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cept of sectorally unbalanced growth in the mid-1950s.1 Perroux's conceptualization of economic growth postulated that expansion occurred in particular economic sectors or of He theorized that growth poles, through their structural interdependence linkages with other economic activities, were a driving force of economic growth. In the mid-1960s growth poles came to be viewed, in the spatial context of a region, as towns or cities possessing a complex of propulsive growth firms or firms.' The growth firm characteristics of lead firms were assumed to
Rodney A. Erickson (Wed,) studied this question.