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FIXED INPUT: An input in the production of goods and services that does not change in the short run. A fixed input should be compared with a variable input, an input that DOES change in the short run. Fixed and variable inputs are most important for the analysis of short-run production by a firm. The best example of a fixed input is the factory, building, equipment, or other capital used in production. The comparable example of a variable input would then be the labor or workers who work in the factory or operate the equipment. In the short run (such as a day or so) a firm can vary the quantity of labor, but the quantity of capital is fixed.

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PERFECT COMPETITION, SHORT-RUN PRODUCTION ANALYSIS

A perfectly competitive firm produces the profit-maximizing quantity of output that equates marginal revenue and marginal cost. This production level can be identified using total revenue and cost, marginal revenue and cost, or profit. Because a perfectly competitive firm faces a perfectly elastic demand curve, it efficiently allocates resources by equating price and marginal cost. In addition, the marginal cost curve above the average variable cost curve is the perfectly competitive firm's short-run supply curve.

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YELLOW CHIPPEROON
[What's This?]

Today, you are likely to spend a great deal of time looking for a downtown retail store wanting to buy either a T-shirt commemorating the second moon landing or a coffee cup commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki. Be on the lookout for poorly written technical manuals.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
"Success is going from failure to failure without a loss of enthusiasm. "

-- Winston Churchill, British statesman

RGDP
Real Gross Domestic Product
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