The Key Problem with Friedman’s Fisherine Approach Is the Same Orthodox Separation of the Micro and Macro Spheres

The third major feature of the New Deal program was proto-Keynesian: the planning of the “macro” sphere by the government in order to iron out the business cycle. In his approach to the entire area of money and the business cycle—an area on which unfortunately Friedman has concentrated most of his efforts—Friedman harks back not only to the Chicagoans, but, like them, to Yale economist Irving Fisher, who was the Establishment economist from the 1900s through the 1920s. Friedman, indeed, has openly hailed Fisher as the “greatest economist of the twentieth century,” and when one reads Friedman’s writings, one often gets the impression of reading Fisher all over again, dressed up, of course, in a good deal more mathematical and statistical mumbo-jumbo.

But the key problem with Friedman’s Fisherine approach is the same orthodox separation of the micro and macro spheres that played havoc with his views on taxation. For Fisher believed, again, that on the one hand there is a world of individual prices determined by supply and demand, but on the other hand there is an aggregate “price level” determined by the supply of money and its velocity of turnover, and never the twain do meet. The aggregate, macro, sphere is supposed to be the fit subject of government planning and manipulation, again supposedly without affecting or interfering with the micro area of individual prices.

--Murray N. Rothbard, "Milton Friedman Unraveled," in Economic Controversies (Auburn, AL: Ludwig von Mises Institute, 2011), 903-904.