1 Retraction to: ZfB 77. Jg. (2007), H. 4 DOI 10.1007/s11573-007-0036-1

To avoid any violation of privacy this News article titled ‘Geburtstage’ has been retracted by Springer following a change in content policy by the Editorial Office as announced in Zeitschrift für Betriebswirtschaft (2011) 81(1):1–4 (former title of Journal of Business Economics).