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LEAKAGE: A non-consumption uses of income, including saving, taxes, and imports. Leakages are combined with injections in the injection-leakage model used to identify equilibrium aggregate output in Keynesian economics. The notion of leakage is best viewed through the circular flow, in which saving, taxes, and imports are "leaked" out of the main flow between output, factor payments, national income, and consumption.

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Lesson 1: Economic Basics | Unit 2: Doing Economics Page: 4 of 18

Topic: Science and Policy <=PAGE BACK | PAGE NEXT=>

The study of economics involves both scientific investigation and policy analysis.

Economists practice both:

  • Positive economics, which uses the scientific method to uncover the basic mechanism of the economy. It seeks to describe the way this world is ARE.
  • Normative economics, which is the policy side of economics. It seeks to prescribe the way the world SHOULD BE.

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MARGINAL REVENUE PRODUCT

The change in total revenue resulting from a unit change in a variable input, keeping all other inputs unchanged. Marginal revenue product, usually abbreviated MRP, is found by dividing the change in total revenue by the change in the variable input or by multiplying marginal physical product by marginal revenue. This is also termed value of the marginal product. Marginal revenue product is a key concept for understanding the demand for productive inputs.

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Today, you are likely to spend a great deal of time lost in your local discount super center wanting to buy either a weathervane with a chicken on top or a flower arrangement with daisies and carnations for your uncle. Be on the lookout for telephone calls from former employers.
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Junk bonds are so called because they have a better than 50% chance of default, carrying a Standard & Poor's rating of CC or lower.
"Progress always involves risk. You can't steal second base and keep your foot on first. "

-- Frederick B. Wilcox

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