A sample of Professor T?nu Puus contributions to economic theory, ranging from seminal results on investment criteria under imperfect capital markets, via rules for optimal resource extraction when the grade of the ore is heterogeneous, to modern nonlinear dynamics as applied to well-known economic fields such as business cycle analysis and oligopoly theory. Puus thinking on cultural economics and his views on the methodology of economic science shine through every paper in this volume.Preface; A.E. Andersson, T?nu Puu - Economic Analyst and Cultural Activist; M. Beckmann, T?nu Puu and I - In Collaboration; K.-G. L?fgren, T?nu Puu at the Department of Economics, Ume? University.- Microeconomics: Some Reflexions on the Theories of Choice Between Alternative Investment Opportunities; Complementarity, Substitutivity and Regressivity in the Theory of Production; Some Comments on 'Inferior' (Regressive) Inputs; Free Entry and Efficient Distribution of Inputs in a One-product Industry; On the Profitability of Exhausting Natural Resources.- Spatial Economics: Towards a Theory of Optimal Roads; Catastrophic Structural Change in a Continuous Regional Model; Multiplier-accelerator Models Revisited; Pattern Formation in Spatial Economics; The Chaotic Monopolist.- Philosophy of Science: A Graphical Solution of Second-Order Homogeneous Difference Equations; Some Reflections on the Relation Between Economic Theory and Empirical Reality; On Progress and Perfection in the Arts and Sciences.- Curriculum Vitae.- The Collected Scientific Works of T?nu Puu.Collection of most of the best papers written by T?nu Puu, a creative economic theoretician and analyst of culture, arts and society The papers in this volume amply demonstrate T?nu Puu's excellence as a scientist. Springer Book ArchivesDE