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S&P 500: The abbreviation for the Standard & Poor's 500, an index of the prices of 500 corporate stocks traded on the New York Stock Exchange. It includes an assortment of stocks for industrial, transportation, and utility companies. It also includes a larger number of stocks than the comparable Dow Jones composite index, which means it's often considered a better measure of the overall performance of the stock market. Less commonly publicized are separate Standard & Poor's indexes for industrial, transportation, utility, and financial stocks.

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INCREASING RETURNS TO SCALE

A given proportional change in all resources in the long run results in a proportional greater change in production. Increasing returns to scale exists if a firm increases ALL resources--labor, capital, and other inputs--by a given proportion (say 10 percent) and output increases by more than this proportion (that is more than 10 percent). This is one of three returns to scale. The other two are decreasing returns to scale and constant returns to scale.

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Today, you are likely to spend a great deal of time at a dollar discount store wanting to buy either a rechargeable battery for your camera or a coffee cup commemorating the first day of spring. Be on the lookout for small children selling products door-to-door.
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Three-forths of the gold mined each year is used to manufacture jewelry.
"How wonderful it is that nobody need wait a single moment before starting to improve the world."

-- Anne Frank

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Regression Analysis of Time Series (software)
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