Empiriceme · Evidence · Empirical Regularity

Duplication of Purchase Law

Brands share customers in proportion to market share, so competitors are rarely the ones a brand thinks they are.

Ehrenberg's finding overturns most brand positioning: a small brand's buyers are mostly light buyers of the category who also buy the leader, so the leader is always the main competitor.

In practice

  • A challenger coffee brand positions against the artisanal independent and loses most of its shoppers to the supermarket own-label.
  • A boutique gym benchmarks itself against other boutiques while its members' other membership is the budget chain.
Subject
Economics & Incentives
Essay
The regularities money obeys

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