Adam NogaSebastian JarzębowskiPiotr Maciąg2025-07-252025-07-2520202658-084510.7206/cemj.2658-0845.15https://repozytorium.kozminski.edu.pl/handle/item/1630co-productivityefficiencyvalue theoryvalue chain analysisco-productivityefficiencyvalue theoryvalue chain analysisCo-Productivity as a New Value Theory in Value Chain AnalysisCo-Productivity as a New Value Theory in Value Chain AnalysisArticle