P. Aghion and P. Howitt, Endogenous Growth Theory, 1998.

G. Ahuja, Collaboration Networks, Structural Holes, and Innovation: A Longitudinal Study, Administrative Science Quarterly, vol.45, issue.3, pp.425-455, 2000.
DOI : 10.2307/2667105

M. Aouchiche, F. Bell, D. Cvetkovi´ccvetkovi´c, P. Hansen, P. Rowlinson et al., Variable neighborhood search for extremal graphs. 16. Some conjectures related to the largest eigenvalue of a graph, European Journal of Operational Research, vol.191, issue.3, pp.661-676, 2008.
DOI : 10.1016/j.ejor.2006.12.059

V. Bala and S. Goyal, A Noncooperative Model of Network Formation, Econometrica, vol.68, issue.5, pp.1181-1230, 2000.
DOI : 10.1111/1468-0262.00155

C. Ballester, A. Calvó-armengol, and Y. Zenou, Who's Who in Networks. Wanted: The Key Player, Econometrica, vol.74, issue.5, pp.1403-1417, 2006.
DOI : 10.1111/j.1468-0262.2006.00709.x

F. Bell, On the maximal index of connected graphs, Linear Algebra and its Applications, vol.144, pp.135-151, 1991.
DOI : 10.1016/0024-3795(91)90067-7

B. Bollobas, Modern Graph Theory. Graduate Texts in Mathematics, 1998.

R. A. Brualdi, E. Solheid, and S. , On the spectral radius of connected graphs, pp.45-54, 1986.

R. Burt, Structural Holes: The Social Structure of Competition, 1992.

N. Carayol, P. Roux, ?. Y?ld?zo, and M. Glu, Inefficiencies in a model of spatial networks formation with positive externalities, Journal of Economic Behavior & Organization, vol.67, issue.2, pp.495-511, 2008.
DOI : 10.1016/j.jebo.2007.04.004

URL : https://hal.archives-ouvertes.fr/hal-00601886

J. S. Coleman, Social Capital in the Creation of Human Capital, American Journal of Sociology, vol.94, pp.95-120, 1988.
DOI : 10.1086/228943

J. Corbo, A. Calvó-armengol, and D. Parkes, A study of Nash equilibrium in contribution games for peer-to-peer networks, ACM SIGOPS Operating Systems Review, vol.40, issue.3, pp.61-66, 2006.
DOI : 10.1145/1151374.1151388

R. Cowan and N. Jonard, Network structure and the diffusion of knowledge, Journal of Economic Dynamics and Control, vol.28, issue.8, pp.1557-1575, 2004.
DOI : 10.1016/j.jedc.2003.04.002

URL : https://hal.archives-ouvertes.fr/hal-00279020

R. Cowan and N. Jonard, Structural holes, innovation and the distribution of ideas, Journal of Economic Interaction and Coordination, vol.393, issue.2, pp.93-110, 2007.
DOI : 10.1007/s11403-007-0024-0

URL : https://hal.archives-ouvertes.fr/hal-00278977

R. Cowan, N. Jonard, and J. Zimmermann, Evolving networks of inventors, Journal of Evolutionary Economics, vol.113, issue.1-2, pp.155-174, 2006.
DOI : 10.1007/s00191-005-0013-1

URL : https://hal.archives-ouvertes.fr/hal-00279215

D. Cvetkovic, M. Doob, and H. Sachs, Spectra of Graphs: Theory and Applications, 1995.

D. Cvetkovic and P. Rowlinson, The largest eigenvalue of a graph: A survey, Linear and Multilinear Algebra, vol.24, issue.1-2, pp.3-33, 1990.
DOI : 10.1016/0024-3795(88)90183-8

D. Cvetkovic, P. Rowlinson, and S. K. Simic, Eigenvalue bound for the signless laplacian . Publications de l'institute mathematique, nouvelle serie, pp.81-92, 2007.

G. Dosi, Sources, procedures and microeconomic effects of innovation, Journal of Economic Literature, vol.26, issue.3, pp.1120-1171, 1988.

L. Fleming, C. King, . Juda, and I. Adam, Small Worlds and Regional Innovation, Organization Science, vol.18, issue.6, pp.938-954, 2007.
DOI : 10.1287/orsc.1070.0289

T. Fruchterman and E. Reingold, Graph drawing by force-directed placement. Software-Practice and Experience, pp.1129-1164, 1991.

M. Gargiulo and M. Benassi, Trapped in Your Own Net? Network Cohesion, Structural Holes, and the Adaptation of Social Capital, Organization Science, vol.11, issue.2, pp.183-196, 2000.
DOI : 10.1287/orsc.11.2.183.12514

S. Goyal and S. Joshi, Networks of collaboration in oligopoly, Games and Economic Behavior, vol.43, issue.1, pp.57-85, 2003.
DOI : 10.1016/S0899-8256(02)00562-6

S. Goyal and J. L. Moraga-gonzalez, R&D Networks, The RAND Journal of Economics, vol.32, issue.4, pp.686-707, 2001.
DOI : 10.2307/2696388

I. Gutman and P. Paule, The variance of the vertex degrees of randomly generated graphs, Publikacije Elektrotehni?kog fakulteta - serija: matematika, vol.13, issue.13, pp.30-35, 2002.
DOI : 10.2298/PETF0213030G

W. Haemers, Handbook of Linear Algebra, Ch. Matrices and Graphs, 2006.

J. Hagedoorn, Inter-firm R&D partnerships: an overview of major trends and patterns since 1960, Research Policy, vol.31, issue.4, pp.477-492, 2002.
DOI : 10.1016/S0048-7333(01)00120-2

H. Haller, J. Kamphorst, and S. Sarangi, (Non-)existence and Scope of Nash Networks, Economic Theory, vol.71, issue.3, pp.597-604, 2007.
DOI : 10.1007/s00199-006-0105-7

H. Haller and S. Sarangi, Nash networks with heterogeneous links, Mathematical Social Sciences, vol.50, issue.2, pp.181-201, 2005.
DOI : 10.1016/j.mathsocsci.2005.02.003

N. Hanaki, R. Nakajima, and Y. Ogura, The Dynamics of R&D Collaboration in the IT Industry, SSRN Electronic Journal, 2007.
DOI : 10.2139/ssrn.1000103

Y. Hong, Bounds of eigenvalues of graphs. Discrete Math, pp.65-74, 1993.

R. A. Horn and C. R. Johnson, Matrix Analysis, 1990.

M. O. Jackson and B. Golub, Naive learning in social networks: Convergence, influence and wisdom of crowds. Working Papers, 2007.

M. O. Jackson and A. Watts, The Evolution of Social and Economic Networks, Journal of Economic Theory, vol.106, issue.2, pp.265-295, 2002.
DOI : 10.1006/jeth.2001.2903

M. O. Jackson and A. Wolinsky, A Strategic Model of Social and Economic Networks, Journal of Economic Theory, vol.71, issue.1, pp.44-74, 1996.
DOI : 10.1006/jeth.1996.0108

B. Kogut and U. Zander, Knowledge of the Firm, Combinative Capabilities, and the Replication of Technology, Organization Science, vol.3, issue.3, pp.383-397, 1992.
DOI : 10.1287/orsc.3.3.383

M. D. König, S. Battiston, M. Napoletano, and F. Schweitzer, On algebraic graph theory and the dynamics of innovation networks, Networks and Heterogeneous Media, vol.3, issue.2, pp.201-219, 2008.

W. Letterie, J. Hagedoorn, H. Van-kranenburg, and F. Palm, Information gathering through alliances, Journal of Economic Behavior & Organization, vol.66, issue.2, pp.176-194, 2008.
DOI : 10.1016/j.jebo.2006.05.003

C. Maas, Perturbation results for the adjacency spectrum of a graph, ZAMM, vol.67, issue.5, pp.428-430, 1987.

F. Pammolli and M. Riccaboni, Technological regimes and the growth of networks: An empirical analysis, Small Business Economics, vol.19, issue.3, pp.205-220, 2002.
DOI : 10.1023/A:1019682612073

W. W. Powell, K. W. 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.116-145, 1996.
DOI : 10.2307/2393988

W. W. Powell, D. R. White, K. W. Koput, and J. Owen-smith, Network Dynamics and Field Evolution: The Growth of Interorganizational Collaboration in the Life Sciences, American Journal of Sociology, vol.110, issue.4, pp.1132-1205, 2005.
DOI : 10.1086/421508

J. F. Reinganum, Uncertain innovation and the persistence of monopoly, The American Economic Review, vol.73, issue.4, pp.741-748, 1983.

J. F. Reinganum, Innovation and Industry Evolution, The Quarterly Journal of Economics, vol.100, issue.1, pp.81-99, 1985.
DOI : 10.2307/1885736

N. Roijakkers and J. Hagedoorn, Inter-firm R&D partnering in pharmaceutical biotechnology since 1975: Trends, patterns, and networks, Research Policy, vol.35, issue.3, pp.431-446, 2006.
DOI : 10.1016/j.respol.2006.01.006

T. Rowley, D. Behrens, and D. Krachhardt, Redundant governance structures: an analysis of structural and relational embeddedness in the steel and semiconductor industries, Strategic Management Journal, vol.8, issue.3, pp.369-386, 2000.
DOI : 10.1002/(SICI)1097-0266(200003)21:3<369::AID-SMJ93>3.0.CO;2-M

E. Seneta, Non-negative Matrices And Markov Chains, 2006.
DOI : 10.1007/0-387-32792-4

R. P. Stanley, A bound on the spectral radius of graphs with e edges, Linear Algebra and its Applications, vol.87, pp.267-269, 1987.
DOI : 10.1016/0024-3795(87)90172-8

K. Stephenson and M. Zelen, Rethinking centrality: Methods and examples, Social Networks, vol.11, issue.1, pp.1-37, 1989.
DOI : 10.1016/0378-8733(89)90016-6

F. Vega-redondo and S. Goyal, Structural holes in social networks, Journal of Economic Theory, vol.137, issue.1, pp.460-492, 2007.

G. Walker, B. Kogut, and W. Shan, Social Capital, Structural Holes and the Formation of an Industry Network, Organization Science, vol.8, issue.2, pp.109-125, 1997.
DOI : 10.1287/orsc.8.2.109

S. Wasserman and K. Faust, Social Network Analysis: Methods and Applications, 1994.
DOI : 10.1017/CBO9780511815478

M. L. Weitzman, Recombinant Growth, The Quarterly Journal of Economics, vol.113, issue.2, pp.331-360, 1998.
DOI : 10.1162/003355398555595

D. West and B. , Introduction to Graph Theory, 2001.

S. G. Winter, Schumpeterian competition in alternative technological regimes, Journal of Economic Behavior & Organization, vol.5, issue.3-4, pp.287-320, 1984.
DOI : 10.1016/0167-2681(84)90004-0

D. Zwillinger, Handbook of Differential Equations, 1998.