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LAW: Generally accepted, verified, fundamental principle of nature. Laws have been tested and verified through the scientific method. As a house is constructed from concrete, lumber, and nails, a theory is constructed from laws. To be a fundamental law of nature, a principle must capture a cause-and-effect relationship about the workings of the world.

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THREE-SECTOR AGGREGATE EXPENDITURES LINE

A graphical depiction of the relation between aggregate expenditures by the three domestic macroeconomic sectors (household, business, and government) and the level of aggregate income or production. The three-sector aggregate expenditures line combines consumption expenditures, investment expenditures, and government purchases. The slope of this aggregate expenditures line is based on the marginal propensity to consume, adjusted for marginal propensities of the other expenditures that are assumed to be induced when constructing the line. This is one of three aggregate expenditures lines based on the number of sectors included. The others are the two-sector aggregate expenditures line and the four-sector aggregate expenditures line.

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Today, you are likely to spend a great deal of time strolling through a department store wanting to buy either a T-shirt commemorating the first day of winter or software that won't crash your computer. Be on the lookout for slow moving vehicles with darkened windows.
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A thousand years before metal coins were developed, clay tablet "checks" were used as money by the Babylonians.
"The secret of getting ahead is getting started. The secret of getting started is breaking your complex, overwhelming tasks into small manageable tasks, and then starting on the first one. "

-- Mark Twain, writer

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