D. Abreu, Extremal equilibria of oligopolistic supergames, Journal of Economic Theory, vol.39, issue.1, pp.191-225, 1986.
DOI : 10.1016/0022-0531(86)90025-6

D. Abreu, On the Theory of Infinitely Repeated Games with Discounting, Econometrica, vol.56, issue.2, pp.383-396, 1988.
DOI : 10.2307/1911077

S. Athey and K. Bagwell, Optimal Collusion with Private Information, The RAND Journal of Economics, vol.32, issue.3, pp.428-465, 2001.
DOI : 10.2307/2696363
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.120.193

S. Athey, K. Bagwell, and C. Sanchirico, Collusion and Price Rigidity, Review of Economic Studies, vol.71, issue.2, pp.317-349, 2004.
DOI : 10.1111/0034-6527.00286
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.184.286

S. Athey and K. Bagwell, Collusion With Persistent Cost Shocks, Econometrica, vol.76, issue.3, pp.76-493, 2008.
DOI : 10.1111/j.1468-0262.2008.00845.x

K. Bagwell and R. W. Staiger, Collusion over the Business Cycle, The RAND Journal of Economics, vol.28, issue.1, pp.82-106, 1997.
DOI : 10.2307/2555941

M. Baker, J. C. Stein, and J. Wurgler, When Does the Market Matter? Stock Prices and the Investment of Equity-Dependent Firms, The Quarterly Journal of Economics, vol.118, issue.3, pp.969-1005, 2003.
DOI : 10.1162/00335530360698478

D. Bernheim and M. D. Whinston, Multimarket Contact and Collusive Behavior, The RAND Journal of Economics, vol.21, issue.1, pp.1-26, 1990.
DOI : 10.2307/2555490

M. Chang, The effects of product differentiation on collusive pricing, International Journal of Industrial Organization, vol.9, issue.3, pp.453-469, 1991.
DOI : 10.1016/0167-7187(91)90023-E

O. Compte, J. , F. Rey, and P. , Capacity constraints, mergers and collusion, European Economic Review, vol.46, issue.1, pp.1-29, 2002.
DOI : 10.1016/S0014-2921(01)00099-X
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.419.5130

R. Deneckere, Duopoly supergames with product differentiation, Economics Letters, vol.11, issue.1-2, pp.37-42, 1983.
DOI : 10.1016/0165-1765(83)90159-3

R. Deneckere, Corrigenda, Economics Letters, vol.15, pp.385-87, 1984.

J. W. Friedman, A Non-cooperative Equilibrium for Supergames, The Review of Economic Studies, vol.38, issue.1, pp.1-12, 1971.
DOI : 10.2307/2296617

D. Fudenberg and J. Tirole, Game Theory, 1991.

R. Gagné, S. Van-norden, and B. Versaevel, Testing Optimal Punishment Mechanisms Under Price Regulation: The Case of the Retail Market for Gasoline, SSRN Electronic Journal, vol.28, pp.6-11, 2006.
DOI : 10.2139/ssrn.988655

E. J. Green and R. H. Porter, Noncooperative Collusion under Imperfect Price Information, Econometrica, vol.52, issue.1, pp.87-100, 1984.
DOI : 10.2307/1911462
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.295.3221

J. Häckner, Collusive pricing in markets for vertically differentiated products, International Journal of Industrial Organization, vol.12, issue.2, pp.155-177, 1994.
DOI : 10.1016/0167-7187(94)90011-6

J. Häckner, Optimal symmetric punishments in a Bertrand differentiated products duopoly, International Journal of Industrial Organization, vol.14, issue.5, pp.611-630, 1996.
DOI : 10.1016/0167-7187(95)00509-9

J. Häckner, A note on price and quantity competition in differentiated oligopolies, Journal of Economic Theory, vol.77, issue.1, pp.181-191, 2000.

J. Haltiwanger and J. E. Harrington, The Impact of Cyclical Demand Movements on Collusive Behavior, The RAND Journal of Economics, vol.22, issue.1, pp.89-106, 1991.
DOI : 10.2307/2601009

J. Houde, Entry and exit in a price regulated industry: gasoline retailing in Quebec, 2008.

L. Lambertini and D. Sasaki, Marginal costs and collusive sustainability, Economics Letters, vol.72, issue.1, pp.117-120, 2001.
DOI : 10.1016/S0165-1765(01)00409-8

L. Lambertini and D. Sasaki, Non-Negative Quantity Constraints and the Duration of Punishment, The Japanese Economic Review, vol.53, issue.1, pp.77-93, 2002.
DOI : 10.1111/1468-5876.00214

V. E. Lambson, Optimal Penal Codes in Price-setting Supergames with Capacity Constraints, The Review of Economic Studies, vol.54, issue.3, pp.385-397, 1987.
DOI : 10.2307/2297565

V. E. Lambson, Some Results on Optimal Penal Codes in Asymmetric Bertrand Supergames, Journal of Economic Theory, vol.62, issue.2, pp.444-468, 1994.
DOI : 10.1006/jeth.1994.1025

M. C. Levenstein and V. Y. Suslow, What Determines Cartel Success?, Journal of Economic Literature, vol.44, issue.1, pp.43-95, 2006.
DOI : 10.1257/002205106776162681
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.199.1575

D. Majerus, Price vs. quantity competition in oligopoly supergames, Economics Letters, vol.27, issue.3, pp.293-297, 1988.
DOI : 10.1016/0165-1765(88)90186-3

M. Motta, Competition Policy: Theory and Practice, 2004.
DOI : 10.1017/CBO9780511804038

L. P. Osterdal, A note on the stability of collusion in differentiated oligopolies, Research in Economics, vol.57, issue.1, pp.53-64, 2003.
DOI : 10.1016/S1090-9443(02)00055-8

T. W. Ross, Cartel stability and product differentiation, International Journal of Industrial Organization, vol.10, issue.1, pp.1-13, 1992.
DOI : 10.1016/0167-7187(92)90043-X

J. J. Rotemberg and G. Saloner, A supergame-theoretic model of price wars during booms, American Economic Review, vol.76, issue.3, pp.390-407, 1986.

R. Rothschild, Cartel stability when costs are heterogeneous, International Journal of Industrial Organization, vol.17, issue.5, pp.717-734, 1999.
DOI : 10.1016/S0167-7187(97)00052-0

G. Symeonidis, In Which Industries is Collusion More Likely? Evidence from the UK, Journal of Industrial Economics, vol.48, issue.1, pp.45-74, 2003.
DOI : 10.1111/1468-0335.00217

H. Vasconcelos, Tacit collusion, cost asymmetries and mergers, RAND Journal of Economics, vol.36, issue.1, pp.39-62, 2005.

B. Wernerfelt, Tacit collusion in differentiated cournot games, Economics Letters, vol.29, issue.4, pp.303-306, 1989.
DOI : 10.1016/0165-1765(89)90206-1