John Kenneth Galbraith, also known as Ken Galbraith, was a Canadian-American economist, diplomat, public official, and intellectual. His books on economic topics were bestsellers from the 1950s through the 2000s. As an economist, he leaned toward post-Keynesian economics from an institutionalist perspective. He served as the deputy director of the powerful Office of Price Administration (OPA) during World War II in charge of stabilizing all prices, wages and rents in the American economy, to combat the threat of inflation and hoarding during a time of shortages and rationing, a task which was successfully accomplished.