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April 23, 2025 

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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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PRICE LEADERSHIP: A method used by a group of firms in the same market (typically oligopoly firms) in which one firm takes the lead in setting or changing prices, with other firms then following behind. The lead firm is often the largest firm in the industry, but it could be a smaller firm that has just historically assumed the role of price leader perhaps because it is more aware of changing market conditions. While price leadership is totally legal, it could be a sign of collusion, particular implicit collusion, in which the firms have effectively monopolized the market.

     See also | oligopoly | collusion | price rigidity | kinked-demand curve | nonprice competition | government intervention | antitrust laws |


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PRICE LEADERSHIP, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2025. [Accessed: April 23, 2025].


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FALLACY OF PERSONAL ATTACK

The logical fallacy of arguing that something is bad because someone "associated" with the thing is ugly, has a funny nose, drives a foreign car, regularly watches daytime soap operas, or wears outdated clothing. This fallacy of personal attack runs rampant in the political arena. Some politicians promote the notion that only good people propose good policies, while bad people have bad policies. The fact of the matter is that good people propose bad policies and bad people propose good policies.

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APLS

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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers seeking to buy either a genuine down-filled comforter or a 200-foot blue garden hose. Be on the lookout for pencil sharpeners with an attitude.
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The 1909 Lincoln penny was the first U.S. coin with the likeness of a U.S. President.
"The past cannot be changed. The future is yet in your power. "

-- Hugh White, U.S. Senator

JEP
Journal of Economic Perspectives
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