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July 30, 2026 

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CLOSED ECONOMY: An economy with little or no foreign trade. A country with a closed economy can usually tend to it's problems without worrying about other countries. During the 1950s and 1960s, the good old U. S. of A. had relatively little foreign trade, and was very nearly a closed economy. But that was a unique period in the United States unmatched before or since. In fact, it's very difficult to find a real-life closed economy anywhere in the world today. Because of this, you should take a close look at the entry open economy.

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MARGINAL COST AND LAW OF DIMINISHING MARGINAL RETURNS

Decreasing then increasing marginal cost, reflected by a U-shaped marginal cost curve, is the result of increasing then decreasing marginal returns. In particular the decreasing marginal returns is caused by the law of diminishing marginal returns. As such, the law of diminishing marginal returns affects not only the short-run production of a firm but also the cost of short-run production. This translates into a positively-sloped supply curve for profit-maximizing competitive firms.

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BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time looking for a downtown retail store seeking to buy either a T-shirt commemorating the first day of spring or a coffee cup commemorating last Friday (you know why). Be on the lookout for small children selling products door-to-door.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
"In every man's life there lies latent energy. There is, however, a spark that, if kindled, will set the whole being afire, and he will become a human dynamo, capable of accomplishing almost anything to which he aspires. "

-- James Cash Penney, retailer

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