Economics Student Society of Australia
2026 Article Monash University Recent

Supermarkets

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  • ESSA Admin
  • Posted by ESSA Admin
August 14, 2026
10 min read

Price wars: how game theory explains tacit-collusion in Australia’s supermarket duopoly

Ask anybody to name two of Australia’s supermarkets and undoubtedly the answers will be Coles and Woolworths. Together, these two giants have 67% share of the market (ACCC, 2025).

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