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DEFAULT RISK: The probability that a borrowing agent will not pay in full the agreed interest and/or principal. A default risk can be assigned to any bond or loan agreement. Of course, there are some instruments considered default-risk-free, that is, instruments for which the probability that a borrowing agent will not pay is zero. The most noted examples are the U.S. Treasury securities, which have virtually no default risk because the U.S. government guarantees that all the principal and interest will be repaid. When calculating the risk premium on financial instruments, investors use default-risk-free instruments for comparison.

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MARGINAL REVENUE, PERFECT COMPETITION

The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a perfectly competitive firm receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a perfectly competitive firm equates marginal revenue and marginal cost.

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Today, you are likely to spend a great deal of time lost in your local discount super center trying to buy either a how-to book on fine dining or a coffee cup commemorating the first day of winter. Be on the lookout for malfunctioning pocket calculators.
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Okun's Law posits that the unemployment rate increases by 1% for every 2% gap between real GDP and full-employment real GDP.
"The work of the individual still remains the spark that moves mankind forward. "

-- Igor Sikorsky, aeronautical engineer

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