This volume contains selected papers presented at the International Symposium on 'Economics of Eco­ system Management' held in Halkidiki, Greece from 26 to 30 September 1983. The meeting was designed to consider as much as possible the interaction between the economy and ecology, and in parallel to provide a forum for the presentation of the ecological and developmental initiatives of the Ministry of Youth of Greece. As chairman of the organizing committee I want to express our thanks to OECD, EEC and UNESCO for sponsoring the Symposium. From Greece the Ministries of Culture and Environment are gratefully acknowl­ edged. Last but not least, I want to express our sincere thanks for the continuous support to the Ministry of Youth and Sports of Greece, and especially to the Minister Mr. Kostas Laliotis because he not only adopted the idea for sponsoring events like this, but also because of his interest which became obvious with his presence and talk during the meeting. The staff of the Ecology Division, namely Drs. M. Arianoutsou and D. Vokou, Messrs. J. Pandis, Th.A. Mardiris, S. Paraskevopoulos and Miss A. Papagianni provided great help concerning the organization, as well as Mrs. A. Karamanli-Vlahopoulou, my secretary, who is always behind these events. N.S. Margaris Contents Preface by N. S. Margaris V List of contributors VIII PART ONE: INTRODUCTION 1. Opening address by G. Schneider ................................................................. .