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PERFECT COMPETITION, SHORT-RUN PRODUCTION ANALYSIS: A perfectly competitive firm produces the profit-maximizing quantity of output that equates marginal revenue and marginal cost. This production level can be identified using total revenue and cost, marginal revenue and cost, or profit. Because a perfectly competitive firm faces a perfectly elastic demand curve, it efficiently allocates resources by equating price and marginal cost. In addition, the marginal cost curve above the average variable cost curve is the perfectly competitive firm's short-run supply curve.

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DISPOSABLE INCOME

The total income that can be used by the household sector for either consumption expenditures or saving during a given period of time, usually one year. Disposable income (DI) is one of three measures of income reported in the National Income and Product Accounts maintained by the Bureau of Economic Analysis. The other two are national income (NI) and personal income (PI). Two related measures of production are gross domestic product (GDP) and net domestic product (NDP).

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Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway seeking to buy either a printer that works with your stockpile of ink cartridges or income tax software. Be on the lookout for attractive cable television service repair people.
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The 1909 Lincoln penny was the first U.S. coin with the likeness of a U.S. President.
"When we do the best we can, we never know what miracle is wrought in our life or in the life of another. "

-- Helen Keller, lecturer, author

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