On superimposed recurrent cycles (Q579109)

[This is a shortened version of the authors' review. The full text is available on request.] The article presents a methodological device for a synthesis between the theories of self-sustaining cycles and the hypothesis of identifiable exogenous shocks. Central to this is the hypothesis that fluctuations in economic time series are essentially recurrent. First it is shown how it is possible to combine enough cosine functions to approximate any given time series. Then a numerical example is presented, which is meant to illustrate that the framework proposed can be given empirical content. And at least the method is applied to some time series of real life such as the rate of capacity utilization in U.S. manufacturing.