Nicolas RouxMarcela EslavaSantiago FrancoEric Verhoogen2026-03-222026-03-22202110.2139/ssrn.3774458https://doi.org/10.2139/ssrn.3774458https://andeanlibrary.org/handle/123456789/59714Citaciones: 2enProduction (economics)Product (mathematics)BusinessIndustrial organizationProduct differentiationEconometricsCommerceEstimating Production Functions in Differentiated-Product Industries with Quantity Information and External Instrumentsarticle