Edward Owen Giblin Shann (30 April 1884 – 23 May 1935, often written as E. O. G. Shann) was an Australian economist. At a time when Australia's dominant economic philosophy favoured protectionist tariffs, Shann championed a more liberal approach. He is perhaps best remembered for his prediction of the Great Depression based on an analysis of similarities between the economic climate of the late 1880s and that of the late 1920s, for his involvement in the development of the University of Western Australia, and for his numerous works on economics and the defence of free trade.