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NATURAL SELECTION: The notion that firms best suited to the economic environment on the ones that tend to survive. The natural selection of business firms is an adaptation of the biological process of natural selection, in which biological entities best suited to the natural environment are the ones that survive. The notion of natural section suggests that even if firms do NOT actively, consciously pursue the profit-maximization goal, assuming they do is not necessarily unreasonable. Those firms that approximate the goal of profit-maximization, whether intentionally or accidently, are the ones most likely to survive and remain in business.

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INCREASING MARGINAL RETURNS

In the short-run production by a firm, an increase in the variable input results in an increase in the marginal product of the variable input. Increasing marginal returns typically surface when the first few quantities of a variable input are added to a fixed input. This is one of two alternatives for marginal returns. The other is decreasing marginal returns. A related phenomenon for long-run production is increasing returns to scale.

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BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors trying to buy either a remote controlled sports car with an air spoiler or semi-gloss photo paper that works with your neighbor's printer. Be on the lookout for gnomes hiding in cypress trees.
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