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SHORT-RUN AGGREGATE MARKET: A macroeconomic model relating the price level and real production under the assumption that SOME prices inflexible, especially resource prices. The short-run aggregate market isolates the interaction between aggregate demand and short-run aggregate supply. The key assumption of this model is that SOME prices, especially resource prices, are flexible. The primary result of this model is that the economy can achieve short-run equilibrium at real production that is either greater than or less than full-employment.

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Lesson Contents
Unit 1: The Method
  • Overview
  • Components
  • A Process
  • Unit 1 Summary
  • Unit 2: Theory
  • Concept
  • Abstraction
  • Economic Theories
  • Unit 2 Summary
  • Unit 3: Verification
  • Overview & Data
  • Evaluation
  • Evaluation:Don't Agree
  • Unit 3 Summary
  • Unit 4: Science and Practice
  • Set Up
  • Theory
  • Verification
  • Unit 4 Summary
  • Unit 5: Cause and Effect
  • Purpose
  • An Example
  • Analysis
  • Unit 5 Summary
  • Course Home
    Economic Science

    In this lesson you'll see why and how the scientific method is a process of discovery. You'll see that it's a process of building theories to explain the workings of the world (the economy) by proposing then testing hypotheses. The five units making up this lesson will guide you through the basics of the scientific method and how it's used in the study of economics.

    • The first unit, The Method, introduces the scientific method, especially its' four key components -- theories, principles, hypothesis, and data.
    • The second unit, Theory, then takes a closer look at theories, including the central role played by abstraction.
    • In the third unit, Verification, we focus on the process of verification -- how and why hypothesized relationships about the workings of the economy are compared with actual data.
    • We then turn out attention in the fourth unit, Science and Practice, to a simple example of how the scientific method is used to test a hypothesized relation between course grades and where students are seated in a classroom.
    • The fifth and final unit in this lesson, Cause and Effect, examines the role that cause and effect plays in the scientific method and economic science.

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    AUTONOMOUS INVESTMENT

    Business investment expenditures that do not depend on income or production (especially national income or even gross domestic product). That is, changes in income do not generate changes in investment. Autonomous investment is best thought of as investment that the business sector undertakes regardless of the state of the economy. It is measured by the intercept term of the investment line. The alternative to autonomous investment is induced investment, which does depend on income.

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    Today, you are likely to spend a great deal of time going from convenience store to convenience store trying to buy either a T-shirt commemorating the 2000 Olympics or a genuine fake plastic Tiffany lamp. Be on the lookout for malfunctioning pocket calculators.
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    Francis Bacon (1561-1626), a champion of the scientific method, died when he caught a severe cold while attempting to preserve a chicken by filling it with snow.
    "Now is the only time there is. Make your now wow, your minutes miracles, and your days pay. Your life will have been magnificently lived and invested, and when you die you will have made a difference."

    -- Mark Victor Hansen

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