here for the first time. We are grateful to all those who have contributed to this volume for their willingness to participate in the project. Without their co-operation this book would not have been possible. We should like, in addition, to thank Angela Spence for her careful linguistic editing and assistance in co-ordinating the production of the camera ready copy. Lastly, but not least, we wish to express our gratitude for support from our home institutions, and in particular the Austrian Academy of Sciences (Institute for Urban and Regional Research), the Austrian Ministry for Science and Transport, the Styrian Government (Section for Science and Research) and the Federation of Austrian Industry in Styria for the financial backing received. April 1999 Manfred M.