This chapter summarises the key outcomes of Kahn’s intellectual endeavours from 1951, when he was appointed Professor at the University of Cambridge, to 1959, when he chaired an international group of inflation experts. During this period, Kahn published an important essay on liquidity preference, in which he set out his original theory of the relationship between interest rates at different maturities and the demand for money for precautionary or speculative purposes. He presented these ideas, along with his views on inflation, to the Radcliffe Committee (1958–1959), thereby contributing to the formulation of the monetary doctrine that dominated the United Kingdom until the 1970s. Kahn also made a significant contribution to Keynesian theories of growth and distribution by building upon Joan Robinson’s work in The Accumulation of Capital.