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TOTAL PRODUCT: The total quantity of output produced by a firm for a given quantity of inputs. Total product is the foundation upon which the analysis of short-run production for a firm is analyzed. The usual framework is to analyze total product when in a variable input (labor) changes, for a given amount of a fixed input (capital). Two related concepts derived from total product are average product and marginal product.

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MARGINAL PROPENSITY TO INVEST

The change in business investment expenditures induced by a change in income or production (national income or gross domestic product). The marginal propensity to invest (abbreviated MPI) is another term for the slope of the investment line and is calculated as the change in investment divided by the change in income or production. The MPI plays a role in Keynesian economics. It augments the slope of the aggregate expenditures line and is part to the multiplier process. A related marginal measure is the marginal propensity to consume.

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Today, you are likely to spend a great deal of time flipping through mail order catalogs wanting to buy either a video camera with stop action features or one of those memory foam pillows. Be on the lookout for the happiest person in the room.
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A scripophilist is one who collects rare stock and bond certificates, usually from extinct companies.
"I not only use all the brains that I have, but all that I can borrow. "

-- Woodrow Wilson, 28th US president

IRR
Internal Rate of Return
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