Sir Alfred William Flux CB (8 April 1867 – 16 July 1942) was a British economist and statistician.Flux was born in the Landport district of Portsmouth in 1867, the son of a cement maker. He attended Portsmouth Grammar School then studied mathematics at St John's College, Cambridge where he was a Senior Wrangler in 1887 (sharing the honour in a tie with three others). While at Cambridge he became friends with Alfred Marshall, who interested him in economics.