Dennison was born on 15 June 1912 in North Shields, the son of an official in a local gas company. He died on 22 November 1992 in Newcastle upon Tyne. After completing a BA at Durham in 1933, Dennison became an affiliated undergraduate at Trinity College, Cambridge. He graduated with first-class honours in 1935. From 1935–9 he was an assistant lecturer at the University of Manchester, affiliated with the Economic Research Division. In 1939 he was elected to a chair in Economics at University College, Swansea. Between 1940 and 1944, he was chief economic assistant in the economic section of the War Cabinet Secretariat, working on air pollution, land utilization and medical remuneration, a job he pursued with the encouragement of John jewkes. In 1946 he was awarded a CBE for his contribution to the war effort. Following the war, he became Senior tutor and director of studies (economics) at Gonville and Caius College, Cambridge (1945–58), a period overlapping with Milton Friedman's visiting fellowship (1953–4). Dennison's later writings (for example, on education, on unions and other professional associations) reflect many parallels with the political views famously expressed by Milton and Rose Friedman (1979).
From The Biographical Dictionary of British Economists in Oxford Reference.