What This Document Is
This document is an excerpt from *Rational Expectations in Macroeconomics* by C.L.F. Attfield, D. Demery, and N.W. Duck, used within the BA 501 course at Creighton University. It introduces the challenges of understanding and measuring economic expectations, specifically focusing on the limitations of directly collecting expectations data. The excerpt then begins to lay the groundwork for the theory of rational expectations by first examining an earlier, more established approach: the adaptive expectations hypothesis. It explores how individuals adjust their future predictions based on past errors in forecasting.
Why This Document Matters
This material is crucial for students of macroeconomics, particularly those interested in modeling and forecasting economic behavior. Understanding how expectations are formed is fundamental to analyzing topics like inflation, wage negotiations, and overall economic stability. It’s typically used in upper-level undergraduate or graduate courses where a rigorous mathematical treatment of macroeconomic models is employed. This excerpt provides essential context before diving into more complex rational expectations models.
Common Limitations or Challenges
This excerpt is a foundational introduction. It does *not* provide a complete explanation of rational expectations theory itself, nor does it delve into the mathematical formulations of either adaptive or rational expectations. It also doesn’t offer empirical applications or critiques of these models. Users will still need the full text to grasp the nuances of these theories and their implications for macroeconomic policy.
What This Document Provides
This excerpt specifically covers:
* A discussion of the difficulties in obtaining reliable expectations data.
* An explanation of the adaptive expectations hypothesis, including how expectations are adjusted based on past forecast errors.
* A clear illustration of how the adaptive expectations hypothesis works with a specific example related to inflation rate predictions.
* Contextualization of the adaptive expectations hypothesis as a precursor to the more advanced theory of rational expectations.
This preview *does not* include the full development of rational expectations, mathematical models, empirical testing, or advanced applications discussed later in the book.
