| Sir Arnold Plant | |
|---|---|
|  | |
| Born | 1898 | 
| Died | 19 April 1978 (aged 79–80) | 
| Nationality | British | 
| Influences | David Hume,Edwin Cannan | 
| Influenced | Ronald Coase,Arthur Lewis, Arthur Seldon | 
Sir Arnold Plant (1898 – 19 April 1978) was a British economist.
Plant was born in Hoxton, London, the son of a municipal librarian. After attending Strand School, he worked for a mechanical engineering organisation. At the advice of William Piercy, he set out to learn about management. He obtained a BCom degree (1922) and a BSc degree in Economics (1923; specialising in modern economic history) from the London School of Economics.
He worked as a professor at the University of Cape Town (1923–1930) and at the London School of Economics (1930–1965).
Plant's 1934 paper on patents, "The Economic Theory Concerning Patents for Inventions", is considered a classic.
In 1947, he was knighted.