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The Strategic Use of Private Quality Standards in Food Supply Chains

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  • von Schlippenbach, Vanessa
  • Teichmann, Isabel
Abstract
This paper highlights the strategic role retailers private quality standards play in food supply chains. Considering two symmetric downstream firms that are exclusively supplied by a finite number of upstream firms and letting the upstream firms decide which retailer to supply, we show that there exist two asymmetric equilibria in the downstream firms quality requirements. The asymmetry is driven by both an increase in the retailers buyer power and the retailers competition for suppliers. The use of private quality standards induces a decrease in social welfare, which can be softened by the implementation of a public minimum quality standard.

Suggested Citation

  • von Schlippenbach, Vanessa & Teichmann, Isabel, 2011. "The Strategic Use of Private Quality Standards in Food Supply Chains," 51st Annual Conference, Halle, Germany, September 28-30, 2011 114519, German Association of Agricultural Economists (GEWISOLA).
  • Handle: RePEc:ags:gewi11:114519
    DOI: 10.22004/ag.econ.114519
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    1. Daniel P. O'Brien & Greg Shaffer, 1992. "Vertical Control with Bilateral Contracts," RAND Journal of Economics, The RAND Corporation, vol. 23(3), pages 299-308, Autumn.
    2. Christopher Kanter & Kent D. Messer & Harry M. Kaiser, 2009. "Does Production Labeling Stigmatize Conventional Milk?," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 91(4), pages 1097-1109.
    3. Rubinstein, Ariel, 1982. "Perfect Equilibrium in a Bargaining Model," Econometrica, Econometric Society, vol. 50(1), pages 97-109, January.
    4. Inderst, Roman & Wey, Christian, 2007. "Buyer power and supplier incentives," European Economic Review, Elsevier, vol. 51(3), pages 647-667, April.
    5. Fernando Balsevich & Julio A. Berdegué & Luis Flores & Denise Mainville & Thomas Reardon, 2003. "Supermarkets and Produce Quality and Safety Standards in Latin America," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 85(5), pages 1147-1154.
    6. Stefan Lutz & Thomas P. Lyon & John W. Maxwell, 2000. "Quality Leadership when Regulatory Standards are Forthcoming," Journal of Industrial Economics, Wiley Blackwell, vol. 48(3), pages 331-348, September.
    7. McAfee, R. Preston & Schwartz, Marius, 1995. "The non-existence of pairwise-proof equilibrium," Economics Letters, Elsevier, vol. 49(3), pages 251-259, September.
    8. Sofia Berto Villas-Boas, 2007. "Vertical Relationships between Manufacturers and Retailers: Inference with Limited Data," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 74(2), pages 625-652.
    9. Nash, John, 1953. "Two-Person Cooperative Games," Econometrica, Econometric Society, vol. 21(1), pages 128-140, April.
    10. Crampes, Claude & Hollander, Abraham, 1995. "Duopoly and quality standards," European Economic Review, Elsevier, vol. 39(1), pages 71-82, January.
    11. Claire Chambolle & Sofia Villas-Boas, 2007. "Buyer Power through Producer's Differentiation," Working Papers hal-00243058, HAL.
    12. Gil, Jose Maria & Gracia, Azucena & Sanchez Garcia, Mercedes, 2000. "Market Segmentation And Willingness To Pay For Organic Products In Spain," International Food and Agribusiness Management Review, International Food and Agribusiness Management Association, vol. 3(2), pages 1-20.
    13. Philippe Marcoul & Luc Veyssiere, 2010. "A Financial Contracting Approach to the Role of Supermarkets in Farmers' Credit Access," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 92(4), pages 1051-1064.
    14. Douadia Bougherara & Pierre Combris, 2009. "Eco-labelled food products: what are consumers paying for?," European Review of Agricultural Economics, Oxford University Press and the European Agricultural and Applied Economics Publications Foundation, vol. 36(3), pages 321-341, September.
    15. Battigalli, Pierpaolo & Fumagalli, Chiara & Polo, Michele, 2007. "Buyer power and quality improvements," Research in Economics, Elsevier, vol. 61(2), pages 45-61, June.
    16. Vanessa von Schlippenbach & Isabel Teichmann, 2012. "The Strategic Use of Private Quality Standards in Food Supply Chains," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 94(5), pages 1189-1201.
    17. Ken Binmore & Ariel Rubinstein & Asher Wolinsky, 1986. "The Nash Bargaining Solution in Economic Modelling," RAND Journal of Economics, The RAND Corporation, vol. 17(2), pages 176-188, Summer.
    18. Garcia Martinez, Marian & Poole, Nigel, 2004. "The development of private fresh produce safety standards: implications for developing Mediterranean exporting countries," Food Policy, Elsevier, vol. 29(3), pages 229-255, June.
    19. repec:lic:licosd:29611 is not listed on IDEAS
    20. Zhiqi Chen, 2004. "Countervailing Power and Product Diversity," Econometric Society 2004 North American Winter Meetings 279, Econometric Society.
    21. Thijs Vandemoortele & Koen Deconinck, 2014. "When Are Private Standards More Stringent than Public Standards?," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 96(1), pages 154-171.
    22. Jill J. McCluskey & Jason A. Winfree, 2009. "Pre-empting public regulation with private food quality standards," European Review of Agricultural Economics, Oxford University Press and the European Agricultural and Applied Economics Publications Foundation, vol. 36(4), pages 525-539, December.
    23. Motta, Massimo, 1993. "Endogenous Quality Choice: Price vs. Quantity Competition," Journal of Industrial Economics, Wiley Blackwell, vol. 41(2), pages 113-131, June.
    24. Marie-Luise Rau & Frank van Tongeren, 2009. "Heterogeneous firms and homogenising standards in agri-food trade: the Polish meat case," European Review of Agricultural Economics, Oxford University Press and the European Agricultural and Applied Economics Publications Foundation, vol. 36(4), pages 479-505, December.
    25. Dixit, Avinash K & Stiglitz, Joseph E, 1977. "Monopolistic Competition and Optimum Product Diversity," American Economic Review, American Economic Association, vol. 67(3), pages 297-308, June.
    26. Kathleen Brooks & Jayson L. Lusk, 2010. "Stated and Revealed Preferences for Organic and Cloned Milk: Combining Choice Experiment and Scanner Data," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 92(4), pages 1229-1241.
    27. Bokusheva, Raushan & Buchenrieder, Gertrud, 2006. "Contributions to the 4th young scientists workshop on agricultural development in Central and Eastern Europe," IAMO Discussion Papers 98, Leibniz Institute of Agricultural Development in Transition Economies (IAMO).
    28. Scheffman, David T & Spiller, Pablo T, 1992. "Buyer's Strategies, Entry Barriers, and Competition," Economic Inquiry, Western Economic Association International, vol. 30(3), pages 418-436, July.
    29. Inderst, Roman & Wey, Christian, 2003. "Bargaining, Mergers, and Technology Choice in Bilaterally Oligopolistic Industries," RAND Journal of Economics, The RAND Corporation, vol. 34(1), pages 1-19, Spring.
    30. Céline Bonnet & Pierre Dubois, 2010. "Inference on vertical contracts between manufacturers and retailers allowing for nonlinear pricing and resale price maintenance," RAND Journal of Economics, RAND Corporation, vol. 41(1), pages 139-164, March.
    31. Uri Ronnen, 1991. "Minimum Quality Standards, Fixed Costs, and Competition," RAND Journal of Economics, The RAND Corporation, vol. 22(4), pages 490-504, Winter.
    32. Stéphane Caprice, 2006. "Multilateral Vertical Contracting with an Alternative Supply: The Welfare Effects of a Ban on Price Discrimination," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 28(1), pages 63-80, February.
    33. Zhiqi Chen, 2004. "Monopoly and Product Diversity: The Role of Retailer Countervailing Power," Carleton Economic Papers 04-19, Carleton University, Department of Economics.
    34. Henrick Horn & Asher Wolinsky, 1988. "Bilateral Monopolies and Incentives for Merger," RAND Journal of Economics, The RAND Corporation, vol. 19(3), pages 408-419, Autumn.
    35. Milgrom, Paul & Roberts, John, 1990. "Rationalizability, Learning, and Equilibrium in Games with Strategic Complementarities," Econometrica, Econometric Society, vol. 58(6), pages 1255-1277, November.
    36. John C. Bernard & Daria J. Bernard, 2007. "What Is It About Organic Milk? An Experimental Analysis," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 91(3), pages 826-836.
    37. Éric Giraud-Héraud & Lamia Rouached & Louis-Georges Soler, 2006. "Private labels and public quality standards: How can consumer trust be restored after the mad cow crisis?," Quantitative Marketing and Economics (QME), Springer, vol. 4(1), pages 31-55, March.
    38. Paul W. Dobson & Michael Waterson & Stephen W. Davies, 2003. "The Patterns and Implications of Increasing Concentration in European Food Retailing," Journal of Agricultural Economics, Wiley Blackwell, vol. 54(1), pages 111-125, March.
    39. Zhifeng Gao & Ted C. Schroeder, 2007. "Effects of Label Information on Consumer Willingness-to-Pay for Food Attributes," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 91(3), pages 795-809.
    40. Bazoche Pascale & Giraud-Héraud Eric & Soler Louis-Georges, 2005. "Premium Private Labels, Supply Contracts, Market Segmentation, and Spot Prices," Journal of Agricultural & Food Industrial Organization, De Gruyter, vol. 3(1), pages 1-30, February.
    41. Marie-Laure Allain, 2002. "The Balance of Power between Producers and Retailers ; a Differentiation model," Recherches économiques de Louvain, De Boeck Université, vol. 68(3), pages 359-370.
    42. Valletti, Tommaso M, 2000. "Minimum Quality Standards under Cournot Competition," Journal of Regulatory Economics, Springer, vol. 18(3), pages 235-245, November.
    43. Carlos D. Mayen & Joseph V. Balagtas & Corinne E. Alexander, 2010. "Technology Adoption and Technical Efficiency: Organic and Conventional Dairy Farms in the United States," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 92(1), pages 181-195.
    44. Roman Inderst & Greg Shaffer, 2007. "Retail Mergers, Buyer Power and Product Variety," Economic Journal, Royal Economic Society, vol. 117(516), pages 45-67, January.
    45. Jongick Jang & Frayne Olson, 2010. "The role of product differentiation for contract choice in the agro-food sector," European Review of Agricultural Economics, Oxford University Press and the European Agricultural and Applied Economics Publications Foundation, vol. 37(2), pages 251-273, June.
    46. Codron, Jean-Marie & Giraud-Heraud, Eric & Soler, Louis-Georges, 2005. "Minimum quality standards, premium private labels, and European meat and fresh produce retailing," Food Policy, Elsevier, vol. 30(3), pages 270-283, June.
    47. Eric Giraud-Héraud & Hakim Hammoudi & Louis-Georges Soler, 2006. "Food Safety, Liability and Collective Norms," Working Papers hal-00243034, HAL.
    48. McAfee, R Preston & Schwartz, Marius, 1994. "Opportunism in Multilateral Vertical Contracting: Nondiscrimination, Exclusivity, and Uniformity," American Economic Review, American Economic Association, vol. 84(1), pages 210-230, March.
    49. David Boselie & Spencer Henson & Dave Weatherspoon, 2003. "Supermarket Procurement Practices in Developing Countries: Redefining the Roles of the Public and Private Sectors," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 85(5), pages 1155-1161.
    50. Abdelhakim Hammoudi & Ruben Hoffmann & Yves Surry, 2009. "Food safety standards and agri-food supply chains: an introductory overview," European Review of Agricultural Economics, Oxford University Press and the European Agricultural and Applied Economics Publications Foundation, vol. 36(4), pages 469-478, December.
    51. repec:bla:jindec:v:48:y:2000:i:3:p:331-48 is not listed on IDEAS
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    2. Caprice, Stéphane & von Schlippenbach, Vanessa & Wey, Christian, 2014. "Supplier Fixed costs and Retail Market Monopolization," TSE Working Papers 14-524, Toulouse School of Economics (TSE).
    3. Naegele, Helene, 2020. "Where does the Fair Trade money go? How much consumers pay extra for Fair Trade coffee and how this value is split along the value chain," World Development, Elsevier, vol. 133(C).
    4. repec:lic:licosd:33313 is not listed on IDEAS
    5. Sabine Duvaleix & Marie Lassalas & Laure Latruffe & Vasilia Konstantidelli & Irene Tzouramani, 2020. "Adopting Environmentally Friendly Farming Practices and the Role of Quality Labels and Producer Organisations: A Qualitative Analysis Based on Two European Case Studies," Sustainability, MDPI, vol. 12(24), pages 1-16, December.
    6. Ding, Huiping & Fu, Yanan & Zheng, Lucy & Yan, Zhu, 2019. "Determinants of the competitive advantage of dairy supply chains: Evidence from the Chinese dairy industry," International Journal of Production Economics, Elsevier, vol. 209(C), pages 360-373.
    7. Naegele, Helene, 2020. "Where does the Fair Trade money go? How much consumers pay extra for Fair Trade coffee and how this value is split along the value chain," EconStor Open Access Articles and Book Chapters, ZBW - Leibniz Information Centre for Economics, vol. 133, pages 1-1.
    8. Venus, Thomas J. & Drabik, Dusan & Wesseler, Justus, 2018. "The role of a German multi-stakeholder standard for livestock products derived from non-GMO feed," Food Policy, Elsevier, vol. 78(C), pages 58-67.
    9. Dipankar Das, 2019. "Multilayer of Suppliers Fixed Costs and Spatial Competition in the Upstream Market as a Source of Retailers Buying Power," Studies in Microeconomics, , vol. 7(2), pages 210-226, December.
    10. Rachael Goodhue & Leo Simon, 2016. "Agricultural contracts, adverse selection, and multiple inputs," Agricultural and Food Economics, Springer;Italian Society of Agricultural Economics (SIDEA), vol. 4(1), pages 1-33, December.
    11. Vanessa von Schlippenbach & Isabel Teichmann, 2012. "The Strategic Use of Private Quality Standards in Food Supply Chains," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 94(5), pages 1189-1201.
    12. Jianyu Yu & Zohra Bouamra-Mechemache, 2016. "Production standards, competition and vertical relationship," European Review of Agricultural Economics, Oxford University Press and the European Agricultural and Applied Economics Publications Foundation, vol. 43(1), pages 79-111.
    13. Irz, Xavier & Mazzocchi, Mario & Réquillart, Vincent & Soler, Louis-Georges, 2015. "Research in Food Economics: past trends and new challenges," Revue d'Etudes en Agriculture et Environnement, Editions NecPlus, vol. 96(01), pages 187-237, March.
    14. VENUS, Thomas J. & WESSELER, Justus H.H., 2015. "Evolution Of European Gm-Free Standards: Reasoning Of Consumers And Strategic Adoption By Companies," Review of Agricultural and Applied Economics (RAAE), Faculty of Economics and Management, Slovak Agricultural University in Nitra, vol. 18(2), pages 1-8, September.
    15. Russo, Carlo & Perito, Maria Angela & Di Fonzo, Antonella, 2014. "Using Private Food Safety Standards to Manage Complexity: A Moral Hazard Perspective," Agricultural Economics Review, Greek Association of Agricultural Economists, vol. 15(2), pages 1-15.
    16. Pio Baake & Helene Naegele, 2017. "Competition between For-Profit and Industry Labels: The Case of Social Labels in the Coffee Market," Discussion Papers of DIW Berlin 1686, DIW Berlin, German Institute for Economic Research.
    17. Rouvière, Elodie, 2016. "Small is beautiful: firm size, prevention and food safety," Food Policy, Elsevier, vol. 63(C), pages 12-22.
    18. Russo, Carlo & Perito, Maria Angel & Di Fonzo, Antonella, 2014. "The Strategic Use of Private Food Safety Standards to Manage Complexity: a Moral Hazard Perspective," 2014 International Congress, August 26-29, 2014, Ljubljana, Slovenia 182795, European Association of Agricultural Economists.
    19. repec:lic:licosd:33113 is not listed on IDEAS
    20. Hanbin Lee & Richard J. Sexton & Daniel A. Sumner, 2023. "National and subnational regulation of farm practices for consumer products sold within a jurisdiction: California's Proposition 12," Agricultural Economics, International Association of Agricultural Economists, vol. 54(6), pages 838-853, November.
    21. Wesseler, Justus, 2014. "Biotechnologies and agrifood strategies: opportunities, threats and economic implications," Bio-based and Applied Economics Journal, Italian Association of Agricultural and Applied Economics (AIEAA), vol. 3(3), pages 1-18, December.
    22. Großmann, Anne-Marie & von Gruben, Paul, 2014. "The Role of Company Standards in Supply Chains – The Case of the German Automotive Industry," Chapters from the Proceedings of the Hamburg International Conference of Logistics (HICL), in: Blecker, Thorsten & Kersten, Wolfgang & Ringle, Christian M. (ed.), Innovative Methods in Logistics and Supply Chain Management: Current Issues and Emerging Practices. Proceedings of the Hamburg International Conferenc, volume 19, pages 99-123, Hamburg University of Technology (TUHH), Institute of Business Logistics and General Management.
    23. Helene Naegele, 2019. "Where Does the Fairtrade Money Go? How Much Consumers Pay Extra for Fairtrade Coffee and How This Value Is Split along the Value Chain," Discussion Papers of DIW Berlin 1783, DIW Berlin, German Institute for Economic Research.

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    More about this item

    Keywords

    Agribusiness; Agricultural and Food Policy; Agricultural Finance; Food Consumption/Nutrition/Food Safety; Industrial Organization;
    All these keywords.

    JEL classification:

    • L15 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Information and Product Quality
    • L42 - Industrial Organization - - Antitrust Issues and Policies - - - Vertical Restraints; Resale Price Maintenance; Quantity Discounts
    • Q13 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Markets and Marketing; Cooperatives; Agribusiness

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