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F5-04·F5 — Brand Strategy

How Brands Grow: The Ehrenberg-Bass Challenge

The productive tension

Penetrationandloyalty (but penetration wins the evidence)

The synthesis

Sharp's evidence is compelling: growth comes from penetration, not loyalty. But practitioners cannot simply abandon loyalty programs and CRM. The Both/And: prioritise penetration strategies while recognising that loyalty is an outcome of penetration, not an alternative strategy.

Learning objectives

  • Explain the Ehrenberg-Bass laws of marketing science
  • Define double jeopardy, the duplication of purchase law, and natural monopoly
  • Articulate why penetration drives growth more than loyalty
  • Critically evaluate Sharp's position against traditional brand management
  • Apply NBD-Dirichlet model implications to brand strategy
  • Understand the Both/And of penetration and loyalty

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