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SEVENTH RULE OF COMPLEXITY: The seventh of seven basic rules of the economy. It is the observation that the world is complex, that every action has direct and often intended consequences and indirect and probably unintended effects (that is, cause and effect). A few of the more noted illustrations of this seventh rule are the circular flow (especially the expenditure multiplier) and market failures (especially externalities).

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INJECTIONS-LEAKAGES MODEL

A macroeconomic model that balances non-consumption expenditures on production (injections) and non-consumption uses of income (leakages) that is used to identify the equilibrium level of, and analyze disruptions to, aggregate production and income. The injections-leakages model is based on the principles of Keynesian economics and provides an alternative to the standard aggregate expenditures (Keynesian cross) analysis. The three injections included in the model are investment expenditures, government purchases, and exports. The three leakages included in the model are saving, taxes, and imports. Three variations are the two-sector injections-leakages model (or saving-investment model), three-sector injections-leakages model, and four-sector injections-leakages model.

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BLUE PLACIDOLA
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Today, you are likely to spend a great deal of time at an auction seeking to buy either several magazines on fashion design or a package of 3 by 5 index cards, the ones without lines. Be on the lookout for letters from the Internal Revenue Service.
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In the early 1900s around 300 automobile companies operated in the United States.
"In order to create there must be a dynamic force, and what force is more potent than love."

-- Igor Stravinsky, violinist

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International Development Association
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