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October 8, 2026 

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MARGINAL PRODUCT: The change in the quantity of total product resulting from a unit change in a variable input, keeping all other inputs unchanged. Marginal product, usually abbreviated MP, is found by dividing the change in total product by the change in the variable input. Marginal product lies at the very foundation of the analysis of short-run production and the subsequent explanation of the law of supply and the upward-sloping supply curve, using the law of diminishing marginal returns.

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MONOPOLISTIC COMPETITION, LONG-RUN ADJUSTMENT

A monopolistically competitive industry undertakes a two-part adjustment to equilibrium in the long run. One is the adjustment of each monopolistically competitive firm to the appropriate factory size that maximizes long-run profit. The other is the entry of firms into the industry or exit of firms out of the industry, to eliminate economic profit or economic loss. The end result of this long-run adjustment is two equilibrium conditions--one for profit maximization, the other for zero economic profit.

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An Altogether Look at UNIONS

Hey, look! Is that who I think it is? Yes of course, that's Dan Dreiling the drywall guy. You might recall that Dan repaired a hole in my living room wall back in Fact 7. He's coming out of the Mona Mallard Duct Tape Industries plant with all of the duct tape factory workers. And he seems most distressed. Let's get to the bottom of this. Here's his story. The drywall business sort of dried up, and Dan has taken up employment in the exciting field of duct tape fabrication. The duct tape workers, though, are talking union. Dan's indecisive about this move toward unionization. Perhaps we can help him out. Let's stroll around the often controversial topic of labor unions.
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RED AGGRESSERINE
[What's This?]

Today, you are likely to spend a great deal of time at an auction hoping to buy either a T-shirt commemorating the 2000 Presidential election or a really, really exciting, action-filled video game. Be on the lookout for letters from the Internal Revenue Service.
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This isn't me! What am I?

In his older years, Andrew Carnegie seldom carried money because he was offended by its sight and touch.
"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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