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KONDRATIEFF CYCLE: A cycle of economic activity lasting between 45 and 60 years that acquired the name of the first economist to study it, the Russian economist N. D. Kondratieff. The Kondratieff cycle is somewhat controversial and has been attributed to a number of different causes, including investment in transportation infrastructure. This is one of four separate cycles of macroeconomic activity that have been documented or hypothesized. The other three are Kitchin cycle, Juglar cycle, and Kuznets cycle.

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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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Today, you are likely to spend a great deal of time lost in your local discount super center wanting to buy either handcrafted decorations to hang on your walls or throw pillows for your bed. Be on the lookout for cardboard boxes.
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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.
"Anything's possible. You can be told you have a 90% chance or a 50% chance or a 1% chance, but you have to believe, and you have to fight. "

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