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Alice's utility function over toys (T) and games (G) can be expressed as U(T,G) = 2TG. Use calculus to determine whether Alice's indifference curves are convex.
Herfindahl Index
A measure of the concentration and competitiveness of an industry, calculated by summing the squares of the market shares of each firm within the industry.
Four-Firm Concentration Ratio
a measure of market concentration and competition among the four largest firms in an industry, expressed as a percentage of total market sales.
Oligopolistic Industry
An industry characterized by a small number of firms that have significant control over market prices and where strategic interactions among these firms determine market dynamics.
Herfindahl Index
The Herfindahl Index is a measure of market concentration used to evaluate the level of competition within an industry, calculated as the sum of the squares of each firm's market share.
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