Les Binet

Les Binet is widely regarded as one of the world's leading authorities on advertising effectiveness and marketing science. As Head of Effectiveness at the IPA, he has spent decades analysing what makes advertising work, producing landmark research that has fundamentally changed how marketers and agencies think about budget allocation, brand building, and measurable business outcomes. His work sits at the intersection of data-driven analysis and strategic marketing, making him a rare bridge between rigorous econometric thinking and practical advertising strategy. Binet is best known for his long-running collaboration with Peter Field, which produced a series of highly influential IPA reports including 'Marketing in the Era of Accountability,' 'The Long and the Short of It,' and 'Effectiveness in Context.' These works introduced the now-famous 60/40 rule — the principle that roughly 60% of marketing budgets should be devoted to long-term brand building and 40% to short-term sales activation — a framework that has been adopted by major advertisers and agencies globally. His research draws heavily on the IPA Effectiveness Databank, one of the world's largest repositories of advertising effectiveness case studies. Beyond his IPA role, Binet spent many years as a senior strategist and effectiveness lead at adam&eveDDB, one of the UK's most celebrated creative agencies, where he applied his research principles to real client work. He is a prolific speaker at industry conferences including Cannes Lions, WARC, and the IPA's own events, and his publications are considered essential reading in marketing education programmes worldwide. His influence extends into the AdTech and programmatic space through his vocal advocacy for long-term brand metrics over short-term performance proxies.

Last updated Jun 11, 2026 by ATDb automated enrichment · Connections updated Jun 15, 2026