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.