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September 6, 2026 

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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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STAR TREK SCARCITY

A science-fiction phenomenon that emerged in the second half of the 20th century, which not only entertained millions of fans worldwide for decades, but also can be used to illustrate important economic concepts such as scarcity.

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APLS

GREEN LOGIGUIN
[What's This?]

Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors looking to buy either a printer that works with your stockpile of ink cartridges or income tax software. Be on the lookout for poorly written technical manuals.
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This isn't me! What am I?

Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
"The majority of men meet with failure because of their lack of persistence in creating new plans to take the place of those that fail. "

-- Napoleon Hill, author

RGDP
Real Gross Domestic Product
A PEDestrian's Guide
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