ABSTRACT
Ever since, in the sixties of the past century, Clement Juglar definitely established the existence of wave-like movements which pervade economic life within the institutional framework of capitalist society, the work of finding, linking-up, measuring relevant fact, has been steadily progressing. Common sense immediately suggests that here we have discovered an obviously important source of economic fluctuations. From the ubiquity of such events it follows that practically every economic fluctuation must be a historic individual and cannot be made amenable to explanation but by minute historical analysis of the innumerable factors actually at work in each case. The units of the cyclical movements, then, lie necessarily between neighborhoods of equilibrium. In the simplest form of the model of economic change they have only two phases. It should be added that the analytic model supplies an interpretation of economic trends which also bears on the technique of their determination.
