Rosa Luxemburg maintained that the capitalist system can keep up its r — Joan Robinson

"Until recently, Marx used to be treated in academic circles with contemptuous silence, broken only by an occasional mocking footnote. But modern developments in academic theory, forced by modern developments in economic life — the analysis of monopoly and the analysis of unemployment — have shattered the structure of orthodox doctrine and destroyed the complacency with which economists were wont to view the working of laissez-faire capitalism. Their attitude to Marx, as the leading critic of capitalism, is therefore much less cocksure than it used to be. In my belief, they have much to learn from him."

"Marx, however imperfectly he worked out the details, set himself the task of discovering the law of motion of capitalism, and if there is any hope of progress in economics at all, it must be in using academic methods to solve the problems posed by Marx."

"The purpose of studying economics is not to acquire a set of ready-made answers to economic questions, but to learn how to avoid being deceived by economists."

"The bastard Keynesian doctrine, evolved in the United States, invaded the economic faculties of the world, floating on the wings of the almighty dollar."

"Instead, I would concede her a point of uncertain importance. There isnt really a great deal to economics, considered as a logical structure based upon a few indisputable axioms about the world. … A logician is a wondrous creature, but he cannot distinguish between the two simple errors: if A = B, and B = C, then (1) A = 1.01C, and (2) A = 10⁶⁵C. An economist can."

"The orthodox doctrines of economics which were dominant in the last quarter of the nineteenth century had a clear message. They supported laisser faire, free trade, the gold standard, and the universally advantageous effects of the pursuit of profit by competitive private enterprise."