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HERFINDAHL-HIRSHMAN 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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ASSUMPTIONS, PRODUCTION POSSIBILITIES

The four key assumptions underlying production possibilities analysis are: (1) resources are used to produce one or both of only two goods, (2) the quantities of the resources do not change, (3) technology and production techniques do not change, and (4) resources are used in a technically efficient way.

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Today, you are likely to spend a great deal of time watching the shopping channel wanting to buy either a New York Yankees baseball cap or several magazines on home repairs. Be on the lookout for cardboard boxes.
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In the late 1800s and early 1900s, almost 2 million children were employed as factory workers.
"Be willing to have it so. Acceptance of what has happened is the first step to overcoming the consequences of any misfortune."

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