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October 1, 2026 

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WELFARE ECONOMICS: A branch of economics that studies efficiency and the overall well-being of society based on alternative allocations of scarce resources. Welfare economics extends the microeconomic analysis of indifference curves to society as a whole. It is concerned with broad efficiency questions and criteria (Pareto efficiency and Kaldor-Hicks efficiency) as well as more specific efficiency issues (market failures, externalities, public goods).

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ELASTICITY ALTERNATIVES, DEMAND

Five categories of the price elasticity of demand that reflect the entire range of the relative responsiveness of a change in quantity demanded to a change in price. These five alternatives--perfectly elastic, relatively elastic, unit elastic, relatively inelastic, and perfectly inelastic--are often illustrated by different demand curves. The price elasticity of supply is also reflected by five comparable alternatives.

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APLS

BLUE PLACIDOLA
[What's This?]

Today, you are likely to spend a great deal of time driving to a factory outlet trying to buy either a pair of blue silicon oven mitts or a coffee cup commemorating the 2000 Olympics. Be on the lookout for crowded shopping malls.
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This isn't me! What am I?

A half gallon milk jug holds about $50 in pennies.
"The truth is not for all men, but only for those who seek it. "

-- Ayn Rand, writer

WACM
Weak Axiom of Cost Minimization
A PEDestrian's Guide
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