Consumer Code

The Power of the Retailer Preference Index (ft. Erich Kahner)

January 7, 2026·50 min
Episode Description from the Publisher

In this episode, Lyden interviews Erich Kahner, Senior Director of Strategy and Insights at Dunnhumby, about the Retailer Preference Index (RPI). The RPI measures the strength of a retailer's customer value proposition and its impact on market share growth. Kahner discusses the methodology behind the RPI study, which combines consumer surveys with financial metrics, and highlights the five pillars of customer value proposition: price promotions, quality, speed and convenience, digital experience, and operations. The conversation explores shifts in consumer preferences, the importance of savings in the current economic climate, and the implications of the RPI rankings for retailers. Kahner also shares insights from global RPI studies and best practices for retailers to optimize their strategies for long-term success.Chapters:(00:30) Introduction(03:20) Understanding the Retailer Preference Index (RPI)(06:16) The Five Pillars of Customer Value Proposition(09:24) Shifts in Consumer Preferences Over Time(12:13) The Impact of Economic Factors on Retail Strategies(15:25) Quantifying the Value Proposition and Financial Outcomes(18:28) Key Takeaways from the RPI Study(21:29) The Evolving Consumer Landscape(24:41) The Shift to Digital Shopping(28:12) Consumer Frustration and Control in Grocery Shopping(29:38) Top Retailers and Market Dynamics(34:24) Strategic Groupings of Retailers(37:39) Unicorns in Retail: Balancing Quality and Savings(39:58) Challenges for Quality First Non-Conventional Retailers(44:33) Comparative Insights: US vs. Global Retail Markets(47:25) Leveraging RPI for Retail StrategyLearn more about DunnhumbyFollow Erich Kahner on: LinkedIn⁠Listen to Consumer Code on: Spotify | Apple | YouTubeFollow Lyden Foust on: LinkedIn | InstagramAbout Spatial.ai:Spatial.ai’s PersonaLive is an advanced consumer segmentation platform for developing data-driven marketing strategies. PersonaLive categorizes U.S. households into 17 groups and 80 segments using consumer behavior data from transactions, mobile visits, and social media activity, providing marketers with deep insights for effective audience targeting. From mid-sized retailers and agencies to Fortune 500 companies, hundreds of businesses use PersonaLive to drive strategic decisions and enhance marketing performance. Learn more at spatial.ai or schedule a free 30-minute demo.

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