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HHI: The common abbreviation for the Herfindahl-Hirshman index (or the Herfindahl index), which is a measure of concentration of the production in an industry that's calculated as the sum of the squares of market shares for each firm. This is an alternative method of summarizing the degree to which an industry is oligopolistic and the relative concentration of market power held by the largest firms in the industry. The Herfindahl index gives a better indication of the relative market control of the largest firms than can be found with the four-firm and eight-firm concentration ratios.

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INVESTMENT, PRODUCTION POSSIBILITIES

Investment typically refers to the purchase of productive capital by business in anticipation of increasing production and (presumably) generating more profit. More generally, investment can be considered as sacrificing the current satisfaction of wants and needs (consumption goods) to expand productive capability (capital goods). Production possibilities analysis can be used to illustrate the tradeoff between consumption and capital as a movement along a production possibilities curve.

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APLS

ORANGE REBELOON
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Today, you are likely to spend a great deal of time searching the newspaper want ads looking to buy either a travel case for you toothbrush or a looseleaf notebook binder. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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The 22.6% decline in stock prices on October 19, 1987 was larger than the infamous 12.8% decline on October 29, 1929.
"The roots of education are bitter, but the fruit is sweet."

-- Aristotle, philosopher

BPEA
Brookings Papers on Economic Activity
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