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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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VOTING PROBLEMS Voting is a key source of government inefficiency because it can fail to provided leaders with a valid indication of society's preferences. Part of the inefficiency rests with utility-maximizing decisions of the voters, who choose rational ignorance (not to be informed) and rational abstention (not to participate), both of which lead to voter apathy and influential special interest groups. Part of the inefficiency rests with the voting process, which results in importance of the median voter, inconsistency of the voting paradox, and logrolling (vote-trading ) among voters.
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A thousand years before metal coins were developed, clay tablet "checks" were used as money by the Babylonians.
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"Ships are safe in harbor. But that is not what ships are for." -- Anonymous
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ICC
International Chamber of Commerce
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