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COEFFICIENT OF ELASTICITY: A numerical measure of the relative response of one variable (A) to changes in another variable (B). The most common applications for the coefficient of elasticity are price elasticity of demand and price elasticity of supply. Two other notable applications are income elasticity of demand and cross elasticity of demand.

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GOOD TYPES

The economy produces four distinct types of goods based on two key characteristics -- consumption rivalry and nonpayer excludability. Consumption rivalry arises if consumption of a good by one person prevents another from also consuming. Nonpayer excludability means potential consumers who do not pay for a good can be excluded from consuming. Private goods are rival in consumption and easily subject to the exclusion of nonpayers. Public goods are nonrival in consumption and the exclusion of nonpayers is virtually impossible. Near-public goods are nonrival in consumption and easily subject to exclusion. Common-property goods are rival in consumption and not easily subject to exclusion. Private goods can be efficiently exchanged through markets. Public, near-public and common-property goods cannot, but require some degree of government involvement for efficiency.

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Today, you are likely to spend a great deal of time watching the shopping channel hoping to buy either a small palm tree that will fit on your coffee table or several magazines on fashion design. Be on the lookout for small children selling products door-to-door.
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The average length of a "business lunch" is about 36 minutes.
"The shifts of fortune test the reliability of friends. "

-- Marcus Tullius Cicero, Roman statesman

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