He became Director of Studies for economics students at King's College in 1947, a post he held for four years.
Kahn was appointed professor of economics in 1951, and succeeded Keynes as Bursar of King's College.
[4] His findings on the multiplier were first published in his 1931 article, "The Relation of Home Investment to Unemployment".
[5] There has been extensive debate on whether Kahn's thinking on the multiplier was foreshadowed or aided by the work of other economists such as Lyndhurst Giblin.
[7] Kahn was made a Commander of the Order of the British Empire (CBE) in 1946[8] and became a Fellow of the British Academy in 1960, and was created a life peer with the title Baron Kahn, of Hampstead in the London Borough of Camden on 6 July 1965.