Final answer:
Strategic groups differ across various dimensions like market segments, customer service, research and development, and distribution channels, with the profit motive being a broader aspect. The market structure influences how these dimensions are applied by firms in an industry.
Step-by-step explanation:
Strategic groups within an industry differ among several dimensions, not all of which may necessarily apply. The primary dimensions along which these groups might vary include market segments, customer service, research and development, distribution channels, and potentially the profit motive, although the profit motive can be a broader, less specific dimension for differentiation among firms.
The market structure of the product(s) in question shapes how these dimensions are leveraged by each firm within an industry, as it defines the level of competition and the ability for a firm to distinguish itself among its competitors.