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MARGINAL EFFICIENCY OF INVESTMENT: The anticipated rate of return on a capital investment project undertaken by a business firm. Businesses typically compare the marginal efficiency of investment, abbreviated MEI, on physical capital with interest rate returns on financial capital when deciding to undertake an investment project. Because different investment projects have different returns, businesses often have a range of alternatives projects from which to choose. Combining all projects throughout the economy gives rise to an investment demand curve relating investment expenditures to the interest rate.

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PERFECT COMPETITION, LONG-RUN EQUILIBRIUM CONDITIONS

The long-run equilibrium of a perfectly competitive industry generates six specific equilibrium conditions, including: (1) economic efficiency (P = MC), (2) profit maximization (MR = MC), (3) perfect competition (MR = AR = P), (4) breakeven output (P = AR = ATC), (5) minimum production cost (MC = ATC), and (6) minimum efficient scale (MC = ATC = LRAC = LRMC).

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APLS

ORANGE REBELOON
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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors wanting to buy either a New York Yankees baseball cap or several magazines on home repairs. Be on the lookout for small children selling products door-to-door.
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One of the largest markets for gold in the United States is the manufacturing of class rings.
"Whenever you see a successful business, someone once made a courageous decision."

-- Peter F. Drucker, business strategist

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American Assocation of Commodity Traders
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