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Abstract
We conduct a meta-analysis of studies estimating price premiums for agricultural products
differentiated by Geographical Indication (GI). Models accounting for differences across product
characteristics (food categories) and institutions (PDO, PGI, trademarks) explain a large portion
of the variance in estimated premiums. Specifically, GIs capture the highest percentage premium
in markets for products with short supply chains and relatively low added value (e.g., agricultural
commodities). The premium is lower for wine and olive oil, where alternative means of product
differentiation (e.g., branding) exist. Controlling for product characteristics, GIs adopting stricter
regulations (PDO) yield larger premiums than less regulated ones (PGI).