VOLUME IV Equilibrium and the Business Cycle: Introduction Adolf Löwe, ‘How is Business Cycle Theory Possible at All?’ Friedrich August von Hayek, ‘The Problem of the Trade Cycle’ Eugen Slutzky, ‘The Summation of Random Causes as the Source of Cyclic Processes’ Simon Kuznets, ‘Equilibrium Economics and Business-Cycle Theory’ Erik Lundberg, ‘On the Concept of Economic Equilibrium’ Friedrich A. Lutz, extract from The Problem of Business Cycles in Economics Gustavo Del Vecchio, ‘On the Economic Theory of Crises’ J. R. Hicks, ‘Equilibrium and the Trade Cycle’ Ragnar Frisch, ‘Propagation Problems and Impulse Problems in Dynamic Economics’ Oskar Morgenstern, ‘Perfect Foresight and Economic Equilibrium’