In the long run,

a. monopolies never earn economic profit
b. economic profits and losses determine entry and exit into monopoly markets
c. monopolies may earn economic profit
d. competition always destroys monopoly
e. government always regulates monopoly

C

Economics

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What will be an ideal response?

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A tax system that applies a lower marginal tax rate at higher levels of income is

A) progressive. B) regressive. C) proportional. D) flat.

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