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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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NET FOREIGN FACTOR INCOME

The difference between factor payments received from the foreign sector by domestic citizens and factor payments made to foreign citizens for domestic production. Net foreign factor income (NFFI) is the key difference between gross DOMESTIC product and gross NATIONAL product in the National Income and Product Accounts maintained by the Bureau of Economic Analysis. It is also an important difference between NATIONAL income and gross (and net) DOMESTIC product.

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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors looking to buy either a T-shirt commemorating the second moon landing or a coffee cup commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki. Be on the lookout for fairy dust that tastes like salt.
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The penny is the only coin minted by the U.S. government in which the "face" on the head looks to the right. All others face left.
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IRR
Internal Rate of Return
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