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GOOD TYPES: We can identify four different types of goods based on two key characteristics -- rival consumption and excludability. Private that are rival in consumption and easily subject to the exclusion of nonpayers. Public goods that are nonrival in consumption and the exclusion of nonpayers is virtually impossible. Near-public goods that are nonrival in consumption and easily subject to the exclusion. Common-property goods that are rival in consumption and not easily subject to the exclusion.

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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 flipping through the yellow pages looking to buy either a flower arrangement for your aunt or a birthday greeting card for your uncle. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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The first paper currency used in North America was pasteboard playing cards "temporarily" authorized as money by the colonial governor of French Canada, awaiting "real money" from France.
"The time to repair the roof is when the sun is shining."

-- John F. Kennedy, 35th U. S. president

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