Nicolas RouxMarcela EslavaSilvio FrancoEric Verhoogen2026-03-222026-03-22202110.2139/ssrn.3762876https://doi.org/10.2139/ssrn.3762876https://andeanlibrary.org/handle/123456789/59312Citaciones: 10enProduction (economics)Product (mathematics)Industrial organizationProduct differentiationBusinessEconometricsEstimating Production Functions in Differentiated-Product Industries with Quantity Information and External Instrumentsarticle