This volume contains the results of the International Conference on "Man- aging Enterprises ofthe New Economy by Modem Concepts ofthe Theory ofthe Firm," which took place in Hagen from 12-14 December 2002. The conference was organised jointly by the FernUniversitat in Hagen and the Erich-Gutenberg-Arbeitsgemeinschaft in Cologne. The Deutsche For- schungsgemeinschaft, the FernUniversitat and the Markische Bank in Hagen provided generous financial support for the conference, and in fact enabled its implementation and the publication of this record of the pro- ceedings. We would like to express...