References [1] Rohlfs, J., 1974. A Theory of Interdependent Demand for a Communications Service. The Bell Journal of Economics and Management Science, pp.16-37. [2] Katz, M. L., Shapiro, C., 1985. Network Externalities, Competition, and Compatibility. The American economic review vol.75, no.3, pp.424–440. [3] Economides, N., 1996. The economics of networks. International journal of industrial organization, vol.14, no.6, pp.673–699. [4] Amit, R., Zott, C., 2001. Value Creation in E-business. Strategic Management Journal,vol.22, pp.493-520. [5] Lee, S., Kim, T., Noh, Y., Lee, B., 2010. Success Factors of Platform Leadership in Web 2.0 Service Business. Service Business,vol.4, no.2, pp.89–103. [6] Davis, F. D., 1989. Perceived Usefulness, Perceived Ease of Use, and User Acceptance of Information Technology. MIS Quarterly, vol.13,no.3, pp.319–340. [7] Venkatesh, V., Morris, M. G., Davis, G. B., & Davis, F. D., 2003. User Acceptance of Information Technology: Toward a Unified View. MIS quarterly, pp.425–478. [8] Katz, M. L., Shapiro, C., 1986. Technology Adoption in the Presence of Network Externalities. The journal of political economy, pp.822–841. [9] Katz, M. L., & Shapiro, C., 1994. Systems Competition and Network Effects. The Journal of Economic Perspectives, vol.8, no.2, pp.93–115. [10] Farrell, J., & Saloner, G., 1985. Standardization, compatibility, and innovation. The RAND Journal of Economics, pp.70–83. [11] Farrell, J., Saloner, G., 1986. Installed Base and Compatibility: Innovation, Product preannouncements, and Predation. The American economic review, pp.940–955. [12] Arthur, W. B., 1989. Competing Technologies, Increasing Returns, and Lock-in by Historical Events. The economic journal, vol.99,no.394,pp.116–131. [13] Worldwide Smartphone OS share, http://www.icharts.net/chartchannel/worldwide-smartphone-os-share-2012-q1-2013-q1_m3zryyngc [Accessed on June 2013]. [14] Apple, http://www.apple.com/pr/library/2013/01/07App-Store-Tops-40-Billion-Downloads-with-Almost-Half-in-2012.html [Accessed on June 2013]. [15] Google Play, https://play.google.com/store/ [Accessed on June 2013]. [16] Windows Phone Store, http://www.windowsphone.com/en-us/store/overview [Accessed on June 2013]. [17] Blackberry World, http://appworld.blackberry.com/webstore/ [Accessed on June 2013]. [18] Hartman, R. S., Teece, D. J., 1990. Product Emulation Strategies in The Presence of Reputation Effects and Network Externalities: Some Evidence From The Minicomputer Industry. Economics of Innovation and New Technology,vol.1,no.1-2,pp.157–182. [19] Church, J., Gandal, N., 1992. Network Effects, Software Provision, and Standardization. The Journal of Industrial Economics, pp.85–103. [20] Gandal, N., 1994. Hedonic Price Indexes for Spreadsheets and an Empirical Test for Network Externalities. The RAND Journal of Economics, vol.25, no.1, pp.160–170. [21] Economides, N., Himmelberg, C., 1995. Critical Mass and Network Evolution in Telecommunications. In: Toward a competitive telecommunications industry: Selected papers from the 1994 Telecommunications Policy Research Conference. [22] Besen, S. M., Farrell, J., 1994. Choosing How to Compete: Strategies and Tactics in Standardization. The Journal of Economic Perspectives, vol.8,no.2, pp.117–131. [23] Liebowitz, S. J., Margolis, S. E., 1995. Path Dependence, Lock-in, and History. Journal of Law, Economics, & Organization, vol.11, no.1, pp.205–226. [24] Brandenburger, A.M., Stuart, H., 1996. Value-Based Business Strategy. Journal of Economics and Management Strategy,vol.5,pp.5–25. [25] Kim, H.W., Chan, H.C., and Gupta, S., 2007. Value-Based Adoption of Mobile Internet: An Empirical Investigation. Decision Support Systems, vol.43, pp.111–126. [26] Basole, R. C., Karla, J., 2012. Value Transformation in the Mobile Service Ecosystem: A Study of App Store Emergence and Growth. Service Science, vol. 4, no.1, pp.24–41. [27] Haile, N., Altmann, J., 2012. Value Creation in IT Service Platforms through Two-Sided Network Effects. In: K. Vanmechelen, J. Altmann, O. F. Rana (Eds.), Economics of Grids, Clouds, Systems, and Services, pp. 139–153. Springer Berlin Heidelberg. [28] Smedlund, A., 2012. Value Co-creation in Service Platform Business Models. Service Science, vol.4, no.1,pp.79–88. [29] Zhu, F., Iansiti, M., 2012. Entry into Platform-Based Markets. Strategic Management Journal, vol.33, no.1, pp.88–106. [30] Gawer, A., Cusumano, M.A., 2008. How Companies Become Platform Leaders. MIT Sloan Management Review, vol.49, no.2, pp.28–35. [31] Gebregiorgis, S. A., Altmann, J., 2012. IT Service Platforms: Their Value Creation Model and the Impact of Their Level of Openness on Their Adoption. TEMEP Discussion Paper 201295. [32] Kim, J., Ilon, L., Altmann, J., 2013. Adapting Smartphones as Learning Technology in a Korean University.Transactions of the SDPS, Journal of Integrated Design and Process Science.