| published in: | Journal of Competition Law and Economics, vol. 3, pp. 491-549, 2007. |
| published in: | International Review of Law and Economics (IRLE), vol. 31, no. 1, pp. 16-20, 2011. |
| published in: | European Economic Review, vol. 53, no. 4, pp. 461-480, 05/2009. |