Karl Mosler hat seine statistische und mathematische Ausbildung in Heidelberg und München erhalten. Er hat Statistik und Operations Research an wirtschaftswissenschaftlichen Fakultäten, u.a. in Hamburg und Frankfurt/O. gelehrt. Seit 1995 ist er Professor für Statistik und Ökonometrie an der Universität zu Köln.

I Economic Theory.- I.1 Macroeconomic Models.- Investment in Inventory.- Tatonnement Processes with Set-Valued Excess-Demand.- De Minimis Non Curat Praetor or: There Might Be Small Disadvantages in Foreign Trade.- Hidden Symmetries: Lie Groups and Economic Conservation Laws.- I.2 Production and Price Theory.- Sequences of Mechanistic Price Indices.- A Logical Foundation of the Cost of Living Index.- On the Construction of Utility Functions Which Correspond to Homogeneous Demand Systems.- I.3 Game-Theoretic Models.- Are Cartel Laws Bad for Business?.- On the Value of Market Information and Rational Expectations.- I.4 Spatial Economics.- The Von Thünen-Hotelling Rule: On Johann Heinrich von Thünen's Model of General Economic Interdependence in Space and Time.- The Locational Behaviour of the Chemical Industry in the United States After World War II.- Location Theory of the Firm Facing Uncertain Prices and Transport Rates.- On the Art of Successful Analogy Formation: Martin Beckmann's Continuous Model of Economic Space.- II Stochastics and Decision Theory.- Reduction of State Space in Dynamic Programming with Integrated Forecasting.- The Foundations of Probability.- An Optimization Problem in Assemblage Systems.- Optimal Replacement under Differing Amounts of Information.- Lower-Bound Benefits of Air Pollution Reductions in the Munich Metropolitan Area (MMA).- Evolution of Organizations.- Asymptotic Optimality of Differentiated SPRT's for Composite Hypotheses.- Dynamic Linear Models with Rational Expectations of Current Endogenous Variables.- Continuous Linear Representations of Preference Orderings in Vector Spaces.- III Computational Problems.- Optimal Routes in Compound Transportation Systems.- Greedy Solutions for General Set Covering Problems.- The German Nonlinear Income Tax Scale in Linear Programming Models - Linear Approximations and Error Analysis.- Can the Ellipsoid Method Be Efficient?.- A Dual Quadratic Programming Algorithm.- Computational Problems in Economics.- List of Contributors.

Martin Beckmann is going to celebrate his sixtieth birthday. This is almost unbelievable considering the vitality, ingenuity, and activity which he continues to show as he always did. It is an honor able and pleasant duty for the whole economics community to show hirn the respect, gratitude, and affection which he deserves. Thus, those' who have contributed to this festschrift may be thought of as a dele gation from a much larger community in which all of us are joined; the editors in particular feel deeply connected with and enriched by the personality and scientific work of Martin Beckmann. Martin Beckmann is one of those rare scholars who are not narrow minded specialists in one field; he has been active in many areas of economics and operations research which rapidly developed since World War 11, and he has contributed original and fruitful ideas in almost all of them. The variety of topics treated in this volume aims to re flect the impressive width of his scientific interests.