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HERFINDAHL INDEX: 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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FOREIGN SECTOR

The aggregate macroeconomic sector that contains everyone and everything beyond the political boundaries of the domestic economy--including households, businesses, and governments in other countries. The primary function of the foreign sector is to undertake external activity that is outside the control of the domestic economy. This is one of the four macroeconomic sectors. The other three are household sector, business sector, and government sector.

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Today, you are likely to spend a great deal of time watching the shopping channel seeking to buy either a genuine down-filled pillow or one of those "hang in there" kitty cat posters. Be on the lookout for the happiest person in the room.
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More money is spent on gardening than on any other hobby.
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