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Ambiguity preferences for health.

Arthur E Attema1, Han Bleichrodt2,3, Olivier L'Haridon4

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Health Economics
|July 5, 2018
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Summary
This summary is machine-generated.

People’s health preferences differ under ambiguity versus risk, especially for health losses. Understanding ambiguity aversion is crucial for medical decision-making involving potential losses.

Keywords:
ambiguityhealth

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Area of Science:

  • Health Economics
  • Decision Analysis
  • Behavioral Economics

Background:

  • Medical decisions often involve ambiguous probabilities, not objective risks.
  • Existing health economic analyses typically overlook ambiguity preferences, equating them with risk preferences.
  • Empirical evidence indicates that ambiguity significantly influences individual preferences.

Purpose of the Study:

  • To measure health preferences under ambiguity.
  • To compare health preferences under ambiguity with those under risk.
  • To analyze the implications of ambiguity preferences for health economic evaluations.

Main Methods:

  • Utilized a general ambiguity model encompassing various proposed models.
  • Elicited and compared subject preferences for health gains and losses under both risk and ambiguity.
  • Assessed utility and loss aversion parameters in both risk and ambiguity contexts.

Main Results:

  • Health preferences for gains were consistent between risk and ambiguity.
  • Health preferences for losses showed divergence, with increased pessimism under ambiguity.
  • Utility and loss aversion parameters remained consistent across risk and ambiguity.

Conclusions:

  • Reducing ambiguity in health losses is more impactful than for health gains.
  • Utilities derived from known probabilities may not generalize to ambiguous situations.
  • Ambiguity aversion can influence the value of information analyses, particularly when losses are involved.
  • Findings are critical for medical decision-making, as interventions frequently involve losses.