, J. P. (1990). The measurement and antecedents of affective, continuance and normative commitment to the organization. Journal of Occupational Psychology, 63, 1-18.
Anderson, E. W., & Fornell, C. (1994). Cross-category variation in customer satisfaction and retention. Marketing Letters, 5, 19-30.
Anderson, J. C., & Gerbing, D. W. (1988). Structural equation modeling in practice: A review and recommended two-step approach. Psychological Bulletin, 103, 411-423.
Anderson, J. C., & Narus, J. A. (1990). A model of distributor firm and manufacturer firm working partnerships. Journal of Marketing, 54, 42-58.
Anderson, R. E., & Srinivasan, S. S. (2003). E-satisfaction and e-loyalty: A contingency framework. Psychology & Marketing, 20, 123-138.
Ansari, A., & Mela, C. F. (2003). E-customization. Journal of Marketing Research, 40, 131-145.
Arnould, E. J., & Price, L. L. (1993). River magic: Extraordinary experience and the extended service encounter. Journal of Consumer Research, 20, 24-45.
Arora, N., & Huber, J. (2001). Improving parameter estimates and model prediction by aggregate customization in choice experiments. Journal of Consumer Research, 28, 273-283.
Ashforth, B. E., & Mael, F. (1989). Social identity theory and the organization. Academy of Management Review, 14, 20-39.
Atuahene-Gima, K., & Li, H. (2002). When does trust matter? Antecedents and contingent effects of supervisee trust on performance in selling new products in China and the United States. Journal of Marketing, 64-81.
Babin, B. J., Darden, W. R., & Griffin, M. (1994). Work and/or fun: Measuring hedonic and utilitarian shopping. Journal of Consumer Research, 20, 644-656.
Bagozzi, R. P. (2000). On the concept of intentional social action in consumer behavior. Journal of Consumer Research, 27, 388-396.
Bagozzi, R. P., & Yi, Y. (1988). On the evaluation of structural equation models. Journal of the Academy of Marketing Science, 16, 74-94.
Bansal, H. S., Irving, P. G., & Taylor, S. F. (2004). A three-component model of customer commitment to service providers. Journal of the Academy of Marketing Science, 32, 234-250.
Bendapudi, N., & Berry, L. L. (1997). Customers'' motivations for maintaining relationships with service providers. Journal of Retailing, 73, 15–37.
Berry, D. S., & Hansen, J. S. (1996). Positive affect, negative affect, and social interaction. Journal of Personality and Social Psychology. 71, 796-809.
Bhattacharya, C. B., Rao, H., & Glynn, M. A. (1995). Understanding the bond of identification: An investigation of its correlates among art museum. Journal of Marketing. 59, 46-57.
Blattberg, R. C., & Deighton, J. M. (1996). Manage marketing by the customer equity test. Harvard Business Review, 74, 136-144.new window
Blau, P. M. (1964). Exchange and power in Social life. Willey, New York.
Bollen, K. A. (1989). Structural Equations with Latent Variables. New York: John Wiley.
Bolton, R. N., & Drew, J. H. (1991). A longitudinal analysis of the impact of service changes on customer attitudes. Journal of Marketing, 55, 1-9.
Brass, D. J., Galaskiewicz, J., Greve, H. R., & Tsai, W. (2004). Taking stock of networks and organizations: A multilevel perspective. Academy of Management Journal, 47, 795-817.
Brown, J. J., & Reingen, P. H. (1987). Social ties and word-of-mouth referral behavior. Journal of Consumer Research, 14, 350-362.
Brown, S., Kozinets, R. V., & Sherry, Jr., J. F. (2003). Teaching old brands new tricks: Retro branding and the revival of brand meaning. Journal of Marketing, 67, 19-33.
Burnham, T. A., Frels, J. K., & Mahajan, V. (2003). Consumer switching costs: A typology, antecedents, and consequences. Journal of the Academy of Marketing Science, 31, 109-127.
Carmines, E. G., & McIver, J. P. (1981). Analyzing models with unobserved variables: Analysis of covariance structures. In G. W. Bohrnstedt & E. F. Borgatta (Eds.), Social Measurement: Current Issues. Beverly Hills, CA: Sage.
Chaudhuri, A., & Holbrook, M. B. (2001). The chain of effects from brand trust and brand affect to brand performance: The role of brand loyalty. Journal of Marketing, 65, 81-93.
Chen, P. Y., & Hitt, L. M. (2002). Measuring switching costs and the determinants of customers retention in Internet-enabled businesses: A study of the online brokerage industry. Information Systems Research, 13, 255-275.
Chin, W.W. (1998). Issues and opinion on structural equation modeling. MIS Quarterly, 22, 7-16.
Chiou, J. S. (2004). The antecedents of consumers'' loyalty toward Internet Service Providers. Information & Management, 41, 685-695.
Chiou, J. S., Droge, C., & Hanvanich, S. (2002). Does customer knowledge affect how loyalty is formed? Journal of Service Research, 5, 113 -124.
Churchill Jr., G. A. (1979). A paradigm for developing better measures of marketing constructs. Journal of Marketing Research, 16, 64–73.
Crosby, L. A., & Stephens, N. (1987). Effects of relationship marketing on satisfaction, retention, and prices in the life insurance industry. Journal of Marketing Research, 24, 404-412.
Das, T. K., & Teng, B. S. (1998). Between trust and control: Developing confidence in partner cooperation in alliances. Academy of Management Review, 23, 491-512.
Dellaert, B. G. C., & Stremersch, S. (2005). Marketing mass-customized products: Striking a balance between utility and complexity. Journal of Marketing Research, 42, 219-227.
Devaraj, S., Fan, M., & Kohli, R. (2002). Antecedents of B2C channel satisfaction and preference: Validation e-commerce metrics. Information Systems Research, 13, 316-334.
Dewan, R., Jing, B., & Seidmann, A. (2003). Product customization and price competition on the Internet. Management Science, 49, 1055-1070.
Dholakia, U. M., Bagozzi, R. P., & Pearo, L. K. (2004). A social influence model of consumer participation in network- and small-group-based virtual communities. International Journal of Research in Marketing, 21, 241-263.
DiMaggio, P. J., & Powell, W. W. (1983). The iron cage revisited: Institutional isomorphism and collective rationality in organizational fields. American Sociological Review, 48, 147-160.
Doney, P. M., Cannon, J. P., & Mullen, M.R. (1998). Understanding the influence of national culture on the development of trust. Academy of Management Review, 23, 601-620.
Doney, P. M., Cannon, J. P. (1997). An examination of the nature of trust in buyer-seller relationships. Journal of Marketing, 61, 35-51.
Dutton, J., Dukerich, J., & Harquail, C. (1994). Organizational images and member identification. Administrative Science Quarterly, 39, 239-263.
Ekeh, P. P. (1974). Social exchange theory: The two traditions. Cambridge, MA:Harvard University Press.
El-Ansary, A. I., & Stern, L. W. (1972). Power measurement in the distribution channel. Journal of Marketing Research, 9, 47-52.
Elsbach, K. D. (1994). Managing organizational legitimacy in the California cattle. Administrative Science Quarterly, 39, 57-88.
Emerson, R. M. (1962). Power-dependence relations. American Sociological Review, 27, 31-41.
Fisher,R. J., Maltz, E., & Jaworski, B. J. (1997). Enhancing communication between marketing and engineering: The moderating role of relative functional identification. Journal of Marketing, 61 , 54-70.
Fournier, S. (1998). Consumers and their brands: Developing relationship theory in consumer research. Journal of Consumer Research, 24, 343-373.
Ganesan, S. (1994). Determinants of long-term orientation in buyer-seller relationships. Journal of Marketing, 58, 1-19.
Garbarino, E., & Johnson, M. S. (1999). The different roles of satisfaction, trust, and commitment in customer relationships. Journal of Marketing, 63, 70-87.
Gefen, D., Karahanna, E., & Straub, D. W. (2003). Trust and TAM in online shopping: An integrated model. MIS Quarterly, 27, 51-90.
Gerbing, D. W., Anderson, J. C. (1988). An updated paradigm for scale development incorporating unidimensionality and its assessment. Journal of Marketing Research, 25, 186–192.
Gilly, M. C., & Gelb, B. D. (1982). Post-purchase consumer processes and the complaining consumer. Journal of Consumer Research, 9, 323-329.
Gruen,T. W., Summers, J. O., & Acito, F. (2000). Relationship marketing activities, commitment, and membership behaviors in professional associations. Journal of Marketing, 64, 34-49.
Guiltinan, J. P. (1989). A classification of switching costs with implications for relationship marketing. T. L. Childers, R. P. Bagozzi, J.P. Peter (Eds.), 1989 AMA Winter Educators'' Conference: Marketing Theory and Practice, American Marketing Association, Chicago, pp. 216-220.
Gwinner, K. P., Gremler, D. D., & Bitner, M. J. (1998). Relational benefits in services industries: The customer''s perspective. Journal of the Academy of Marketing Science, 26, 101-114.
Harris, L. C., & Goode, M. M. H. (2004). The four levels of loyalty and the pivotal role of trust: A study of online service dynamics. Journal of Retailing, 80, 139–158.
Hawley, A. (1963). Community power and urban renewal success. American Journal of Sociology, 68, 422–431.
Heide, J. B., & Miner, A. S. (1992). The shadow of the future: Effects of anticipated interaction and frequency of contact on buyer-seller cooperation. Academy of Management Journal, 35, 265- 292.
Heide, J. B., & John, G. (1988). The role of dependence balancing in safeguarding transaction-specific assets in conventional channels. Journal of Marketing, 52, 20-35.
Homans, G. C. (1958). Social behavior as exchange. American Journal of Sciology, 63, 597-606.
Hsu, C. L., & Lu, H. P. (2004). Why do people play on-line games? An extended TAM with social influences and flow experience. Information & Management, 41, 853-868.
Hunt, S. D., & Nevin, J. R. (1974). Power in a channel of distribution: Sources and consequences. Journal of Marketing Research, 11, 186-193.
Inkeles, A. (1969). Participant citizenship in six developing countries. American Political Science Review, 63, 1120-1141.
Jackson, B. B. (1985). Winning and keeping industrial customers. Lexington, MA: Lexington Books.
Jones, M. A., Mothersbaugh, D. L., & Beatty, S. E. (2000). Switching barriers and repurchase intentions in services. Journal of Retailing, 76, 259-274.
Jupiter Research. (2004). Market forecast: U.S. retail 2004-2008. Retrieved September 27, 2004, from http://www.jupitermedia.com/corporate/releases/04.01.20-newjupresearch.html.
Kale, S. H., & Barnes, J. W. (1992). Understanding the domain of cross-national buyer-seller interactions. Journal of International Business Studies, 23, 101-132.
Kates, S. M. (2004). The dynamics of brand legitimacy: An interpretive study in the gay men''s community. Journal of Consumer Research, 31, 455-464.
Katz, L. K., & Shapiro, C. (1986). Technology adoption in the presence of network externalities. Journal of Political Economy, 94, 822-841.
Kenny, D. A. (1975). Cross-lagged panel correlation: A test for spuriousness. Psychological Bulletin, 82, 887-903.new window
Klein, J. G., Smith, N. C., & John, A. (2004). Why we boycott: Consumer motivations for boycott participation. Journal of Marketing, 68, 92-109.
Koufaris, M. (2002). Applying the technology acceptance model and flow theory to online consumer behavior. Information Systems Research, 13, 205-224.
Kozinets, R. V. (2002). The field behind the screen: Using netnography for marketing research in online communities. Journal of Marketing Research, 39, 61-72.
Lai, V.-S., & Li, H. (2005). Technology acceptance model for internet banking: An invariance analysis. Information & Management, 42, 373-386.
Lam, S. Y., Shankar, V., Erramilli, M. K., & Murthy, B. (2004). Customer value, satisfaction, loyalty, and switching costs: An illustration from a business-to-business service context. Journal of the Academy of Marketing Science, 32, 293-311.
Lemon, K. N., White, T. B., & Winer, R. S. (2002). Dynamic customer relationship management: Incorporating future considerations into the service retention decision. Journal of Marketing, 66, 1-14.
Lucas, R. E., Diener, E., Grob, A., Suh, E. M., & Shao, L. (2000). Cross-cultural evidence for the fundamental features of extraversion. Journal of Personality and Social Psychology, 79, 452-468.
Lusch, R. F., & Brown, J. R. (1982). A modified model of power in the marketing channel. Journal of Marketing Research. 19, 312-323.
Macneil, I. R. (1980). The new social contract: An inquiry into modern contractual relations. New Haven, CT: Yale University Press.
Mael, F., & Ashforth, B. E. (1992). Alumni and their alma mater: A partial test of the reformulated model of organizational identification. Journal of Organizational Behavior, 13, 103-123.new window
Market Intelligence Center. (2004). The Annal of the Electronic Commerce in Taiwan. Retrieved September 12, 2004, from http://mic.iii.org.tw/intelligence/reports/
Markus M. L. (1990). Toward a critical mass theory of interactive media. In Organizations and Communication Technology (Fulk J and Steinfield C, Eds), pp 194–218. Sage, Newbury Park, California.
Mayer, R. C., Davis, J. H., & Schoorman, F. D. (1995). An integrative model of organizational trust. Academy of Management Review, 20, 709-734.
McAlexander, J. H., Schouten, J. W., & Koening, H. F. (2002). Building brand community. Journal of Marketing, 66, 38-54.
McCutcheon, D.M., Raturi, A.S., & Meredith, J. R. (1994). The customization-responsiveness squeeze. Sloan Management Review, 35, 89-99.
McKinney, V., Yoon, K., & Zahedi, F. (2002). The measurement of Web-customer satisfaction: an expectation and disconfirmation approach. Information Systems Research, 13, 296-316.
Mehra, A., Kilduff, M., & Brass, D. J. (2001). The social networks of high and low self-monitors: Implications for workplace performace. Administrative Science Quarterly, 46, 121-149.
Menon, A., Varadarajan, P. R. (1992). A model of marketing knowledge use within firms. Journal of Marketing, 56, 53-71.
Milton, L. P., & Westphal, J. D. (2005). Identity confirmation networks and cooperation in work groups. Academy of Management Journal. 48, 191-212.
Mittal, B. (1994). An integrated framework for relating diverse consumer characteristics to supermarket coupon redemption. Journal of Marketing Research, 31, 533-544.
Mohr, J. J., Fisher, R. J., Nevin, J. R. (1996). Collaborative communication in interfirm relationships: Moderating effects of integration and control. Journal of Marketing, 60, 103-115.
Moorman, C. (1995). Organizational market information processes: Cultural antecedents and new product outcomes. Journal of Marketing Research, 32, 318-335.
Morgan, R. M., & Hunt, S. D. (1994). The commitment-trust theory of relationship marketing. Journal of Marketing, 58, 20-38.
Muniz, A. M., Jr., & O''Guinn T. C. (2001). Brand community. Journal of Consumer Research, 27, 412-432.
Oliver, P. E., Marwell, G. (1988). The paradox of group size in collective action: A theory of the critical mass. II. American Sociological Review, 53, 1-8.
Oliver, P., Marwell, G., & Teixeira, R. (1985). A theory of the critical mass: Interdependence, group heterogeneity, and the production of collective goods. American Journal of Sociology, 91, 522-556.
Oliver, R. L. (1999). Whence consumer loyalty. Journal of Marketing, 63, 33–44.
Oliver, R. L., Rust, R. T., & Varki, S. (1997). Customer delight: Foundations, findings, and managerial insight. Journal of Retailing, 73, 311-336.
Oliver, R.L., (1980). A cognitive model of the antecedents and consequences of satisfaction decisions. Journal of Marketing Research, 17, 460-469.
Organ, D. W., (1988). Organizational citizenship behavior: The good soldier syndrome. Lexington, MA: Lexington Books.
Parasuraman, A., Zeithaml, V. A., & Malhotra, A. (2005). E-S-QUAL: A multiple-item scale for assessing electronic service quality. Journal of Service Research, 7, 213-233.
Pavlou, P. A., & Gefen, D. (2004). Building effective online marketplaces with institution-based trust. Information Systems Research, 15, 37-59.
Porter, M. E. (1980). Competitive Strategy. New York: The Free Press.
Prahalad, C. K., & Ramaswamy, V. (2000). Co-opting customer competence. Harvard Business Review, 78, 79-88.
Reichheld, F. F. (1996). Learning from customer defections. Harvard Business Review, 74, 56-68.
Reichheld, F. F., & Schefter, P. (2000). E-loyalty: your secret weapon on the Web. Harvard Business Review, 78, 105-113.
Reinartz, W., Krafft, M., & Hoyer, W. D. (2004). The customer relationship management process: Its measurement and impact on performance. Journal of Marketing Research, 41, 293-305.
Rusbult, C. E., Farrell, D., Rogers, G., & Mainous, A. G. (1988). Impact of exchange variables on exit, voice, loyalty, and neglect: An integrative model of responses to declining job satisfaction. Academy of Management Journal, 31, 599-827.
Rust, R. T., Zeithaml, V. A., & Lemon, K. N. (2000). Driving customer equity: How customer lifetime value is reshaping corporate strategy. New York: The Free Press.
Sarkar, M. B., Echambadi, R., Cavusgil, S. T., & Aulakh, P. S. (2001). The influence of complementarity, compatibility, and relationship capital on alliance performance. Journal of the Academy of Marketing Science, 29, 358-373.
Schurr, P. H., & Ozanne, J. L. (1985). Influences on exchange processes: Buyers'' preconceptions of a seller''s trustworthiness and bargaining toughness. Journal of Consumer Research, 11, 939-953.
Scott, J., Overton, T. S. (1977). Estimating nonresponse bias in mail surveys. Journal of Marketing Research, 14, 396-402.
Scott, W. R. (1987). Organizations: Rational, natural and open systems (2nd ed.). Englewood Cliffs, NJ: Prentice Hall.
Shang, R.-A., Chen, Y.-C., & Shen, L. (2005). Extrinsic versus intrinsic motivations for consumers to shop on-line. Information & Management, 42, 401-413.
Shih, C.F., & Venkatesh, A. (2004). Beyond adoption: Development and application of a use-diffusion model. Journal of Marketing, 68, 59–72.
Simonson, I. (2005). Determinants of customers'' responses to customized offers: Conceptual framework and research propositions. Journal of Marketing, 69, 32-45.
Singh, J., & Sirdeshmukh, D. (2000). Agency and trust mechanisms in customer satisfaction and loyalty judgments. Journal of the Academy of Marketing Science, 28, 150-67.
Sirdeshmukh, D., Singh, J., Sabol, B. (2002). Consumer trust, value, and loyalty in relational exchanges. Journal of Marketing, 66, 15-37.
Srinivasan, S. S., Anderson, R., & Ponnavolu, K. (2002). Customer loyalty in e-commerce: An exploration of its antecedents and consequences. Journal of Retailing, 78, 41–50.
Suchman, M. C. (1995). Managing legitimacy: Strategic and institutional approaches. Academy of Management Review, 20, 571-610.
Szmigin, I., & Reppel, A. E. (2004). Internet community bonding: The case of macnews.de. European Journal of Marketing, 38, 626-640.
Szymanski, D. M., & Hise, R. T. (2000). E-Satisfaction: An initial examination. Journal of Retailing, 76, 309-322.
Szymanski, D. M., & Henard, D. H. (2001). Customer satisfaction: A meta-analysis of empirical evidence. Journal of the Academy of Marketing Science, 29, 16-35.
Szymanski, D. M., & Hise R. T. (2000). e-Satisfaction: An initial examination. Journal of Retailing, 76, 309-322.
Tamir, M., Clore, G. L., & Robinson, M. D. (2002). The epistemic benefits of trait-consistent mood states: An analysis of extraversion and mood. Journal of Personality and Social Psychology, 83, 663-677.
Taylor, S. F., & Todd, P. A. (1995). Understanding information technology usage: A test of competing models. Information Systems Research, 6, 144-176.new window
Truman, G. E., Sandoe, K., & Rifkin, T. (2003). An empirical study of smart card technology. Information & Management, 40, 591-606.
Uehara, E. (1990). Dual exchange theory, social networks, and informal social support. American Journal of Sociology, 96, 521-557.
Von Dras, D. D., & Siegler, I. C. (1997). Stability in extraversion and aspects of social support at midlife. Journal of Personality and Social Psychology, 72, 233-241.
Wathne, K. H., Biong, H., & Heide, J. B. (2001). Choice of supplier in embedded markets: Relationship and marketing program effects. Journal of Marketing, 65, 54-67.
Watson, R. T., Akselsen, S., & Pitt, L. F. (1998). Attractors: Building mountains in the flat landscape of the World Wide Web. California Management Review, 40, 36-56.
Weiner, B. (1986). An attribution theory of motivation and emotion, Springer-Verlag, New York.
Westphal, J. D., Seidel, M. D. L., & Stewart, K. J. (2001). Second-order imitation: Uncovering latent effects of board network ties. Administrative Science Quarterly, 46, 717-747.
Wicks, A. C., Berman, S. L., & Jones, T. M. (1999). The structure of optimal trust: Moral and strategic implications. Academy of Management Review, 24, 99-116.
Winer, R. S. (2001). A framework for customer relationship management. California Management Review, 43, 89-107.
Zeithaml, V. A., Berry, L. L., Parasuraman, A. (1988). Communication and control processes in the delivery of service quality. Journal of Marketing, 52, 35-48.
Zhou, K. Z., Yim, C. K., Tse, D. K. (2005). The effects of strategic orientations on technology- and market-based breakthrough innovations. Journal of Marketing, 69, 42-60.
Zimmerman, M. A., & Zeitz, G. J. (2002). Beyond survival: Achieving new venture growth by building legitimacy. Academy of Management Review, 27, 414-431.
 
 
 
 
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