Slater was born in Plymouth on 27 August 1864, and died in Oxford on 8 March 1938. As a Young man he was involved in the labour movement, and helped organize unions among unskilled workers in Plymouth following the 1889 dock strike. He then went on to further education and studied at St John's College, Cambridge, taking his BA in 1896 and his MA in 1897. He married Violet Oakeshott, also in 1897. Among his acquaintances in Cambridge was Graham wallas, who became a lifelong friend despite occasional professional disagreements; in 1932, Slater gave the address at the memorial meeting for Wallas held at the London School of Economics.
From The Biographical Dictionary of British Economists in Oxford Reference.