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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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INVISIBLE HAND

The notion that buyers and sellers, consumers and producers, households and businesses, by pursuing their own self-interests do what is best for the economy automatically without any government intervention, as if guided by an invisible hand.

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Today, you are likely to spend a great deal of time at a flea market hoping to buy either an ink cartridge for your printer or a rechargeable battery for your camera. Be on the lookout for the happiest person in the room.
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The average bank teller loses about $250 every year.
"Experience keeps a dear school, but fools will learn in no other. "

-- Benjamin Franklin

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International Bank for Settlements
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