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BACKSTOP RESOURCE: A sustainable, renewable natural resource that is used in place of, and as a substitute for, finite, exhaustible natural resources that have been exhausted. A sustainable resource is one in which the amount used today cannot reduce the amount available tomorrow.The best example is solar energy. No matter how much solar energy we use today, the same amount reaches the planet every day in the future. A backstop resource is then a sustainable resource, like solar energy, that society uses after finite resources, like fossil fuels, have been exhausted. In fact, solar energy is often considered THE backstop energy resource. It represents THE "safety net" that's available when fossil fuels are depleted.

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AVERAGE FIXED COST

Total fixed cost per unit of output, found by dividing total fixed cost by the quantity of output. When compared with price (per unit revenue), average fixed cost (AFC) indicates whether or not a profit-maximizing firm should shutdown production in the short run. Average fixed cost is one of three average cost concepts important to short-run production analysis. The other two are average total cost and average variable cost. A related concept is marginal cost.

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Today, you are likely to spend a great deal of time wandering around the shopping mall trying to buy either a coffee cup commemorating the 1960 Presidential election or a how-to book on fixing your computer, with illustrations. Be on the lookout for poorly written technical manuals.
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The 22.6% decline in stock prices on October 19, 1987 was larger than the infamous 12.8% decline on October 29, 1929.
"It has been my philosophy of life that difficulties vanish when faced boldly. "

-- Isaac Asimov

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