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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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CIRCULAR FLOW

A model of the continuous movement of production, income, and the services of scarce resources that flow between producers and consumers. In particular, the circular flow is a model of the continuous production and consumption interaction among the four major sectors of the macroeconomy--household, business, government, and foreign--using the three macroeconomic markets--product, resource, and financial. The circular flow model provides a easy way of getting the "big picture" and of seeing how the key parts of the macroeconomy fit together.

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GREEN LOGIGUIN
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Today, you are likely to spend a great deal of time wandering around the downtown area looking to buy either a how-to book on home remodeling or a tall storage cabinet with five shelves and a secure lock. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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One of the largest markets for gold in the United States is the manufacturing of class rings.
"As the births of living creatures at first are ill-shapen, so are all innovations, which are the births of time. "

-- Sir Francis Bacon, philosopher

PDI
Personal Disposable Income
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