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October 8, 2026 

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EFFECTIVE DEMAND: The notion that the actual demand for aggregate output in the macroeconomy is based on the actual income or other existing economic conditions and not on income and conditions existing in equilibrium. The idea of effective demand plays a key role in Keynesian economics and how the macroeconomy can have extended periods of unemployment. Effective demand is in direct contrast to the view underlying classical economics that demand is that existing in equilibrium.

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HERFINDAHL INDEX

A measure of concentration of the production in an industry calculated as the sum of the squares of market shares for each firm. This is one method of summarizing the degree to which an industry is oligopolistic and the concentration of market control held by the largest firms in the industry. Two other measures of industry concentration are the four-firm concentration ratio and the eight-firm concentration ratio.

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The Wide, Wide World Of FOREIGN TRADE

Two blocks directly south of the Mega-Mart Discount Emporium we'll find that Natural Ned's Nursery and Garden Center is having a grand opening celebration. I'd like to saunter over to check out their sundials -- a valuable, and long sought after acquisition for my backyard garden. In fact, Natural Ned's Nursery and Garden Center has a new shipment of sundials imported from the sundial capital of the world -- the Republic of Northwest Queoldiola. If I'm going to get a sundial, I should get the best, right? Northwest Queoldiola produces the finest, least expensive, and most technologically advanced sundials in the world. However, Mega-Mart Discount Warehouse Super Center has an ample supply of good old American-made sundials. They're a little more expensive and not quite as good, but they're made in the U. S. of A. by good old Americans. What a dilemma!
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Today, you are likely to spend a great deal of time wandering around the downtown area trying to buy either a how-to book on home repairs or a large, stuffed kitty cat. Be on the lookout for strangers with large satchels of used undergarments.
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The earliest known use of paper currency was about 1270 in China during the rule of Kubla Khan.
"Do not stop thinking of life as an adventure. You have no security unless you can live bravely, excitingly, imaginatively, unless you can choose a challenge instead of a competence. "

-- Eleanor Roosevelt, first lady

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