Of the American institutionalists, his most generous comments concerned Commons’s work, work that he regarded as hopelessly unsystematic but highly ‘… - Frank Knight

In spite of all the foregoing, there is a science of economics, a true, and even exact, science, which reaches laws as universal as those of mathematics and mechanics. The greatest need for the development of economics as a growing body of thought and practice is an adequate appreciation of the meaning, and the limitations, of this body of accurate premises and rigorously established conclusions. It comes about in the same general way as all science, except perhaps in a higher degree, i.e., through abstraction. There are no laws regarding the content of economic behavior, but there are laws universally valid as to its form. There is an abstract rationale of all conduct which is rational at alt, and a rationale of all social relations arising through the organization of rational activity.

[In 1932, Lionel Robbins declared economics ‘the science of choice’ (Robbins 1932). In the same year, when students at the University of Chicago opened their social sciences course reader, they read Knight’s response:] Such definitions come too near to saying that economics is the science of things generally, of everything that men are for practical reasons interested in. Such a definition is useless and misleading

Most striking feature... is the author’s failure to understand the elementary mechanics of the competitive economic organization.