Lessons learned from applying social network analysis on an industrial Free/Libre/Open Source Software ecosystem

Journal of Internet Services and Applications

Volumn 6, Issue 1, 2015, Pages

  Teixeira, Jose ^a   Robles, Gregorio ^b,c   González Barahona, Jesús M ^b,c  

^a UNIVERSITY OF TURKU   (Finland)

^b UNIVERSIDAD REY JUAN CARLOS   (Spain)

^c Bitergia SL   (Spain)

Author keywords

Business models; Cloud computing; Homophily; Open source; Open coopetition; OpenStack; Social network analysis; Software ecosystems

Indexed keywords

BIG DATA; CLOUD COMPUTING; COMPETITION; COMPLEX NETWORKS; DISTRIBUTED COMPUTER SYSTEMS; ECOLOGY; ECOSYSTEMS; MOBILE DEVICES; OPEN SYSTEMS; SOCIAL NETWORKING (ONLINE); SOCIAL SCIENCES COMPUTING; SOFTWARE DESIGN; SOFTWARE ENGINEERING;

BUSINESS MODELS; CO-OPETITION; HOMOPHILY; OPEN SOURCES; OPENSTACK; SOFTWARE ECOSYSTEMS;

OPEN SOURCE SOFTWARE;

EID: 84939234078     PISSN: 18674828     EISSN: 18690238     Source Type: Journal    
DOI: 10.1186/s13174-015-0028-2     Document Type: Article

References (155)

1. Dagnino GB, Padula G (2002) Coopetition strategy: a new kind of interfirm dynamics for value creation In: Innovative research in management, European Academy of Management (EURAM), second annual conference, Stockholm, May.
2. Bengtsson M, Kock S (2000) “Coopetition” in business networks—to cooperate and compete simultaneously. Ind Mark Manag 29(5): 411–426.
3. Teixeira J, Lin T (2014) Collaboration in the open-source arena: the webkit case In: Proceedings of the 52nd ACM conference on computers and people research, 121–129. ACM.
4. Gnyawali DR, Madhavan R (2001) Cooperative networks and competitive dynamics: a structural embeddedness perspective. Acad Manag Rev 26(3): 431–445.
5. Gnyawali DR, Park B-JR (2009) Coopetition and technological innovation in small and medium sized enterprises: a multilevel conceptual model. J Small Bus Manag 47(3): 308–330.
6. Lado AA, Boyd NG, Hanlon SC (1997) Competition, cooperation, and the search for economic rents: a syncretic model. Acad Manag Rev 22(1): 110–141.
7. Nalebuff BJ, Brandenburger A (1996) Co-opetition. HarperCollinsBusiness, NYC, USA.
8. Messerschmitt DG, Szyperski C (1979) Software ecosystems: understanding an indispensable technology and industry. 2003. The MIT Press, Cambridge.
9. Jansen S, Finkelstein A, Brinkkemper S (2009) A sense of community: a research agenda for software ecosystems In: Proceedings of 31st International Conference on Software Engineering (ICSE’09), 187–190. IEEE Computer Society, Vancouver, Canada.
10. Yin RK (2011) Applications of case study research. Sage, London, UK.
11. Runeson P, Höst M (2008) Guidelines for conducting and reporting case study research in software engineering. Empir Softw Eng 14(2): 131–164.
12. Jick TDMixing qualitative and quantitative methods: triangulation in action. Adm Sci Q: 602–611.
13. Johnson RB, Onwuegbuzie AJ, Turner LA (2007) Toward a definition of mixed methods research. J Mixed Methods Res 1(2): 112–133.
14. Basole RC (2009) Visualization of interfirm relations in a converging mobile ecosystem. J Inf Technol 24(2): 144–159.
15. Brandenburger AM, Stuart HW (1996) Value based business strategy. J Econ Manag Strateg 5(1): 5–24.
16. Tidström A (2009) Causes of conflict in intercompetitor cooperation. J Bus Ind Mark 24(7): 506–518.
17. Deeds DL, Hill CW (1996) Strategic alliances and the rate of new product development: an empirical study of entrepreneurial biotechnology firms. J Bus Ventur 11(1): 41–55.
18. Lynn GS, Akgün AE (1998) Innovation strategies under uncertainty: a contingency approach for new product development. Eng Manag J 10: 11–18.
19. Garud R (1994) Cooperative and competitive behaviors during the process of creative destruction. Res Policy 23(4): 385–394.
20. Gomes-Casseres B (1994) Group vs. group: How alliance networks compete. Harv Bus Rev 72(4): 62–76.
21. Osarenkhoe A (2010) A coopetition strategy–a study of inter-firm dynamics between competition and cooperation. Bus Strateg Ser 11(6): 343–362.
22. Huang KF, Yu C-MJ (2011) The effect of competitive and non-competitive r&d collaboration on firm innovation. J Technol Transf 36(4): 383–403.
23. Fernandez AS, Le Roy F, Gnyawali DR (2014) Sources and management of tension in co-opetition case evidence from telecommunications satellites manufacturing in europe. Ind Mark Manag 43(2): 222–235.
24. Park B-JR, Srivastava MK, Gnyawali DR (2014) Walking the tight rope of coopetition: Impact of competition and cooperation intensities and balance on firm innovation performance. Ind Mark Manag 43(2): 210–221.
25. Iansiti M, Levien R (2004) Strategy as ecology. Harv Bus Rev 82(3): 68–81.
26. Iansiti M, Levien R (2004) The keystone advantage: what the new dynamics of business ecosystems mean for strategy, innovation, and sustainability. Harvard Business Press, Boston.
27. Jansen S, Finkelstein A, Brinkkemper S (2009) A sense of community: a research agenda for software ecosystems In: Software Engineering-Companion Volume, 2009. ICSE-Companion 2009. 31st International Conference On, 187–190. IEEE.
28. Bosch J (2009) From software product lines to software ecosystems In: Proceedings of the 13th international software product line conference, 111–119. Carnegie Mellon University.
29. Yilmaz M, O’Connor RV (2011) A software process engineering approach to improving software team productivity using socioeconomic mechanism design. ACM SIGSOFT Softw Eng Notes 36(5): 1–5.
30. Hanssen GK, Dybå T (2012) Theoretical foundations of software ecosystems In: IWSECO@ ICSOB, 6–17. Citeseer.
31. Von Hippel E (2005) Democratizing innovation. MIT press, Massachusetts.
32. Scacchi W, Feller J, Fitzgerald B, Hissam S, Lakhani K (2006) Understanding free/open source software development processes. Softw Process Improv Pract 11(2): 95–105.
33. Teixeira J, Lin T (2014) Collaboration in the open-source arena: The WebKit case In: Proceedings of the 52th ACM SIGMIS conference on computers and people research, Singapore.
34. McPherson M, Smith-Lovin L, Cook JM (2001) Birds of a feather: homophily in social networks. Annu Rev Sociol: 415–444.
35. Monge PR, Contractor NS (2001) Emergence of communication networks. The new handbook of organizational communication: Advances in theory, research, and methods. Sage, Thousand Oaks, CA.
36. Nohria N (1994) Networks and organizations: structure, form and action. Harvard Business School Press, Boston, MA.
37. Brass DJ (1995) A social network perspective on human resources management. Res Pers Hum Resour Manag 13(1): 39–79.
38. Jiang Y, Bolnick DI, Kirkpatrick M (2013) Assortative mating in animals. Am Nat 181(6): 125–138.
39. Gulati R, Gargiulo M (1999) Where do interorganizational networks come from?Am J Soc 104(5): 1439–1493.
40. Madhavan R, Gnyawali DR, He J (2004) Two’s company, three’s a crowd? Triads in cooperative-competitive networks. Acad Manag J 47(6): 918–927.
41. Aldrich HE, Kim PH (2007) Small worlds, infinite possibilities? how social networks affect entrepreneurial team formation and search. Strateg Entrep J 1(1–2): 147–165.
42. Acker J (2006) Inequality regimes gender, class, and race in organizations. Gend Soc 20(4): 441–464.
43. Etzkowitz H, Kemelgor C, Uzzi B (2000) Athena unbound: the advancement of women in science and technology. Cambridge University Press.
44. Rogers EM (2010) Diffusion of innovations. Simon and Schuster, NYC.
45. Dyba T (2000) An instrument for measuring the key factors of success in software process improvement. Empir Softw Eng 5(4): 357–390.
46. Sjoberg DI, Anda B, Arisholm E, Dyba T, Jorgensen M, Karahasanovic A, Koren EF, Vokác M (2002) Conducting realistic experiments in software engineering In: Empirical Software Engineering, 2002. Proceedings. 2002 International Symposium N, 17–26. IEEE.
47. Hovorka DS, Larsen KR (2006) Enabling agile adoption practices through network organizations. Eur J Inf Syst 15(2): 159–168.
48. 451Research (2014) 451 Research’s new OpenStack Market Monitor service predicts a $1.7bn+ market by 2016. https://451research.com/report-short?entityId=82593
49. Baker J (2014) OpenStack by the numbers | Opensource.com. OpenStack by the numbers Accessed 15 Oct 2014.
50. Benbasat I, Goldstein DK, Mead M (1987) The case research strategy in studies of information systems. MIS Q: 369–386.
51. Lee AS (1989) A scientific methodology for mis case studies. MIS Q: 33–50.
52. Flynn BB, Sakakibara S, Schroeder RG, Bates KA, Flynn EJ (1990) Empirical research methods in operations management. J Oper Manag 9(2): 250–284.
53. Wasserman S, Faust K (1994) Social network analysis: methods and applications vol. 8. Cambridge University Press, Cambridge.
54. Scott J (2012) Social network analysis. SAGE Publications Limited, London.
55. Brandes U, Robins G, McCranie A, Wasserman S (2013) What is network science?Network Sci 1(01): 1–15.
56. Bastian M, Heymann S, Jacomy M, et al (2009) Gephi: an open source software for exploring and manipulating networks. ICWSM 8: 361–362.
57. Handcock MS, Hunter DR, Butts CT, Goodreau SM, Morris M (2003) Statnet: Software Tools for the Statistical Modeling of Network Data, Seattle, WA. http://statnetproject.org
58. Butts CT (2010) Tools for social network analysis. R package version 2.
59. R Core Team (2014) R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing, Vienna, Austria. R Foundation for Statistical Computing. http://www.R-project.org
60. Porter K, Whittington KB, Powell WW (2005) The institutional embeddedness of high-tech regions: relational foundations of the Boston biotechnology community. Clusters Netw innov 261: 296.
61. Elias N (1978) What is sociology?. Columbia University Press, NYC.
62. Newton T (2001) Organization: the relevance and the limitations of elias. Organization 8(3): 467–495.
63. Gfaller GR (1993) Figuration’: the contribution of norbert elias to group analysis and the contribution of group analysis to the social sciences. Group Anal 26(3): 341–356.
64. Crowston K, Howison J (2005) First Monday10: 2–7. http://firstmonday.org/ojs/index.php/fm/article/view/1207
65. Bird C, Pattison D, D’Souza R, Filkov V, Devanbu P (2008) Latent social structure in open source projects In: Proceedings of the 16th ACM SIGSOFT international symposium on foundations of software engineering, 24–35. ACM.
66. Geipel MM, Schweitzer F (2012) The link between dependency and cochange: Empirical evidence. IEEE Trans Softw Eng 38(6): 1432–1444.
67. Zanetti MS, Scholtes I, Tessone CJ, Schweitzer F (2013) Categorizing bugs with social networks: a case study on four open source software communities In: Software Engineering (ICSE), 2013 35th international conference on, 1032–1041.
68. Freeman LC (2005) Graphic techniques for exploring social network data. Models and methods in social network analysis: 248–269.
69. Runeson P, Host M, Rainer A, Regnell B (2012) Case study research in software engineering: guidelines and examples. Wiley, Hoboken, NJ.
70. Piekkari R, Welch C, Paavilainen E (2008) The case study as disciplinary convention: evidence from international business journals. SAGE Publications, London, UK.
71. Gibbert M, Ruigrok W, Wicki B (2008) What passes as a rigorous case study?Strat Manag J 29(13): 1465–1474.
72. Kozinets RV (2002) The field behind the screen: using netnography for marketing research in online communities. J Mark Res: 61–72.
73. Kozinets RV (2009) Netnography: doing ethnographic research online. Sage Publications Limited, London.
74. Bitergia Oa (2014) Dash of Development Activity | data-sources. http://activity.openstack.org/dash/browser/data_sources.html Accessed 7 Oct 2014.
75. Mirantis Oa (2014) Members of OpenStack Foundation. http://stackalytics.com/report/members?release=all&metric=members&project_type=all&company=&days=93. Accessed 7 Oct 2014.
76. OpenStack (2015) Releases - OpenStack Wiki. https://wiki.openstack.org/wiki/Releases. Accessed 12 Feb 2015.
77. OpenStack (2015) Developers training guide - OpenStack Docs. http://docs.openstack.org/training-guides/content/developer-getting-started.html. Accessed 12 Feb 2015.
78. OpenStack (2015) Release Cycle - OpenStack Wiki. https://wiki.openstack.org/wiki/Release_Cycle. Accessed 24 Apr 2015.
79. OpenStack (2015) Branch Model - OpenStack - OpenStack Wiki. https://wiki.openstack.org/wiki/Branch_Model Accessed 24 Apr 2015.
80. OpenStack (2015) FeatureFreeze - OpenStack - OpenStack Wiki. https://wiki.openstack.org/wiki/FeatureFreeze Accessed 24 Apr 2015.
81. OpenStack (2014) Roadmap OpenStack Open Source Cloud Computing Software. https://www.openstack.org/software/roadmap/. Accessed 7 Oct 2014.
82. Bitergia (2014) OpenStack releases reports. http://bitergia.com/openstack-releases-reports/ Accessed 7 Oct 2014.
83. Mockus A, Fielding RT, Herbsleb JD (2002) Two case studies of open source software development: apache and mozilla. ACM Trans Softw Eng Methodol 11(3): 309–346.
84. Masmoudi H, den Besten M, De Loupy C, Dalle JM (2009) Peeling the onion In: Open source ecosystems: diverse communities interacting, 284–297. Springer, NYC.
85. Ruhnau B (2000) Eigenvector-centrality—a node-centrality?Soc Networks 22(4): 357–365.
86. Bonacich P (2007) Some unique properties of eigenvector centrality. Soc Networks 29(4): 555–564.
87. Albert R, Barabási AL (2002) Statistical mechanics of complex networks. Rev Mod Phys 74(1): 47.
88. Granovetter MS (1973) The strength of weak ties. Am J Sociol: 1360–1380.
89. Bhattacharya D, Ram S (2012) Sharing news articles using 140 characters: a diffusion analysis on twitter In: Proceedings of the 2012 international conference on Advances in Social Networks Analysis and Mining (ASONAM 2012), 966–971. IEEE Computer Society.
90. Brandes U, Wagner D (2004) Analysis and visualization of social networks In: Graph drawing software, 321–340. Springer, NYC.
91. Girvan M, Newman ME (2002) Community structure in social and biological networks. Proc Natl Acad Sci 99(12): 7821–7826.
92. Blondel VD, Guillaume JL, Lambiotte R, Lefebvre E (2008) Fast unfolding of communities in large networks. J Stat Mech Theory Experiment 2008(10): 10008.
93. Eisenhardt KM (1991) Better stories and better constructs: the case for rigor and comparative logic. Acad Manag Rev 16(3): 620–627.
94. Dyer WG, Wilkins AL (1991) Better stories, not better constructs, to generate better theory: a rejoinder to eisenhardt. Acad Manag Rev 16(3): 613–619.
95. Rossi B, Russo B, Succi G (2009) Analysis of open source software development iterations by means of burst detection techniques In: Open source ecosystems: diverse communities interacting, 83–93. Springer.
96. Michlmayr M, Fitzgerald B, Stol KJ (2015) Why and how should open source projects adopt time-based releases?IEEE Softw 32(2): 55–63.
97. OpenStack (2015) OpenStack Specifications. http://specs.openstack.org/. Accessed 24 Apr 2015.
98. OpenStack (2014) Blueprints - OpenStack - OpenStack Wiki. https://wiki.openstack.org/wiki/Blueprints Accessed 24 Apr 2015.
99. OpenStack (2015) OpenStack Developer’s Guide. http://docs.openstack.org/infra/manual/developers.html Accessed 24 Apr 2015.
100. Ltd CG (2014) Launchpad. https://launchpad.net/ Accessed 18 Jun 2014.
101. OpenStack (2015) BugTriage - OpenStack - OpenStack Wiki. https://wiki.openstack.org/wiki/BugTriage Accessed 24 Apr 2015.
102. OpenStack (2015) Bugs - OpenStack - OpenStack Wiki. https://wiki.openstack.org/wiki/Bugs. Accessed 24 Apr 2015.
103. Curry J (2010) Introducing OpenStack | The OpenStack Blog. http://www.openstack.org/blog/2010/07/introducing-openstack/. Accessed 19 Jul 2010.
104. Scott J (2012) What is social network analysis? What Is.. ? Series. Bloomsbury Academic. https://books.google.fi/books?id=rWBMAQAAQBAJ
105. Krempel L (2009) Network visualization. Handbook of Social Network Analysis. Sage, London, UK.
106. Bertin J, Berg WJ (2011) Semiology of Graphics: Diagrams, Networks, Maps ESRI Press. ISBN=9781589482616, LCCN=2010031657.
107. Rackspace (2010) Rackspace Open Sources Cloud Platform; Announces Plans to Collaborate with NASA and Other Industry Leaders on OpenStack Project. http://www.rackspace.com/blog/newsarticles. rackspace-open-sources-cloud-platform-announces-plans-to-collaborate-with-nasa-and-other-industry-leaders-on-openstack-project/. Accessed 19 Jul 2010.
108. Crosby S (2014) If you’ve seen one redwood, you’ve seen them all.. | Citrix Blogs. http://blogs.citrix.com/2010/10/21/if-youve-seen-one-redwood-youve-seen-them-all/. Accessed 21 Oct 2010.
109. Arnold J (2011) OpenStack Object Storage Moves Beyond Rackspace | Cloudscaling. https://cloudscaling.com/blog/cloud-computing/openstack-object-storage-moves-beyond-rackspace/. Accessed 31 Jan 2011.
110. Lvov M (2011) OpenStack Deployment on Fedora using Kickstart - Pure Play OpenStack. https://www.mirantis.com/blog/openstack-deployment-on-fedora-using-kickstart/. Accessed 18 May 2011.
111. HP (2011) HP Video Gallery OpenStack Technology. http://www8.hp.com/h20621/video-gallery/us/en/events/enterprise/hp-discover-2011/2793799141001/OpenStack. %20Technology/video/. Accessed Jun 2011.
112. Darrow B (2012) OpenStack developers leave Rackspace for Nebula — Tech News and Analysis. https://gigaom.com/2012/07/23/openstack-developers-leave-rackspace-for-nebula/. Accessed 15 Oct 2014.
113. Diaz A (2012) OpenStack: Poised to lead the way to open cloud computing - Thoughts on Cloud. http://thoughtsoncloud.com/2012/09/openstack-poised-to-lead-the-way-to-open-cloud-computing/. Accessed 19 Sept 2012.
114. Fratto M (2012) Amazon APIs Are Fine.. For Amazon - Network Computing. http://www.networkcomputing.com/cloud-infrastructure/amazon-apis-are-fine--for-amazon/a/d-id/1233527?. Accessed 4 Mar 2012.
115. Shuttleworth M (2014) Ubuntu is the leading OpenStack distribution. http://www.markshuttleworth.com/archives/1373.
116. VMware (2013) Canonical and VMware Collaborate to Enable OpenStack Clouds With VMware Technologies (NYSE:VMW). http://ir.vmware.com/releasedetail.cfm?ReleaseID=756729. Accessed 16 Apr 2013.
117. Mirantis (2013) Mirantis receives $10 million from Intel, WestSummit, and Dell. https://www.mirantis.com/company/press-center/company-news/mirantis-receives-10-million-from-intel-capital-westsummit-capital-and-dell-ventures-to-accelerate-its-openstack-game/. Accessed 10 Jan 2013.
118. Mirantis (2013) Ericsson, Red Hat, and SAP Ventures Back Mirantis with Investment - Pure Play OpenStack. https://www.mirantis.com/company/press-center/company-news/ericsson-red-hat-and-sap-ventures-back-mirantis-with-investment/. Accessed 6 Jun 2013.
119. Cureton L (2012) IT Reform at the National Aeronautics and Space Administration | NASA CIO Blog. http://blogs.nasa.gov/NASA-CIO-Blog/2012/06/09/post_1339205656611/. Accessed 15 OCt 2012.
120. O’Luanaigh C (2014) The importance of OpenStack for CERN | CERN. http://home.web.cern.ch/about/updates/2014/01/importance-openstack-cern. Accessed 5 Mar 2014.
121. Kock S (1991) A Strategic process for gaining external resources through long-lasting relationships: examples from two Finnish and two Swedish industrial firms. Swedish School of Economics and Business Administration, Umeå.
122. Bengtsson M, Kock S (2014) Coopetition—quo vadis? past accomplishments and future challenges. Ind Mark Manag 43(2): 180–188.
123. Jansen S (2014) Measuring the health of open source software ecosystems: beyond the scope of project health. Inf Softw Technol 56(11): 1508–1519.
124. Izquierdo-Cortazar D, González-Barahona JM, Robles G, Deprez JC, Auvray V (2010) Floss communities: analyzing evolvability and robustness from an industrial perspective In: Open Source Software: New Horizons, 336–341. Springer.
125. Vasilescu B, Serebrenik A, Goeminne M, Mens T (2014) On the variation and specialisation of workload — a case study of the Gnome ecosystem community. Empir Softw Eng 19(4): 955–1008.
126. HP (2013) White paper | HP and the Open Cloud. http://www.hpcloud.com/sites/default/files/Whitepaper%20-%20HP%20%20OpenStack%201_25_2013.pdf Accessed 18 Jun 2014.
127. Apple (2014) Apple - Open Source. https://www.apple.com/opensource/. Accessed 31 Oct 2014.
128. Ericsson (2014) Open source - Ericsson. http://www.ericsson.com/article/open_source_1714451213_c. Accessed 18 Jun 2014.
129. OpenStack, Mirantis (2014) Stackalytics | OpenStack community contribution in Juno release. http://www.stackalytics.com/. Accessed 18 Jun 2014.
130. Shihab E, Bird C, Zimmermann T (2012) The effect of branching strategies on software quality In: Empirical Software Engineering and Measurement (ESEM), 2012 ACM-IEEE International Symposium On, 301–310. IEEE.
131. Flyvbjerg B (2006) Five misunderstandings about case-study research. Qual Inq 12(2): 219–245.
132. Basili VR, Shull F, Lanubile F (1999) Building knowledge through families of experiments. IEEE Trans Softw Eng 25(4): 456–473.
133. Storey M-AD, Čubranić D, German DM (2005) On the use of visualization to support awareness of human activities in software development: a survey and a framework In: Proceedings of the 2005 ACM Symposium on Software Visualization, 193–202. ACM.
134. Hannay JE, Sjoberg DI, Dyba T (2007) A systematic review of theory use in software engineering experiments. IEEE Trans Softw Eng 33(2): 87–107.
135. Sjøberg DI, Dybå T, Anda BC, Hannay JE (2008) Building theories in software engineering In: Guide to advanced empirical software engineering, 312–336. Springer, NYC.
136. Johnson P, Ekstedt M, Jacobson I (2012) Where’s the theory for software engineering?IEEE Softw 29(5): 96.
137. Stol KJ, Fitzgerald B (2015) Theory-oriented software engineering. Sci Comput Program 101: 79–98. http://www.sciencedirect.com/science/article/pii/S0167642314005425
138. Eisenhardt KM (1989) Building theories from case study research. Acad Manag Rev 14(4): 532–550.
139. Mockus A, Fielding RT, Herbsleb J (2000) A case study of open source software development: the apache server In: Proceedings of the 22nd international conference on software engineering, 263–272. ACM.
140. Madey G, Freeh V, Tynan R (2002) The open source development phenomenon: An analysis based on social network theory In: Americas Conference on Information Systems (AMCIS2002), 1806–1813, Dallas, Texas, USA. http://www.nd.edu/~oss/Papers/amcis_oss.pdf
141. López L, González-Barahona JM, Robles G (2004) Applying social network analysis to the information in CVS repositories In: Proceedings of the international workshop on mining software repositories, 101–105, Edinburg, UK.
142. Kagdi H, Collard ML, Maletic JI (2007) A survey and taxonomy of approaches for mining software repositories in the context of software evolution. J Softw Maint Evol Res Pract 19(2): 77–131.
143. Robles G, Gonzalez-Barahona JM, Michlmayr M, Amor JJ2006. Mining large software compilations over time: another perspective of software evolution. ACM. ISBN = 1595933972.
144. Hahn J, Moon JY, Zhang C (2008) Emergence of new project teams from open source software developer Emergence of new project teams from open source software developer. Inform Syst Res 19(3): 369–391.
145. Howison J, Wiggins A, Crowston K (2012) Validity issues in the use of social network analysis with digital trace data. J Assoc Inf Syst 44(2): 767–797.
146. Lundvall BA (1922) User-producer relationships, national systems of innovation and internationalisation. National systems of innovation: Towards a theory of innovation and interactive learning: 45–67.
147. Cambrosio A, Keating P, Mogoutov A (2004) Mapping collaborative work and innovation in biomedicine: A computer-assisted analysis of antibody reagent workshops. Social Studies of Science: 325–364.
148. Glänzel W, Schubert A (2005) Analysing scientific networks through co-authorship In: Handbook of quantitative science and technology research, 257–276. Springer, NYC.
149. Zachary W (1977) An Information Flow Model for Conflict and Fission in Small Groups. J Anthropological Res 33(4): 452–473.
150. Kleinberg J (2002) An impossibility theorem for clustering. vol 15: 463–470. NIPS.
151. Newman MEJ, Girvan M (2004) Finding and evaluating community structure in networks. Phys Rev E 69(2): 026113.
152. Adamcsek B, Palla G, Farkas IJ, Derényi I, Vicsek T (2006) CFinder: locating cliques and overlapping modules in biological networks. Bioinformatics 22(8): 1021–1023.
153. Brohee S, van Helden J (2006) Evaluation of clustering algorithms for protein-protein interaction networks. BMC bioinformatics 7(1): 488.
154. Fortunato S (2010) Community detection in graphs. Phys Rep 486(3): 75–174.
155. Nick B, Lee C, Cunningham P, Brandes U (2013) Simmelian backbones: amplifying hidden homophily in facebook networks In: Advances in Social Networks Analysis and Mining (ASONAM), 2013 IEEE/ACM International Conference On, 525–532. IEEE.