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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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ASSUMPTION An initial condition or statement of a model or theory that sets the stage for an analysis by abstracting from the real world. Assumptions are important to economic analysis. Some assumptions are used to simplify a complex analysis into more easily manageable parts. Other assumptions are used as control conditions that are subsequently changed to evaluate the consequences.
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PINK FADFLY
[What's This?]
Today, you are likely to spend a great deal of time looking for a downtown retail store seeking to buy either a birthday gift for your mother or a weathervane with a horse on top. Be on the lookout for deranged pelicans.
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In the late 1800s and early 1900s, almost 2 million children were employed as factory workers.
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"Few things help an individual more than to place responsibility upon them and to let them know that you trust them." -- Booker T. Washington
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JRE
Journal of Regulatory Economics
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