References [1] Demirkan, H.et al., 2008. Service-oriented technology and management: perspectives on research and practice for the coming decade. Electronic Commerce Research and Applications 7, 356–376. [2] Katz, Michael L., Shapiro, Carl, 1995. Network externalities, competition, and compatibility. The American Economic Review 75( 3),424–440. [3] Liebowitz, S. J., Margolis, S. E.: Network externality: An uncommon tragedy. The Journal of Economic Perspectives 8(2), 133–150(1994). [4] Farrell, J., Saloner, G., 1985. Standardization, compatibility, and innovation. Rand Journal 16, 70-83. [5] Farrell, J., Saloner, G., 1986. Installed base and compatibility: Innovation, product preannouncements, and predation. The American Economic Review, 940–955. [6] Farrell, J., Saloner,G., 1988. Coordination through committees and markets. The RAND Journal of Economics 235–252. [7] Farrell, J., Saloner, G., 1992. Converters, compatibility, and the control of interfaces. The Journal of Industrial Economics,9–35. [8] Clements, M. T., 2004. Direct and indirect network effects: are they equivalent? International Journal of Industrial Organization 22(5), 633–645. [9] Economides, N., Flyer, F., 1997. Compatibility and Market Structure for Network Goods. Stern School of Business. Department of Economics Working Paper Series. [10] Katz, Michael L., Shapiro, Carl: Technology adoption in the presence of network externalities. Journal of Political Economy 94, 822–841(1986). [11] Basole, R. C., Karla, J., 2012. Value transformation in the mobile service ecosystem: A Study of App Store Emergence and Growth. Service Science, 4(1), 24–41. [12] Bieberstein, N., Bose, S., Fiammante, M., Jones, K., Shah, R., 2005. Service-oriented architecture(SOA) compass: business value, planning, and enterprise roadmap. FT Press, Upper Saddle River NJ. [13] Amit, R., Zott, C., 2001. Value creation in e-business. Strategic Management Journal 22, 493-520. [14] Lee, S., Kim, T., Noh, Y., Lee, B., 2010. Success factors of platform leadership in web 2.0 service business. Service Business 4(2), 89–103. [15] Smedlund, A., 2012. Value co-creation in service platform business models. Service Science 4(1),79–88. [16] Iansiti, M.,Levien, R, 2004. Strategy as ecology. Harvard Business Review 82(3), 68– 81. [17] Gawer, A., Cusumano, M. A., 2008. How companies become platform leaders. MIT Sloan management review 49(2), 28–35. [18] Agarwala, S., Yuan Chen, Milojicic, D., Schwan, K., 2006. QoS and utility aware monitoring in Enterprise Systems. IEEE, 124–133. [19] Evans, D. S., 2003. Some Empirical aspects of multi-sided platform industries. SSRN Electronic Journal. [20] Katz, Michael L., Shapiro, Carl, 1992. Product introduction with network externalities. Journal of Industrial Economics 40(1),55–84. [21] Katz, Michael L., Shapiro, Carl, 1994. Systems competition and network effects. Journal of Economic Perspectives 8(2), 93–115. [22] Eisenmann, T., Parker, G.,VanAlstyne, M.W., 2006. Strategies for two-sided markets. Harvard Business Review 84(10),92. [23] Zhu, F., Iansiti, M.: Entry into platform-based markets. Strategic Management Journal 33,88–106(2012). [24] Nalebuff, B. J., Brandenburger, A. M., 1997. Co-opetition: competitive and cooperative business strategies for the digital economy. Strategy & Leadership 25, 28–35. [25] Gebregiorgis, S. A., Altmann, J., 2012. IT service platforms: Their value creation model and the impact of their level of openness on their adoption. SRII 2012, Annual SRII Global Conference. San Jose, California, USA. [26] Kim. K., Altmann, J., Hwang, J., 2011. An analysis of the openness of the Web2.0 service network using two sets of indices for measuring the impact of service ownership. HICSS44, Hawaii International Conference on Systems Science, Koloa, Hawaii, USA. [27] Kim, K., Altmann, J., Hwang, J., 2010. Measuring and analyzing the openness of the Web2.0 service network for improving the innovation capacity of the Web2.0 system through collective intelligence. COLLIN 2010, Symposium on Collective Intelligence, Springer Advances in Intelligent and Soft Computing, Hagen, Germany. [28] Altmann, J., Ion, M., Bany Mohammed, A., 2007. Taxonomy of Grid business models. GECON 2007, Workshop on Grid Economics and Business Models, Springer LNCS, Rennes, France. [29] Apple iTunes, 2012. http://www.apple.com/itunes, accessed October 2012. [30] Apple Development Kits, 2012. https://developer.apple.com/programs/ios/, accessed October 2012. [31] Amazon Appstore for Android, 2012. http://www.amazon.com/mobile- apps/b/ref=sa_menu_mas2?ie=UTF8&node=2350149011, accessed October 2012. [32] Google Apps Marketplace, 2012. http://www.google.com/enterprise/marketplace/, accessed October 2012.