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Interest and the Marginal Product of Capital: A Critique of Samuelson

Published online by Cambridge University Press:  11 June 2009

Robert P. Murphy
Affiliation:
Visiting Scholar, New York University.

Extract

The association of the equilibrium real rate of interest with the marginal product of capital is a staple of modern mainstream economics. Indeed, when graduate students are asked to find a typical model's equilibrium values of the real wage and interest rate, there is apparently nothing more natural than calculating the derivative of the production function with respect to labor and capital, respectively. This seems to make perfect economic sense, because under competitive conditions, the laborer gets paid the marginal product of his labor, while the capitalist gets paid the marginal product of his capital. Students can even derive the “factor-price frontier” (developed in, for example, Samuelson 1953) to show the inverse relationship between real wages and the real rate of interest, where the “factors” are, of course, labor and capital.

Type
Research Article
Copyright
Copyright © The History of Economics Society 2007

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References

REFERENCES

Böhm-Bawerk, Eugen von (1881) Capital and Interest (3 vols. in 1) (South Holland: Libertarian Press, 1959).Google Scholar
Cohen, Avi J. (1989) Prices, Capital, and the One-commodity Model in Neoclassical and Classical Theories, History of Political Economy, 21 (2), pp. 231–51.CrossRefGoogle Scholar
Fetter, Frank A. (1977) Capital, Interest, and Rent: Essays in the Theory of Distribution, Introduction by Rothbard, Murray N. (Ed) (Kansas City: Sheed, Andrews, and McMeel).Google Scholar
Fisher, Irving (1930) The Theory of Interest (Philadelphia, PA: Porcupine Press, 1977).Google Scholar
Garegnani, P. (1970) Heterogeneous Capital, the Production Function and the Theory of Distribution, The Review of Economic Studies, 37 (07), pp. 407–36.CrossRefGoogle Scholar
Kirzner, Israel (1996) Essays on Capital and Interest (Brookfield, VT: Edward Elger Publishing, Ltd.).CrossRefGoogle Scholar
Murphy, Robert P. (2005) Dangers of the One-Good Model: Böhm-Bawerk's Critique of the “Naïve Productivity Theory” of Interest, Journal of the History of Economic Thought, 27 (12), pp. 375–82.CrossRefGoogle Scholar
Pasinetti, L. L. (1966) Changes in the Rate of Profit and Switches of Techniques, Quarterly Journal of Economics, 80 (4), pp. 503–17.CrossRefGoogle Scholar
Robinson, Joan (19531954) The Production Function and the Theory of Capital, The Review of Economic Studies, 21 (2), pp. 81106.Google Scholar
Samuelson, Paul A. (1943) Dynamics, Statics, and the Stationary State, The Review of Economic Statistics, 25 (02), pp. 5868.CrossRefGoogle Scholar
Samuelson, Paul A. (1953) Prices of Factors and Goods in General Equilibrium, The Review of Economic Studies, 21 (1), pp. 120.CrossRefGoogle Scholar
Samuelson, Paul A. (1957) Wages and Interest: A Modern Dissection of Marxian Economic Models, The American Economic Review, 47 (12), pp. 884912.Google Scholar
Samuelson, Paul A. (1966) A Summing Up, The Quarterly Journal of Economics, 80 (4), pp. 568–83.CrossRefGoogle Scholar
Samuelson, Paul A. (1970) Law of Conservation of the Capital-Output Ratio, Proceedings of the National Academy of Sciences of the United States of America, 67 (01 15), pp. 1477–79.CrossRefGoogle ScholarPubMed
Samuelson, Paul A. (1981) Schumpeter as an Economic Theorist, in: Frisch, Helmut (Ed), Schumpeterian Economics (New York: Praeger Publishers), pp. 127.Google Scholar
Samuelson, Paul A. (1983) Thünen at Two Hundred, Journal of Economic Literature, 21 (12), pp. 1468–88.Google Scholar
Samuelson, Paul A. (1991) Sraffa's Other Leg, The Economic Journal, 101 (05), pp. 570–74.CrossRefGoogle Scholar
Samuelson, Paul and Solow, Robert (1956) A Complete Capital Model Involving Heterogeneous Capital Goods, The Quarterly Journal of Economics, 70 (11), pp. 537–62.CrossRefGoogle Scholar
Schumpeter, Joseph A. (1912) The Theory of Economic Development (Cambridge, MA: Harvard University Press).Google Scholar
Sraffa, Piero (1960) The Production of Commodities by Means of Commodities (Cambridge: Cambridge University Press).Google Scholar