Lyndhurst Falkiner Giblin was born in Hobart, Tasmania, in 1872 and died there in 1951. He studied mathematics at the University of Tasmania and at Cambridge. During WWW Giblin served with the AIF in France, rising to the rank of Major. Wounded a number of times, he was awarded the MC and the DSO. After the war he worked as a sailor, an orchardist, a teacher of ju-jitsu, a gold prospector and Member of Parliament. In 1919 Giblin was appointed the Tasmanian Government Statistician. In 1929 Giblin took up the Ritchie Chair in Economic Research at the University of Melbourne, a post he held until 1940. In his inaugural address in 1930, Giblin clearly enunciated the concept of the (export) multiplier, a discovery he had made independently of Keynes and others. Throughout his time at the University of Melbourne he was influential in public service including State and Federal government statistics and the Commonwealth Grants Commission.
On Giblin and his economic thought see Giblin's Platoon: The Trials and Triumph of the Economist in Australian Public Life by William Coleman, Selwyn Cornish and Alf Hagger (ANU E Press 2006). The entry in the Australian Dictionary of Biography (vol. 8, p 646ff) is by N Cain. More biographical information may be found in Douglas Copland's book, Giblin: The Scholar and the Man, Cheshire, Melbourne, 1960.
On Giblin and the multiplier, see R Dimand, The Origins of the Keynesian Revolution, Edward Elgar, 1988, Ch 4; N Cain, "Cambridge and its Revolutions. A Perspective on the Multiplier and Effective Demand", Economic Record, June 1979, pp 108-17 and D Patinkin, Anticipations of the General Theory, Blackwells, 1982, pp 189-99.