Ultimately, though, Friedman's "Methodology of Positive Economics" was oriented not to the philosophy of science but to economics," and his stance provoked sharp debate within the profession. The best-known opponent of Friedman's position was Paul Samuelson, an economist at the Massachusetts Institute of Technology. With Foundations of Economic Analysis (1947) and other works, Samuelson played a big part in the mathematicization of economics in the postwar United States. He wrote the discipline's definitive postwar textbook (Economics, which sold some 4 million copies"), and in 1970 he was the third recipient of the Prize in Economic Sciences in Memory of Alfred Nobel.

Donald MacKenzie, An Engine, Not a Camera, loc. 57