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HHI: The common abbreviation for the Herfindahl-Hirshman index (or the Herfindahl index), which is 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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CETERIS PARIBUS

A Latin term meaning that other factors remain unchanged. Ceteris paribus is commonly used as an assumption when conducting a wide variety of economic analyses. By holding everything else constant, the ceteris paribus assumption makes it possible to identify the cause-and-effect relation between two factors. Relaxing the ceteris paribus assumption is the primary analytical technique used in the comparative statics study of economics.

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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors seeking to buy either a birthday greeting card for your grandmother or a coffee cup commemorating yesterday. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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The average length of a "business lunch" is about 36 minutes.
"You have to find something that you love enough to be able to take risks, jump over the hurdles and break through the brick walls that are always going to be placed in front of you. If you don't have that kind of feeling for what it is you're doing, you'll stop at the first giant hurdle. "

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