Solow’s Harrod: Transforming Cyclical Dynamics into a Model of Long-run Growth

Verena Halsmayer and Kevin Hoover ()

No 2013-02, Center for the History of Political Economy Working Paper Series from Center for the History of Political Economy

Abstract: Modern growth theory derives mostly from Robert Solow’s “A Contribution to the Theory of Economic Growth” (1956). Solow’s own interpretation locates the origins of his “Contribution” in his view that the growth model of Roy Harrod implied a tendency toward progressive collapse of the economy. He formulates his view in terms of Harrod’s invoking a fixed-coefficients production function. We challenge Solow’s reading of Harrod’s “Essay in Dynamic Theory,” arguing that Harrod’s object in providing a “dynamic” theory had little to do with the problem of long-run growth as Solow understood it, but instead addressed medium-run fluctuations, the “inherent instability” of economies. It was an attempt to isolate conditions under which the economy might tend to run below potential. In making this argument, Harrod does not appeal to a fixed-coefficients production function – or to any production function at all, as that term is understood by Solow. Solow interpreted Harrod’s “Essay” in the light of a particular culture of understanding grounded in the practice of formal modeling that emerged in economics in the post-World War II period. The fate of Harrod’s analysis is a case study in the difficulties in communicating across distinct interpretive communities and of the potential for losing content and insights in the process. From Harrod’s English Keynesian point of view, Solow’s interpretation arose out of a culture of misunderstanding, and his objects – particularly, of trying to account for a tendency of the economy toward chronic recessions – were lost to the mainstream literature.

Keywords: economic growth; Roy Harrod; Robert Solow; dynamics; dynamic instability; knifeedge; warranted rate of growth; natural rate of growth (search for similar items in EconPapers)
JEL-codes: B22 B31 E12 E13 N1 O4 (search for similar items in EconPapers)
Pages: 48
Date: 2013
New Economics Papers: this item is included in nep-his, nep-hme, nep-hpe and nep-pke
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