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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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RATIONAL IGNORANCE

The decision NOT to become informed about a topic (such as what a political candidate wants to do) because the cost of acquiring the information is more than the expected benefit. The rational decision to remain ignorant about a subject is a straightforward application of utility maximization and along with the related notion of rational abstention, is a source of voter apathy and government inefficiency.

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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers seeking 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 jovial bank tellers.
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On a typical day, the United States Mint produces over $1 million worth of dimes.
"The victory of success is half won when one gains the habit of setting goals and achieving them. Even the most tedious chore will become endurable as you parade through each day convinced that every task, no matter how menial or boring, brings you closer to fulfilling your dreams."

-- Og Mandino, Author and Speaker

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