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January 26, 2026 

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TOTAL COST AND MARGINAL COST: A mathematical connection between marginal cost and total cost stating that marginal cost IS the slope of the total cost curve. If the total cost curve has a positive slope (that is, is upward sloping), then marginal cost is positive. Moreover, if the total cost curve has a positive and increasingly steeper slope, then the marginal cost is positive and rising. If the total cost curve has a positive and decreasingly steeper slope, then the marginal cost is positive but falling.

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VERY SHORT RUN, MICROECONOMICS

A production period of time in which at all inputs in the production process are fixed, meaning the quantity of output itself is fixed. Also termed market period, the very short run exists if the period is so short that no additional production is possible. In other words, the good has been produced, all that remains is to sell it. This is one of four production time periods used in the study of microeconomics. The other three are short run, long run, and very long run.

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"It has been my philosophy of life that difficulties vanish when faced boldly. "

-- Isaac Asimov

Fact 4: Our Monopolized Markets

Our pedestrian's jaunt through the economy is not, unfortunately, an unrestrained shopping spree for confectioneries, spark plug tools, and Houston, Texas. We have other important errands to run. At the moment we need to hike over to Shady Valley's exclusive provider of cable television services, the Merciless Monolithic Media Masters Cable Television Company, Inc., to inquire about a mysterious fee that appeared last month's bill.

The good news is that the Merciless Monolithic Media Masters (the 4M people) Cable office is a mere 2 miles (3 kilometers for the metrically inclined) from the Shady Valley Central Town Sprawling Hills Shopping Mall. A hop, skip, and a moderately long jump later, our excursion through the economy takes us to the front door of the 4M Cable Television Company where I hope to discover why last month's cable bill included a $3,569 charge for something called "The Vacation Channel." I didn't even know I had a vacation channel. (But, I'm sure it's a great channel, and if I don't have it, then I will certainly subscribe. Please don't disconnect me.)

Of course, because this an afternoon workday, the doors of the 4M office are locked. I can almost make out, through the expensive stained glass windows, what appears to be several Merciless Monolithic Media Masters Cable Television employees, with champaign bottles in hand, dancing on expensive mahogany desks. Let's not disturb them. As they say in the cable business, an upset worker is a disconnected customer.
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Today, you are likely to spend a great deal of time touring the new suburban shopping complex trying to buy either a half-dozen helium filled balloons or a packet of address labels large enough for addresses of both the sender and the recipient. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
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