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MARGINAL PROPENSITY TO INVEST: The proportion of each additional dollar of national income that is used for investment expenditures. Or alternatively, this is the change in investment expenditures due to a change in national income. Abbreviated MPI, the marginal propensity to invest is the slope of the investment line used in the analysis of Keynesian economics. As such, it also plays a role in the slope of the aggregate expenditure line and the multiplier effect.

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INNOVATION PROFIT

Economic profit, the difference between the total revenue received by a firm and the total opportunity cost of production, that is attributable to innovation, the initial application of new products, technologies, or ideas. Innovation profit is one of two sources of economic profit. The other is monopoly profit that arises due to market control. The generation of innovation profit is an important incentive that by rewarding individual innovative behavior enables society-wide benefits from the resulting innovations.

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Today, you are likely to spend a great deal of time strolling through a department store looking to buy either a rim for your spare tire or decorative celebrity figurines. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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Helping spur the U.S. industrial revolution, Thomas Edison patented nearly 1300 inventions, 300 of which came out of his Menlo Park "invention factory" during a four-year period.
"It is the mark of an educated mind to be able to entertain a thought without accepting it."

-- Aristotle

RONA
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