From 1957 he was chairman of the Radcliffe Committee, called to enquire into the working of the monetary and credit system. The committee published a report known as the Radcliffe report which suggested reforms on how monetary policy is run. He was also a frequent public speaker and wrote numerous books: he gave the BBC Reith Lecture in 1951 – a series of seven broadcasts titled Power and the State which examined the features of democratic society, and considered the problematic notions of power and authority. He also presented the Oxford University Romanes Lecture in 1963 on Mountstuart Elphinstone.