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March 1, 2026 

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ACCOUNTING COST: The actual outlays or expenses incurred in production that shows up a firm's accounting statements or records. Accounting costs, while very important to accountants, company CEOs, shareholders, and the Internal Revenue Service, is only minimally important to economists. The reason is that economists are primarily interested in economic cost (also called opportunity cost). That fact is that accounting costs and economic costs aren't always the same. An opportunity or economic cost is the value of foregone production. Some economic costs, actually a lot of economic opportunity costs, never show up as accounting costs. Moreover, some accounting costs, while legal, bonified payments by a firm, are not associated with any sort of opportunity cost.

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ARC ELASTICITY

The average elasticity for discrete changes in two variables. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of initial and ending values of each variable, rather than initial values. Arc elasticity is generally calculated using the midpoint elasticity formula. The contrast to arc elasticity is point elasticity. For infinitesimally small changes in two variables, arc elasticity is the same as point elasticity.

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Fact 6: Our Unknown Economy

Dr. Nova Cain, DDS, has her office in the mini-mall just north of city hall. You know the sort of mini-mall. It has a branch of Interstate OmniBank, Smilin' Ted's All-Comers Insurance Agency, an auto parts store, a branch of the public library, and four chiropractors.

Dr. Cain's location near the Shady Valley City Hall is most fortunate. One of my back molars is beginning to shoot sharp pains through my eyeball, into my brain, and out the back of my head. I've been meaning to stop by for a cleaning and check up, but, well, the thought of sharp needles and high-speed drills grinding away large portions of my teeth convinced me that other activities were more important.

Now, however, just as we're trying to trek through the complexities of the economy, that back molar has decided to throb incessantly. It's best if I stop in and let the kind and (hopefully) gentle Dr. Cain check it out.

Guess what? ROOT CANAL!
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Today, you are likely to spend a great deal of time watching the shopping channel wanting to buy either a pair of red and purple designer socks or a T-shirt commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki. Be on the lookout for poorly written technical manuals.
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Okun's Law posits that the unemployment rate increases by 1% for every 2% gap between real GDP and full-employment real GDP.
"Gravitation can not be held responsible for people falling in love."

-- Albert Einstein

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