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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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GOVERNMENT CONSUMPTION EXPENDITURES AND GROSS INVESTMENT

The official item in the National Income and Product Accounts maintained by the Bureau of Economics Analysis measuring government purchases undertaken by the government sector. Government consumption expenditures and gross investment averages between 15-20 percent of gross domestic product. As might be expected, this percentage tends to be ebb and flow with the political winds. Some political leaders prefer more government activity, others less. However, this percentage is even more dependent on military conflicts and wars that require massive government activity. The other official expenditures included in the National Income and Product Accounts are personal consumption expenditures, gross private domestic investment, and net exports of goods and services.

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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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In the early 1900s around 300 automobile companies operated in the United States.
"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. "

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