Define the lerner index, the bain index, and the four firm concentration ratio. Choose one and discuss some of he problems in calculating and interpreting it -- does it reflect the degree of monopoly power in an economically meaningful sense? Explain.

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Of course I can make sense of these three ordinarily involved proportions of market focus in financial matters Lerner File The Lerner Record named after financial specialist Abba Lerner is a proportio... View the full answer