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MARGINAL PROPENSITY TO IMPORT: The proportion of each additional dollar of household income that is used for imports. Or alternatively, this is the change in imports due to a change in disposable income. Abbreviated MPI, the marginal propensity to import plays a minor role in modifying the aggregate expenditure line and the multiplier effect.
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Lesson 11: Elasticity Basics | Unit 4: A Continuum
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Page: 21 of 25
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- Let's end this unit with what lies in the middle of the elasticity continuum lies unit elastic.
- Unit elastic is an elasticity alternative in which any percentage change in one variable (price) causes an equal percentage change in another variable (quantity).
- This applies to both the price elasticity of demand and the price elasticity of supply, because the negative value of the price elasticity of demand is ignored.
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ACCOUNTING COST An actual outlay or expenses incurred in the production of a good that shows up in a firm's accounting statements and records. Accounting cost is an explicit payment (that is, money changing hands) incurred by a firm. Accounting cost, while very important to accountants, company CEOs, shareholders, and the Internal Revenue Service, is only minimally important to economists. The reason is that economists are more interested in economic cost (also called opportunity cost), which is the value of foregone production.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
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"It is not fair to ask of others what you are unwilling to do yourself. " -- Eleanor Roosevelt, diplomat, activist
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LME
London Metal Exchange
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