Geographic market definition CMA: UK and EU merger control practice
In short: geographic market definition CMA practice asks where customers would switch if a hypothetical monopolist raised price by 5 to 10 per cent. The CMA’s 21 May 2026 Welltower decision found competition concerns in 30 local catchment areas. The CMA reaches the finding through postcode-level overlap mapping and drive-time isochrone analysis, a methodology that…
