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DECREASING-COST INDUSTRY: A perfectly competitive industry with a negatively-sloped long-run industry supply curve that results because expansion of the industry causes lower production cost and resource prices. For a decreasing-cost industry the entry of new firms, prompted by an increase in demand, causes the long-run average supply curve of each firm to shift downward, which decreases the minimum efficient scale of production.

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SLOPE, INVESTMENT LINE

The positive slope of the investment line is also termed the marginal propensity to invest (MPI). This slope is greater than zero but less than one, reflecting induced investment. The slope of the investment line affects the slope of the aggregate expenditures line and thus also affects the magnitude of the multiplier process.

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Today, you are likely to spend a great deal of time browsing about a thrift store seeking to buy either a remote controlled World War I bi-plane or a wall poster commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki. Be on the lookout for neighborhood pets, especially belligerent parrots.
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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!
"And while the law of competition may be sometimes hard for the individual, it is best for the race, because it ensures the survival of the fittest in every department. "

-- Andrew Carnegie, entrepreneur

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