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July 31, 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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AD VALOREM TAX

A tax specified as a percentage of the price or value of a good, service, asset, or other activity. Ad valorem taxes tend to be broad based, imposed on activities such as income and retail sales. In fact, the two most important ad valorem taxes are income taxes and sales taxes. People pay a percentage of their incomes in income taxes or a percentage or the value of their purchases in sales taxes, regardless of the amount of time spent working or the quantities of goods purchases. An alternative is a per unit tax, with is a tax specified as a percentage of the physical quantity of a good.

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APLS

RED AGGRESSERINE
[What's This?]

Today, you are likely to spend a great deal of time wandering around the downtown area wanting to buy either a coffee cup commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki or a rechargeable battery for your cell phone. Be on the lookout for crowded shopping malls.
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This isn't me! What am I?

Ragnar Frisch and Jan Tinbergen were the 1st Nobel Prize winners in Economics in 1969.
"Difficulties mastered are opportunities won. "

-- Winston Churchill, Statesman

HDI
Human Development Index
A PEDestrian's Guide
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