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October 9, 2026 

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LERNER INDEX: The difference between price (p) and marginal cost (mc) as a fraction of price, that is [p-mc]/p. The Lerner index is usually taken as an indicator of market power because the larger the index, the larger the difference between price and marginal cost, that is, the larger the distance between the price and the competitive price. The Lerner index depends on the elasticity of demand. The Lerner index is also called the price-cost margin.

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BLUE PLACIDOLA
Your compete MICRO*scope for today

You are the type of person who considers the hectic pace of a crowded holiday shopping mall about the same as a stroll in the park. Family and friends use you either as a paperweight or boundary marker. Today, you are likely to spend a great deal of time surfing the Internet trying to buy either a package of 4 by 6 index cards, the ones with lines or a 50 foot extension cord. Be on the lookout for mail order catalogs with hidden messages. You should consider shopping at stores or businesses beginning with the letter K, but do not buy any products with a serial number or product code containing the number 947463. Your preferred shopping venue is department stores. Your special symbol is the at sign (@).


Is this You?

As a Blue Placidola, you are easy-going and even-tempered, calm and composed. For you, the hectic pace of a crowded shopping mall during the holiday rush is nothing, it's little more than a tranquil stroll in the park. Life is good. Life goes on. Why worry. You are a happy shopper and you seldom fret over trivial details of a market exchange, in part because you are astute enough to get moderately low prices and relatively good deals.


This isn't me! What am I?
M2

The medium-range monetary aggregate for the U.S. economy containing the combination of M1 (currency and checkable deposits) and short-term, small denomination near monies. M2 contains financial assets that either function directly as money for the U.S. economy or can be easily and quickly converted into money. The near monies added to M1 to derive M2 include savings deposits, certificates of deposit, money market deposits, and money market mutual funds. M2 is one of three monetary aggregates tracked and reported by the Federal Reserve System. The other two are designated M1 and M3.

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A Tycoon Of The MUTUAL FUNDS

Winston Smythe Kennsington III -- our second-estate financial maestro -- has given me a hot, and I mean REALLY HOT, investment tip. Waldo Industries, the parent company of Waldo's TexMex Taco World, is making plans to expand its franchises. Marketing studies show that people are ripe and ready for Waldo's Super Deluxe TexMex Gargantuan Tacos beyond the confines of Shady Valley. For a minimal investment, I can grab a share of this money-making opportunity. A minimal investment to our Ivy-League friend Winnie is $500,000. Unfortunately my bank account, including recent deposits of loose change found on our pedestrian trek, is a few zeros short. Is this another sure-fire financial opportunity that will pass me by?
Tell me more...

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APLS

Post WWI induced hyperinflation in German in the early 1900s raised prices by 726 million times from 1918 to 1923.
"There's only one corner of the universe you can be certain of improving and that's your own self. "

-- Aldous Huxley, writer

JEH
Journal of Economic History
A PEDestrian's Guide
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