Anchoring

Categories
Decision Making
Sources
Nudge: Improving Decisions About Health, Wealth, and Happiness, Thinking, Fast and Slow

An initial value, even an arbitrary or irrelevant one, pulls subsequent estimates toward it. People adjust away from the anchor but insufficiently, so it contaminates the final judgment.

Why it Matters

Anchors shape estimates without awareness, which makes negotiation, pricing, and forecasting manipulable and unreliable. The effect persists even when the anchor is obviously random.

Signals

  • Estimates clustering near a number that was mentioned first.
  • A starting offer steering an entire negotiation.
  • Different anchors producing different "considered" answers to the same question.

Benefits

Awareness lets you set anchors deliberately and discount others'; deliberately considering the opposite blunts the pull.

Risks

Treating an anchored estimate as independent reasoning; letting the first number framed dominate the outcome.

Tensions

Some anchor is often an unavoidable starting point, yet any anchor biases the result.

Examples

A high list price raising what buyers will pay; a random number influencing estimates of an entirely unrelated quantity.