Empiriceme · Evidence · Bias / Effect

Decoy Effect

Also called Asymmetric dominance effect

Adding a deliberately inferior third option shifts choice between the original two.

Huber, Payne and Puto's 1982 finding. The Economist's famous subscription page offered print-only at the same price as print-plus-web; almost nobody chose it, and its presence shifted buyers to the bundle.

In practice

  • A consultancy offers a £90,000 package, a £150,000 package, and a £155,000 package that includes everything in the £150,000 one plus training.
  • A cinema's medium popcorn exists to make the large look reasonable.
Further reading
Wikipedia
Subject
Decision-making & Reasoning
Essay
The catalogue of predictable errors

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