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Journal Article Substitution and Fixed Proportions in the Theory of Capital Get access Robert M. Solow Robert M. Solow Cambridge, Mass. and Washington, D.C. Search for other works by this author on: Oxford Academic Google Scholar The Review of Economic Studies, Volume 29, Issue 3, June 1962, Pages 207–218, https://doi.org/10.2307/2295955 Published: 01 June 1962
Robert M. Solow (Fri,) studied this question.