L. Argote, A. Kane, and J. Levine, Knowledge transfer between groups via personnel rotation: Effects of social identity and knowledge quality, Organizational Behavior and Human Decisions Processes, pp.56-71, 2005.

C. Argyris and D. Schön, Organizational learning: Theory, Method, and Practice, 1978.

B. Aharonson, J. Baum, and A. Plunket, Inventive and uninventive clusters: The case of Canadian biotechnology, Research Policy, vol.37, issue.6-7, pp.1108-1131, 2008.
DOI : 10.1016/j.respol.2008.04.008

A. Arora and A. Gambardella, Complementarity and external linkages: the strategies of the large firms in biotechnology', The journal of industrial economics, pp.361-379, 1990.

D. Audretsch and P. Stephan, Company-Scientist Locational Links: The Case of Biotechnology', The American Economic Review, pp.641-652, 1996.
DOI : 10.4337/9781786432797.00019

C. Autant-bernard, V. Mangematin, and N. Massard, Creation of Biotech SMEs in France, Small Business Economics, vol.26, issue.1/2, pp.173-87, 2006.
DOI : 10.1007/978-94-017-3333-5
URL : https://hal.archives-ouvertes.fr/hal-00424337

S. R. Barley, The Alignment of Technology and Structure through Roles and Networks, Administrative Science Quarterly, vol.35, issue.1, pp.61-103, 1990.
DOI : 10.2307/2393551
URL : http://doi.org/10.2307/2393551

J. Baum, T. Calabrese, and B. Silverman, Don't go it alone: alliance network composition and startups' performance in Canadian biotechnology, Strategic Management Journal, vol.36, issue.3, pp.267-94, 2000.
DOI : 10.2307/2393356

P. M. Blau, The dynamics of bureaucracy, 1955.

P. M. Blau, Exchange and power in social life, 1964.

N. Boufaden and A. Plunket, Investigating technological and geographic proximity on forms' innovation in an immature cluster: the Paris area biotech cluster, DRUID Conference, 2005.

S. P. Borgatti and R. Cross, A Relational View of Information Seeking and Learning in Social Networks, Management Science, vol.49, issue.4, pp.432-445, 2003.
DOI : 10.1287/mnsc.49.4.432.14428
URL : http://www.andrew.cmu.edu/user/mkevin/relational.pdf

S. Casper, How do technology clusters emerge and become sustainable?, Research Policy, vol.36, issue.4, pp.438-455, 2007.
DOI : 10.1016/j.respol.2007.02.018

R. Cross, . Borgatti, P. Stephen, and A. Parker, Beyond answers: dimensions of the advice network, Social Networks, vol.23, issue.3, pp.215-235, 2001.
DOI : 10.1016/S0378-8733(01)00041-7
URL : http://www.steveborgatti.com/papers/borgatti - beyond answers, dimensions of the advice network.pdf

M. S. Gertler and Y. M. Levitte, Local Nodes in Global Networks: The Geography of Knowledge Flows in Biotechnology Innovation, Industry & Innovation, vol.88, issue.4, pp.487-507, 2005.
DOI : 10.1111/j.1465-7295.1998.tb01696.x

D. Gibbons, Friendship and Advice Networks in the Context of Changing Professional Values, Administrative Science Quarterly, vol.49, pp.238-262, 2004.

M. Gilding, ???The tyranny of distance???: Biotechnology networks and clusters in the antipodes, Research Policy, vol.37, issue.6-7, pp.1132-1144, 2008.
DOI : 10.1016/j.respol.2008.04.004

M. T. Hansen, Knowledge networks : explaining effective knowledge sharing in multi-unit companies », Organisation Science, pp.232-248, 2002.
DOI : 10.1287/orsc.13.3.232.2771

H. Ibarra and S. B. Andrews, Power, Social Influence, and Sense Making: Effects of Network Centrality and Proximity on Employee Perceptions, Administrative Science Quarterly, vol.38, issue.2, pp.277-303, 1993.
DOI : 10.2307/2393414

M. Kilduff and W. Tsai, Social networks and organizations. Thousand OaksThe Network as Knowledge: Generative Rules and the Emergence of Structure, Sage Kogut, B. Strategic Management Journal, vol.21, pp.405-425, 2000.

B. Kogut and U. Zander, What Firms Do? Coordination, Identity, and Learning, Organization Science, vol.7, issue.5, pp.502-518, 1996.
DOI : 10.1287/orsc.7.5.502

D. Krackhardt, Cognitive social structures, Social Networks, vol.9, issue.2, pp.109-134, 1987.
DOI : 10.1016/0378-8733(87)90009-8

D. Krackhardt, Assessing the Political Landscape: Structure, Cognition, and Power in Organizations, Administrative Science Quarterly, vol.35, issue.2, pp.342-369, 1990.
DOI : 10.2307/2393394
URL : http://doi.org/10.2307/2393394

E. Lazega, Micropolitics ok Knowledge: Communication and indirect control in workgroups, Aldine-de-Gruyter, 1992.

E. Lazega, The Collegial Phenomenon : The Social mechanisms of cooperation among peers in a corporate law partnership, 2001.
DOI : 10.1093/acprof:oso/9780199242726.001.0001

E. Lazega and M. Van-duijn, Position in formal structure, personal characteristics and choices of advisors in a law firm: A logistic regression model for dyadic network data, Social Networks, vol.19, issue.4, pp.375-397, 1997.
DOI : 10.1016/S0378-8733(97)00006-3
URL : https://hal.archives-ouvertes.fr/hal-01800254

S. Lemarié, V. Mangematin, and A. Torre, Is the creation and development of biotech localized? Conclusion drawn from the French case, Small Business Economics, vol.17, issue.1/2, pp.61-76, 2001.
DOI : 10.1023/A:1011197616151

B. Levitt and J. G. March, Organizational Learning, Annual Review of Sociology, vol.14, issue.1, pp.319-340, 1988.
DOI : 10.1146/annurev.so.14.080188.001535

V. Mangematin, S. Lemarie, J. P. Boissin, D. Catherine, F. Corolleur et al., Development of SMEs and heterogeneity of trajectories: the case of biotechnology in France, Research Policy, vol.32, issue.4, pp.621-638, 2003.
DOI : 10.1016/S0048-7333(02)00045-8
URL : https://hal.archives-ouvertes.fr/hal-00422563

M. Mcdonald and J. Westphal, Getting by with the Advice of Their Friends: CEOs, 2003.

M. S. Mizruchi and L. B. Stearns, Getting Deals Done: The Use of Social Networks in Bank Decision-Making, American Sociological Review, vol.66, issue.5, pp.647-741, 2001.
DOI : 10.2307/3088952

J. Niosi, Alliances are not enough explaining rapid growth in biotechnology firms, Research Policy, vol.32, issue.5, pp.737-750, 2003.
DOI : 10.1016/S0048-7333(02)00083-5
URL : https://chairetechno.esg.uqam.ca/upload/files/realisations/articles/alliances_are_not_enough.pdf

A. Pina-stranger, forthcoming, 2009) « Transfert technologique et processus collectif d'apprentissage dans l'industrie des biotechnologies en France

G. Pisano, The governance of innovation: Vertical integration and collaborative arrangements in the biotechnology industry, Research Policy, vol.20, issue.3, pp.237-249, 1991.
DOI : 10.1016/0048-7333(91)90054-T

W. W. Powell, K. Koput, and L. Smith-doerr, Interorganizational Collaboration and the Locus of Innovation: Networks of Learning in Biotechnology, Administrative Science Quarterly, vol.41, issue.1, pp.116-161, 1996.
DOI : 10.2307/2393988

W. W. Powell, K. Koput, L. Smith-doerr, and J. Owen-smith, Network position and firm performance: Organizational returns to collaboration in the biotechnology industry, Research in the Sociology of Organizations, pp.129-159, 1999.

W. W. Powell, K. Koput, J. Bowie, and L. Smith-doerr, The Spatial Clustering of Science and Capital: Accounting for Biotech Firm-Venture Capital Relationships, Regional Studies, vol.88, issue.3, pp.291-305, 2002.
DOI : 10.1111/1468-5957.00201
URL : http://www.stanford.edu/~woodyp/papers/The-Spatial-Clustering-of-Science-and-Capital.pdf

G. Robins, T. Snijders, P. Wang, M. Handcock, and P. Pattison, Recent developments in exponential random graph (p*) models for social networks, Social Networks, vol.29, issue.2, pp.192-215, 2007.
DOI : 10.1016/j.socnet.2006.08.003
URL : https://pure.rug.nl/ws/files/10249122/RobinsGL-Recent-2007.pdf

G. Robins and P. Pattison, Interdependencies and Social Processes: Generalized Dependence Structures.' in Models and Methods in Social Network Analysis, pp.192-214, 2005.
DOI : 10.1017/cbo9780511811395.010

D. L. Rulke and J. Galaskiewicz, Distribution of Knowledge, Group Network Structure, and Group Performance, Management Science, vol.46, issue.5, pp.612-625, 2000.
DOI : 10.1287/mnsc.46.5.612.12052

N. Salman and A. Saives, Indirect networks: an intangible resource for biotechnology innovation', R&D Management, pp.203-215, 2005.
DOI : 10.1111/j.1467-9310.2005.00383.x

J. Senker and M. Sharp, Organizational Learning in Cooperative Alliances: Some Case Studies in Biotechnology, Technology Analysis & Strategic Management, vol.12, issue.1, pp.35-51, 1997.
DOI : 10.1016/0048-7333(86)90027-2

M. ?kerlavaj, . Dimovski, and . Vlado, Social Network Approach To Organizational Learning, Journal of Applied Business Research (JABR), vol.22, issue.2, pp.89-97, 2006.
DOI : 10.19030/jabr.v22i2.1440

T. Snijders, P. Pattison, G. L. Robins, and M. Handcock, New Specifications for Exponential Random Graph Models, Sociological Methodology, vol.22, issue.1, pp.99-153, 2006.
DOI : 10.1086/210318
URL : http://www.stat.cmu.edu/~fienberg/Stat36-835/Snijders_New%20Specs%20for%20ERGM.pdf

T. Snijders, C. Steglich, M. Schweinberger, and M. Huisman, Manual for Siena version 3, 2007.

R. Sparrowe, R. Liden, S. Wayne, and M. Kraimer, Social networks and the performance of individuals and groups, Academy of Management Journal, vol.44, issue.2, pp.316-325, 2001.
DOI : 10.5465/3069458

T. Stuart and O. Sorenson, The geography of opportunity: spatial heterogeneity in founding rates and the performance of biotechnology firms, Research Policy, vol.32, issue.2, pp.229-253, 2003.
DOI : 10.1016/S0048-7333(02)00098-7

T. Stuart, S. Ozdemir, and W. Ding, Vertical alliance networks: The case of university???biotechnology???pharmaceutical alliance chains, Research Policy, vol.36, issue.4, pp.477-498, 2007.
DOI : 10.1016/j.respol.2007.02.016
URL : http://haas.berkeley.edu/faculty/papers/ding8_vertical alliance.pdf

W. Tsaï, Social Structure of ???Coopetition??? Within a Multiunit Organization: Coordination, Competition, and Intraorganizational Knowledge Sharing, Organization Science, vol.13, issue.2, pp.179-190, 2002.
DOI : 10.1287/orsc.13.2.179.536

M. Van-duijn, T. Snijders, and B. Zijlstra, p2: a random effects model with covariates for directed graphs, Statistica Neerlandica, vol.86, issue.2, pp.234-254, 2004.
DOI : 10.1080/01621459.1991.10475006

M. Waters, Collegiality, Bureaucratization, and Professionalization: A Weberian Analysis, American Journal of Sociology, vol.94, issue.5, p.945, 1989.
DOI : 10.1086/229109

K. Weick, Cognitive processes in organizations, Research in Organizational Behavior, vol.1, pp.41-74, 1979.

B. Zijlstra and M. Van-duijn, Manual p2, version 4.0.0, 2008.