J. Aaker, Dimensions of Brand Personality, Journal of Marketing Research, vol.34, issue.3, pp.347-356, 1997.
DOI : 10.2307/3151897

R. P. Bagozzi and Y. Yi, On the evaluation of Structural Equatation Models, Journal of the Academy of Marketing Sciences, vol.161, pp.74-94, 1988.

R. Bogazzi and Y. Yi, Assessing Construct Validity in Organizational Research, Administrative Science Quarterly, vol.36, issue.3, pp.421-458, 1991.
DOI : 10.2307/2393203

M. W. Browne and R. Cudeck, Alternative Ways of Assessing Model Fit, Sociological Methods & Research, vol.50, issue.2, 1993.
DOI : 10.1007/BF02294104

H. Chesbrough, The era of open innovation, Sloan Management Review, vol.44, pp.35-41, 2003.

E. E. Cureton, D. Agostino, and R. B. , Factor Analysis: An Applied Approach, 1983.

E. L. Deci and R. M. Ryan, Intrinsic Motivation and Self-Determination in Human Behavio, 1985.

C. Fornell and D. F. Larcker, Evaluating Structural Equation Models with Unobservable Variables and Measurement Error, Journal of Marketing Research, vol.18, issue.1, pp.39-50, 1981.
DOI : 10.2307/3151312

J. Füller and G. Jawecki, Innovation creation by online basketball communities, Journal of Business Research, vol.60, issue.1, pp.60-71, 2007.
DOI : 10.1016/j.jbusres.2006.09.019

R. A. Ghosh and R. Glott, The Free/Libre and Open Source Software Developers Survey and Study ? FLOSS, 2002.

J. F. Hair and R. E. Anderson, Multivariate Data Analysis, 1998.

A. Hars and S. Ou, Working for free? Motivations of participating in open source projects, Proceedings of the 34th Annual Hawaii International Conference on System Sciences, pp.25-39, 2002.
DOI : 10.1109/HICSS.2001.927045

J. Heckhausen and H. Heckhausen, Motivation und Handeln, 2006.
DOI : 10.1007/978-3-662-08870-8

G. Hertel and S. Niedner, Motivation of software developers in Open Source projects: an Internet-based survey of contributors to the Linux kernel, Research Policy, vol.32, issue.7, pp.1159-1177, 2003.
DOI : 10.1016/S0048-7333(03)00047-7

C. Homburg and A. Giering, Konzeptionalisierung und Operationalisierung komplexer Konstrukte: Ein Leitfaden für die Marketingforschung, Marketing Zeitschrift für Forschung und Praxis, vol.181, pp.5-24, 1996.

C. Kelly and S. Breinlinger, Identity and injustice: Exploring women's participation in collective action, Journal of Community & Applied Social Psychology, vol.58, issue.1, pp.41-57, 1995.
DOI : 10.1111/j.2044-8309.1984.tb00645.x

K. R. Lakhani and B. Wolf, Why Hackers Do What They Do: Understanding Motivation and Effort in Free/Open Source Software Projects, Perspectives on Free and Open Source Software, 2005.
DOI : 10.2139/ssrn.443040

J. M. Leimeister and M. Huber, Leveraging Crowdsourcing: Activation-Supporting Components for IT-Based Ideas Competition, Journal of Management Information Systems, vol.26, issue.1, pp.197-224, 2009.
DOI : 10.2753/MIS0742-1222260108

J. C. Nunnally, Psychometric Theory, 1978.

M. Osterloh and S. Rota, Open Source Software Production: Climbing on the Shoulders of Giants, 2002.

F. T. Piller and D. Walcher, Toolkits for idea competitions: a novel method to integrate users in new product development, R and D Management, vol.24, issue.4, pp.307-318, 2006.
DOI : 10.1287/mnsc.48.7.821.2817

E. S. Raymond, The New Hacker's Dictionary, 1996.

S. K. Shah, Motivation, Governance & the Viability of Hybrid Forms in Open Source Software Development, 2005.

B. Shneiderman, Creating creativity: user interfaces for supporting innovation, ACM Transactions on Computer-Human Interaction, vol.7, issue.1, pp.114-138, 2000.
DOI : 10.1145/344949.345077

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.296.6497

B. Simon and M. Loewy, Collective identification and social movement participation., Journal of Personality and Social Psychology, vol.74, issue.3, pp.646-658, 1998.
DOI : 10.1037/0022-3514.74.3.646

E. Von-hippel, Lead Users: A Source of Novel Product Concepts, Management Science, vol.32, issue.7, pp.791-805, 1986.
DOI : 10.1287/mnsc.32.7.791

E. Von-hippel, ???Sticky Information??? and the Locus of Problem Solving: Implications for Innovation, Management Science, vol.40, issue.4, pp.429-439, 1994.
DOI : 10.1287/mnsc.40.4.429

L. Von-rosenstiel, Grundlagen der Organisationspsychologie, 2003.