There were many Hayeks: Hayek, the political scientist; Hayek, the economist; Hayek, the philosopher of social science; Hayek, the psychologist. Even… - Mark Blaug

Why did his interest in the concept of spontaneous order and the history of the doctrine of unintended social consequences undergo very little development after the 1960s? All of his political writings are in fact amazingly repetitious, exploring a small number of big themes which, however, are not further refined or extended in new contexts. As organizing concepts, they held, I am convinced, enormous potentialities but nevertheless Hayek himself failed to realize them.

Joan Robinson's much-awaited textbook in “modern economics” perfectly exemplifies the typical attitude of Cambridge economists to micro-economics. The whole of traditional price theory is covered in one chapter … [some] prices are formed by conventional mark-ups on prime costs, the level of the mark-up itself being left unexplained. Apart from this chapter, the book is doggedly macro-economic in treatment … A striking omission from the book is any mention of the closely related concepts of externalities and public goods, which most economists would nowadays regard as the basic ingredients of “market failure” that has come to be fruitfully applied … to problems of pollution and congestion.

The Lange idea of managers following marginal cost-pricing rules because they are instructed to do so, while the central planning board continually alters the prices of both producer and consumer goods so as to reduce their excess demands to zero, is so administratively naive as to be positively laughable. Only those drunk on perfectly competitive, static equilibrium theory could have swallowed such nonsense. ... in all the recent calls for reform of Soviet bloc economies, no one has ever suggested that Lange was of any relevance whatsoever. And still more ironically, Lange’s “market socialism” is, on its own grounds, socialism without anything that can be called market transactions.