Keynes and Hayek, the Great Debate (Part 1): Nicholas Wapshott

The greatest debate in the history of economics began with a simple request for a book. In the early weeks of 1927, Friedrich Hayek, a young Viennese economist, wrote to John Maynard Keynes at King’s College, Cambridge, in England, asking for an economic textbook written 50 years before: Francis Ysidro Edgeworth’s exotically titled “Mathematical Psychics.” Keynes replied with a single line on a plain postcard: “I am sorry to say that my stock of ’Mathematical Psychics’ is exhausted.”

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