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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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PRINCIPLE OF MINIMUM DIFFERENCES

A principle stating that monopolistically competitive firms seek to maintain similarities between products at the same time they promote differences. Similarities enable substitutability, such that one firm can attract the buyers away from other firms. Differences enable uniqueness and market control, such that each firm has market control and is able to charge a higher price than achieved with perfect competition. This principle is also termed Hotelling's paradox.

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Today, you are likely to spend a great deal of time at an auction hoping to buy either a birthday greeting card for your grandmother or a coffee cup commemorating yesterday. Be on the lookout for malfunctioning pocket calculators.
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The earliest known use of paper currency was about 1270 in China during the rule of Kubla Khan.
"We must be willing to let go of the life we have planned, so as to have the life that is waiting for us. "

-- E. M. Forster, writer

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