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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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TWO-SECTOR, THREE-MARKET CIRCULAR FLOW

A circular flow model of the macroeconomy containing two sectors (business and household) and three markets (product, factor, and financial) that illustrates the continuous movement of the payments for goods and services between producers and consumers, with particular emphasis on saving, investment, and the role of financial markets. Other circular models are two-sector, two-market circular flow; three-sector, three-market circular flow; and four-sector, three-market circular flow.

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BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club hoping to buy either a pair of red goulashes with shiny buckles or a handcrafted bird feeder. Be on the lookout for poorly written technical manuals.
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The wealthy industrialist, Andrew Carnegie, was once removed from a London tram because he lacked the money needed for the fare.
"There's only one corner of the universe you can be certain of improving and that's your own self. "

-- Aldous Huxley, writer

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International Labor Office
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