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July 8, 2025 

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TOTAL PRODUCT AND MARGINAL PRODUCT: A mathematical connection between marginal product and total product stating that marginal product IS the slope of the total product curve. If the total product curve has a positive slope (that is, is upward sloping), then marginal product is positive. If the total product curve has a negative slope (downward sloping), then marginal product is negative. If the total product curve has a zero slope (horizontal), then marginal product is zero. Moreover, if the total product curve has a positive and increasingly steeper slope, then the marginal product is positive and rising. If the total product curve has a positive and decreasingly steeper slope, then the marginal product is positive but falling.

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INTEREST RATE: The price of funds expressed as a percentage of the total amount loaned or borrowed. This is the cost of borrowing funds and the payment received for lending. Interest rates are invariably expressed as an annual percentage of the amount borrowed/loaned. A 10 percent interest rate, to run through an easy example, tells us that the cost of borrowing $1,000 for one year is $100.

     See also | real interest rate | opportunity cost | risk premium | inflation premium | investment | capital | dividend | financial markets | yield | prime rate | federal funds rate | interest-rate effect | government borrowing | investment borrowing |


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INTEREST RATE, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2025. [Accessed: July 8, 2025].


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SIGNALLING

When confronted by asymmetric information, the use of small bits of information, or indicators, that suggest more comprehensive information. Signalling is used by those with more information to reduce the cost of informing those with less information. It is commonly used in markets with adverse selection. Methods of signalling include advertising, brand names, and warranties. A related method is screening.

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Today, you are likely to spend a great deal of time at a garage sale trying to buy either a how-to book on home decorating or a set of luggage with wheels. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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Two and a half gallons of oil are needed to produce one automobile tire.
"Progress always involves risk. You can't steal second base and keep your foot on first. "

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MA(N)
A nth-order Moving Average Process
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