B. van Rootselaar - Böcker

This volume contains the texts of the lectures presented at the scientific meetings of 9 May 1970 and 23 January 1971 of the Systeemgroep Nederland. This society was founded on 9 May 1970 to promote interdisciplinary scientific activity on basis of a systems approach. It has its seat in Utrecht. Officers for the year 1971: President: A. F. G. Hanken, Technische Hogeschool Twente, Enschede. Secretary: G. de Zeeuw, Department of Psychology, University of Amsterdam. Treasurer: R. F. Geyer, Foundation for Interuniversitary Social Research. SISWO, Amsterdam. All information about the society can be obtained from the Secretary. Although this volume is entirely devoted to the lectures of the scientific meetings, future issues, to be collected into yearly volumes, are open to individ- ual contributors. For details cf. p. II The editor v ADDRESSES OF AUTHORS Buijs, B. G. F., Technische Hogeschool Twente, Postbox 217, Enschede. Griend, P. C. van de, Nederlandse Economische Hogeschool, Burg. Oudlaan 50, Rotterdam. Hanken, A. F. G., Technische Hogeschool Twente, Postbox 217, Enschede. Leeuw, A. C. J. de, Technische Hogeschool, Insulindelaan 2, Eindhoven. Maarschalk, C. G. D.,Zomerluststraat 11, Haarlem. Mantz, M. R., Trompenbergerstraat 7, Hilversum. Meuwese, W., Technische Hogeschool, Insulindelaan 2, Eindhoven. Rootselaar, B. van, Landbouwhogeschool, Afdeling Wiskunde, De Dreijen 8, Wageningen. Wassink, E. C., Landbouwhogeschool, Afde1ing Plantenphysiologie, Gen. Foulkesweg 72, Wageningen.

The Netherlands Society for Systems Research was founded on 9 May 1970 to promote interdisciplinary scientific activity on basis of a systems approach. It has its seat in Utrecht, The Netherlands. Officers for the year 1973: President: A. Bosman, University of Groningen. Secretary: G. de Zeeuw, Department of Psychology, University of Amsterdam. Treasurer: J. Herbschleb, Computer Laboratory, Department of Cardiology, University Hospital, Catharijnesingel 101, Utrecht. All information about the society can be obtained from the Secretary. The editor ADDRESSES OF AUTHORS Gottinger, H. W., Bayerische Akademie der Wissenschaften, Commission for Development Research, 8000 Munchen 22, Marstallplatz 8, W. Germany. Mulder, M., Stichting Bedrijfskunde, Poortweg 6, Delft, The Netherlands. Olsder, G. J., Strijbos, R. C. W., Department of Applied Mathematics, Twente of Technology, P.O. Box 217, Enschede, The Netherlands. University Rasch, R. A., Instituut voor Cognitie Onderzoek, University of Amsterdam, Weesperplein 8, Amsterdam, The Netherlands. Rootselaar, B. van, Department of Mathematics, de Dreijen 8, Wageningen, The Netherlands. Sitter, L. U. de, Department of Social Sciences, Technological University, Eindhoven, The Netherlands.

The Netherlands Society for Systems Research was founded on 9 May 1970 to promote interdisciplinary scientific activity on basis of a systems approach. It has its seat in Utrecht, The Netherlands. Officers for the years 1975/1976: President: G. Broekstra, University of Delft Secretaries: G. De Zeeuw, University of Amsterdam (acting secretary) G. R. Eyzenga, University of Groningen Treasurer: J. N. Herbschleb, Computer Laboratory, Department of Cardio- logy, University Hospital, CatharijnesingellOl, Utrecht. All information about the society can be obtained from the acting secretary. The editor is happy to announce that H. Koppelaar from the State University Utrecht will act as associate editor of the Journal. Moreover, the following scientists have declared to be willing to act as member of the editiorial board: Professor G. Klir, State University of New York, Binghamton, New York, U.S.A. Professor S. Braten, Institute of Sociology, University of Oslo, Blindern, Norway Professor B. R. Gaines, Department of Electrical Engineering Science, Univer- sity of Essex, Colchester, U.K. Professor Maria Nowakowska, Department of Praxiology, Polish Academy of Sciences, Warszawa, Poland.Professor F. Pichler, Department of Systems Theory, Johannes Kepler Univer- sity, Linz-Auhof, Austria. Professor B. Zeigler, Department of Applied Mathematics, Weizmann Institute of Science, Rehovot, Israel. The editor ADDRESSES OF AUTHORS Broekstra, G., Graduate School of Management, Poortweg 6-8, Delft, The Netherlands. Dalenoort, G. J., Institute for experimental psychology, State University Groningen, Biological Centre, Section D, Kerklaan 30, Haren (Gr.), The Netherlands.

The Netherlands Society for Systems Research was founded on 9 May 1970 to promote interdisciplinary scientific activity on basis of a systems approach. It has its seat in Utrecht, The Netherlands. Officers for the year 1978: President: G. Broekstra, Graduate School of Management, Delft Secretary: N. J. T. A. Kramer, Department ofIndustrial Engineering, Eindhoven University of Technology, Postbus 513, Eindhoven. Treasurer: J. N. Herbschleb, University of Utrecht. All information about the society can be obtained from the secretary. The editor ADDRESSES OF AUTHORS Boot, M. , Institute of Applied and Computational Linguistics, State University Utrecht, Wilhelminapark 11, Utrecht, The Netherlands Broekstra, G. , Graduate School of Management, Poortweg 6--8, Delft, The Netherlands Dijkstra, W. , Free University, Department of Research Methods, De Boele- laan 1115, Amsterdam, The Netherlands V. J. J. P. , University of Leiden, Institute of Phonetics, Schut- Van Heuven, tersveld 9, Leiden, The Netherlands Kooijman, S. A. L. M. , Central Lab. TNO, Postbus 217, Delft, The Nether- lands Koppelaar, H., State University Utrecht, Department of Psychology, Model- and Statistics Group, Jacobsstraat 14, Utrecht, The ling, Psychometrics Netherlands Kruijt, D. , State University Utrecht, Department of Sociology, Center for Comparative Socio-economic studies, Heidelberglaan 2, Utrecht, The Netherlands Metz, H. A. J. , University of Leiden, Institute of Theoretical Biology, Stations- weg 25, Leiden, The Netherlands Verhoeff, J. , Erasmus University, Rotterdam, The Netherlands Van der Zouwen, J.