1. 2. This paper is a review of some of the results presented in the author's M.A. thesis: "Changes in the Employment Structure of Canadian Towns, Cities, Regions and Provinces between 1951 and 1961 (Department of Geography, McGill University, Montreal, 1965).
2. 3. "Groups" are defined as the Census Standard Industrial Classification (sic) categories at the two-digit level to which a "Miscellaneous" group has been added to include insignificant groups. The employment data were obtained from the following publications of the Dominion Bureau of Statistics: Labour Force, Tables 17 and 21, Census of Canada, 4 (1951 ); Labour Force, Census of Canada, 3, Catalogues 94-518, 94-519, 94-520, and 94-521 (1961); see also Standard Industrial Classification Manual, Census of Canada, Catalogue 12-501 (1961). It should be noted that the data are collected by place of residence and not by place of work.
3. 4. C Clark, The Conditions of Economic Progress (London, 1940 ).
4. Capital and the Growth of Knowledge