@booklet {1781,
	title = {Lessons Learned from Applying Social Network Analysis on an Industrial Free/Libre/Open Source Software Ecosystem},
	year = {2015},
	abstract = {Many software projects are no longer done in-house by a single organization. Instead, we are in a new age where software is developed by a networked community of individuals and organizations, which base their relations to each other on mutual interest. Paradoxically, recent research suggests that software development can actually be jointly-developed by rival firms. For instance, it is known that the mobile-device makers Apple and Samsung kept collaborating in open source projects while running expensive patent wars in the court. Taking a case study approach, we explore how rival firms collaborate in the open source arena by employing a multi-method approach that combines qualitative analysis of archival data (QA) with mining software repositories (MSR) and Social Network Analysis (SNA). While exploring collaborative processes within the OpenStack ecosystem, our research contributes to Software Engineering research by exploring the role of groups, sub-communities and business models within a high-networked open source ecosystem. Surprising results point out that competition for the same revenue model (i.e., operating conflicting business models) does not necessary affect collaboration within the ecosystem. Moreover, while detecting the different sub-communities of the OpenStack community, we found out that the expected social tendency of developers to work with developers from same firm (i.e., homophony) did not hold within the OpenStack ecosystem. Furthermore, while addressing a novel, complex and unexplored open source case, this research also contributes to the management literature in coopetition strategy and high-tech entrepreneurship with a rich description on how heterogeneous actors within a high-networked ecosystem (involving individuals, startups, established firms and public organizations) joint-develop a complex infrastructure for big-data in the open source arena.},
	keywords = {business models, cloud computing, homophily, open source, Open-Coopetition, openstack, social network analysis, Software ecosystems},
	url = {http://arxiv.org/abs/1507.04587},
	author = {Teixeira, Jose and Gregorio Robles and Jesus M. Gonzalez-Barahona}
}
@conference {Tymchuk:2014:COP:2597073.2597093,
	title = {Collaboration in Open-source Projects: Myth or Reality?},
	booktitle = {Proceedings of the 11th Working Conference on Mining Software Repositories},
	series = {MSR 2014},
	year = {2014},
	pages = {304{\textendash}307},
	publisher = {ACM},
	organization = {ACM},
	address = {New York, NY, USA},
	abstract = {One of the fundamental principles of open-source projects is that they foster collaboration among developers, disregarding their geographical location or personal background. When it comes to software repositories collaboration is a rather ephemeral phenomenon which lacks a clear definition, and it must therefore be mined and modeled. This throws up the question whether what is mined actually maps to reality.

In this paper we investigate collaboration by modeling it using a number of diverse approaches that we then compare to a ground truth obtained by surveying a substantial set of developers of the Pharo open-source community. Our findings indicate that the notion of collaboration must be revisited, as it is undermined by a number of factors that are often tackled in imprecise ways or not taken into account at all.},
	keywords = {COLLABORATION, Software ecosystems},
	isbn = {978-1-4503-2863-0},
	doi = {10.1145/2597073.2597093},
	url = {http://doi.acm.org/10.1145/2597073.2597093},
	author = {Tymchuk, Yuriy and Mocci, Andrea and Lanza, Michele}
}
@conference {Eckhardt:2014:MMO:2642803.2642810,
	title = {The Merits of a Meritocracy in Open Source Software Ecosystems},
	booktitle = {Proceedings of the 2014 European Conference on Software Architecture Workshops},
	series = {ECSAW {\textquoteright}14},
	year = {2014},
	pages = {7:1{\textendash}7:6},
	publisher = {ACM},
	organization = {ACM},
	address = {New York, NY, USA},
	abstract = {The Eclipse open source ecosystem has grown from a small internal IBM project to one of the biggest Integrated Development Environments in the market. Open source communities and ecosystems do not follow the standard governance strategies typically used in large organizations. A meritocracy is a frequently occurring form of governance on different levels in open ecosystems. In this paper we investigate how this form of governance influences the health of projects within the Eclipse ecosystem in terms of the amount of commits within each month. We analyzed the hierarchy of Eclipse, how merits are conceptualized within the ecosystem and the effect of the appointments of mentors and project leads on the amount of commits. From our research, we can conclude that this system is not always as fair as it seems; merits are only a benefit in some cases.},
	keywords = {Ecosystem Health, Meritocracy, open source, Software ecosystems},
	isbn = {978-1-4503-2778-7},
	doi = {10.1145/2642803.2642810},
	url = {http://doi.acm.org/10.1145/2642803.2642810},
	author = {Eckhardt, Evert and Kaats, Erwin and Slinger Jansen and Alves, Carina}
}
