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The capital controversy

Summary:
From Lars Syll As every mainstream textbook on growth theory, most mainstream economists choose to turn a blind eye to the concept of capital and the Cambridge controversy over it and pretend it’s much fuss about nothing. But they are wrong! The production function has been a powerful instrument of miseducation. The student of economic theory is taught to write Q = f(L, K) where L is a quantity of labor, K a quantity of capital and Q a rate of output of commodities. He is instructed to assume all workers alike, and to measure L in man-hours of labor; he is told something about the index-number problem in choosing a unit of output; and then he is hurried on to the next question, in the hope that he will forget to ask in what units K is measured. Before he ever does ask, he has become

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from Lars Syll

As every mainstream textbook on growth theory, most mainstream economists choose to turn a blind eye to the concept of capital and the Cambridge controversy over it and pretend it’s much fuss about nothing. But they are wrong!

The capital controversy

The production function has been a powerful instrument of miseducation. The student of economic theory is taught to write Q = f(L, K) where L is a quantity of labor, K a quantity of capital and Q a rate of output of commodities. He is instructed to assume all workers alike, and to measure L in man-hours of labor; he is told something about the index-number problem in choosing a unit of output; and then he is hurried on to the next question, in the hope that he will forget to ask in what units K is measured. Before he ever does ask, he has become a professor, and so sloppy habits of thought are handed on from one generation to the next.

Joan Robinson

As Edwin Burmeister admitted already twenty years ago:

It is important, for the record, to recognize that key participants in the debate openly admitted their mistakes. Samuelson’s seventh edition of Economics was purged of errors. Levhari and Samuelson published a paper which began, ‘We wish to make it clear for the record that the nonreswitching theorem associated with us is definitely false’ … Leland Yeager and I jointly published a note acknowledging his earlier error and attempting to resolve the conflict between our theoretical perspectives … However, the damage had been done, and Cambridge, UK, ‘declared victory’: Levhari was wrong, Samuelson was wrong, Solow was wrong, MIT was wrong and therefore neoclassical economics was wrong. As a result there are some groups of economists who have abandoned neoclassical economics for their own refinements of classical economics. In the United States, on the other hand, mainstream economics goes on as if the controversy had never occurred. Macroeconomics textbooks discuss ‘capital’ as if it were a well-defined concept — which it is not, except in a very special one-capital-good world (or under other unrealistically restrictive conditions). The problems of heterogeneous capital goods have also been ignored in the ‘rational expectations revolution’ and in virtually all econometric work.

Edwin Burmeister

About Lars Syll
Lars Syll
Lars Jörgen Pålsson Syll (born November 5, 1957) is a Swedish economist who is a Professor of Social Studies and Associate professor of Economic History at Malmö University College. Pålsson Syll has been a prominent contributor to the economic debate in Sweden over the global financial crisis that began in 2008.

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