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LRMC: The abbreviation for long-run marginal cost, which is the change in the long-run total cost of producing a good or service resulting from a change in the quantity of output produced. Like all marginals, long-run marginal cost is the increment in the corresponding total. What's most notable about long-run marginal cost, however, is that we are operating in the long run. Unlike the short run, in which at least one input is fixed, there are no fixed inputs in the long run. As such, there is only variable cost. This means that long-run marginal cost is the result of changes in the cost of all inputs.

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FIRST RULE OF SCARCITY

The first of seven basic rules of the economy, stating that the world is faced with limited resources but unlimited wants and needs satisfied from these resources. Scarcity is THE economy problem upon which the entire study of economics is built. A primary implication of scarcity is that the pursuit of an activity results in an opportunity cost.

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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors wanting to buy either decorative picture frames or storage boxes for your income tax returns. Be on the lookout for broken fingernail clippers.
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The 1909 Lincoln penny was the first U.S. coin with the likeness of a U.S. President.
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