I. Extensions of the Predator-Prey-Model of a Growth Cycle.- Implications of Workers' Savings for Economic Growth and the Class Struggle.- Alternative Monetary Policies in a Classical Growth Cycle.- Unemployment Insurance and Cyclical Growth.- A Generalization of R.Goodwin's Model with Rational Behaviour of Economic Agents.- Disaggregating Models of Fluctuating Growth.- II. Further Contributions to a Theory of Fluctuating Growth.- Cyclical Input Demands and the Adjustment Cost Theory of the Firm.- Long-Term Growth and the Cyclical Restoration of Profitability.- The Inflation-Based 'Natural' Rate of Unemployment and the Conflict over Income Distribution.- Cyclical and Structural Aspects of Unemployment and Growth in a Nonlinear Model of Cyclical Growth.- III. On New Mathematical Methods and Methodological Concepts.- Some New Techniques for Modelling Nonlinear Economic Fluctuations: A Brief Survey.- Synergetics and Dynamic Economic Models.- Embodied Technical Progress in a Dynamic Economic Model: The Self-Organization Paradigm.- Fluctuations and Growth: Keynes, Schumpeter, Marx, and the Structural Instability of Capitalism.- IV. Econometric Models.- Cyclical Growth in a Nonlinear Macrodynamic Model of the Italian Economy.- An Econometric Model of the Shares of Wages in National Income: UK 1855-1965.