About J.H. Dales J.H. Dales is a professor emeritus in the Department of Economics. From 1957 to 1966 Professor Dales was Managing Editor of the Canadian Journal of Economics and Political Science. Books by J.H. Dales The Protective Tariff in Canada's Development Eight Essays on Trade and Tariff When Factors Move with Special Reference to Canadian Protectionism, 1870-1955 by (author) J.H. Dales