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Appendix C - Multi-attribute expected utility theory

Published online by Cambridge University Press:  05 June 2012

Paul R. Kleindorfer
Affiliation:
University of Pennsylvania
Howard G. Kunreuther
Affiliation:
University of Pennsylvania
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Summary

This appendix illustrates how multi-attribute utility (MAU) theory can be applied to risky or uncertain alternatives. Since the process involved is somewhat intricate, we shall lay the problem out in discrete steps and stages as follows.

  1. Determine a reasonable family (or class) of utility functions (using explicit assumptions about the person's preferences or just proceeding purely pragmatically).

  2. Using a set of historical revealed preferences or hypothetical preferences questions, determine a number of equations and inequalities.

  3. Using eyeball techniques, regression analysis, algebraic manipulations, and so forth, interpret these revealed preferences in terms of the parameters of a particular utility function within the assumed class.

In our experience, the richer the set of revealed preferences in (2), the better the chances are of understanding the decision maker's preference structure.

The remainder of this appendix offers a numerical illustration of the steps involved and concludes with the general case.

Numerical illustration

Problem: How to choose consistently among two job offers (Job Ā, Job B) characterized as risk profiles along three dimensions.

Dimensions: x1 = job satisfaction (on a scale from 0 to 100)

x2 = average present value of annual salary over first three years (ranging from $20,000 to $40,000)

x3 = quality of living in job location (on a scale from 0 to 10)

Objective: Construct a utility function U(x1,x2,x3) such that E[U{x1{Ā), x2(Ā), x3(Ā)}] > E[U{x1{B), x2(B), x3(B)}] if and only if Job Ā is preferred to Job B.

Type
Chapter
Information
Decision Sciences
An Integrative Perspective
, pp. 421 - 428
Publisher: Cambridge University Press
Print publication year: 1993

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