Evaluate the integral if it is convergent. 
Definitions:
Four-Firm Sales Concentration Ratio
A measure indicating the total market share of the four largest firms within an industry, used to assess the level of market competition.
Geographic Concentration
The phenomenon where certain industries or businesses are clustered in specific regions, often due to advantages like resources or skilled labor.
X-Inefficiency
X-Inefficiency occurs when a firm fails to use its resources efficiently due to a lack of competitive pressure.
Differentiated Oligopoly
A market structure in which a few firms dominate the market by selling products that are distinct yet somewhat substitutable, focusing on product differentiation to maintain competitive advantage.
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