| published in: | FS Möschel, Baden-Baden, Nomos, pp. 227-240, 2011. |
| published in: | Research in Economics, vol. 66, issue 2009/32, no. 3, Bonn, Max Planck Institute for Research on Collective Goods, pp. 239-245, 2012. |
| published in: | Competition Policy and the Economics Approach, Cheltenham, pp. 245-269, 2011. |
| published in: | Telecommunications Policy, vol. 31, pp. 530-540, 2007. |
| published in: | Journal of Competition Law and Economics, vol. 3, pp. 491-549, 2007. |
| published in: | Journal of Economics & Management Strategy, vol. 17, no. 1, pp. 113-148, 2008. |
| published in: | Journal of Economics & Management Strategy, vol. 20, no. 4, pp. 1043-1071, 2011. |
| forthcoming in: | Journal of Industrial Economics, In Press. |
| published in: | European Economic Review, vol. 53, no. 4, pp. 461-480, 05/2009. |
| published in: | Recht und spontane Ordnung. Festschrift für Ernst-Joachim Mestmäcker zum 80. Geburtstag, Baden-Baden, Nomos, pp. 155-198, 2006. |