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July 12, 2025 

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IBT: The abbreviation for indirect business taxes, which is the official entry in the National Income and Product Accounts maintained by the Bureau of Economic Analysis for sales taxes. Indirect business taxes are one key difference between national income (the resource cost of production) and gross/net domestic product (the market value of production). For further discussion of this point, see gross domestic product and national income or net domestic product and national income. Indirect business taxes is generally less than 10% of gross domestic product (7-8% is common).

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TOTAL-MARGINAL RULE: A mathematical connection between a marginal value is the slope of a curve of the corresponding total value stating that the marginal IS the slope of the total curve. If the total curve has a positive slope (that is, is upward sloping), then marginal is positive. If the total product has a negative slope (downward sloping), then marginal is negative. If the total curve has a zero slope (horizontal), then marginal is zero. Moreover, if the total curve has an increasing slope (becoming steeper), then the marginal is rising. If the total curve has a decreasing slope (becoming flatter), then the marginal is falling.

     See also | slope | total product | total cost | total variable cost | marginal product | marginal cost | average-marginal rule |


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TOTAL-MARGINAL RULE, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2025. [Accessed: July 12, 2025].


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SOCIAL SCIENCE

The scientific study of society--of human behavior and of social interactions. Economics is one of several social sciences. Others are sociology, political science, and anthropology. Economics is considered a social science because it seeks to explain how society deals with the scarcity problem.

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BLACK DISMALAPOD
[What's This?]

Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors hoping to buy either a rechargeable battery for your cell phone or a T-shirt commemorating the 2000 Olympics. Be on the lookout for telephone calls from long-lost relatives.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
"What gets measured gets done."

-- Peter Drucker, educator

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Analysis of Variance
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