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Quality Improvement and Process Innovation in Monopoly: A Dynamic Analysis


  • Luca Lambertini

    () (Department of Economics, University of Bologna, Italy; The Rimini Centre for Economic Analysis, Italy)

  • Raimondello Orsini

    () (Department of Economics, University of Bologna, Italy)


We investigate the R&D portfolio of a monopolist investing in cost-reducing and quality enhancing R&D. Incentives along the two directions are inversely related to the size of market demand, and independent of each other. The stability analysis shows the existence of a unique stable steady state equilibrium, which is a saddle point. Finally, we show that the monopolist undersupplies product quality as compared to the social optimum, while its investment in the abatement of marginal cost is socially efficient.

Suggested Citation

  • Luca Lambertini & Raimondello Orsini, 2015. "Quality Improvement and Process Innovation in Monopoly: A Dynamic Analysis," Working Paper series 15-12, Rimini Centre for Economic Analysis.
  • Handle: RePEc:rim:rimwps:15-12

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    References listed on IDEAS

    1. Luca Lambertini & Andrea Mantovani, 2010. "Process and product innovation: A differential game approach to product life cycle," International Journal of Economic Theory, The International Society for Economic Theory, vol. 6(2), pages 227-252.
    2. Ping Lin, 2004. "Process and product R&D by a multiproduct monopolist," Oxford Economic Papers, Oxford University Press, vol. 56(4), pages 735-743, October.
    3. Lambertini, Luca & Mantovani, Andrea, 2009. "Process and product innovation by a multiproduct monopolist: A dynamic approach," International Journal of Industrial Organization, Elsevier, vol. 27(4), pages 508-518, July.
    4. Sudipto Bhattacharya & Dilip Mookherjee, 1986. "Portfolio Choice in Research and Development," RAND Journal of Economics, The RAND Corporation, vol. 17(4), pages 594-605, Winter.
    5. Engelbert Dockner & Gustav Feichtinger, 1991. "On the optimality of limit cycles in dynamic economic systems," Journal of Economics, Springer, vol. 53(1), pages 31-50, February.
    6. Champsaur, Paul & Rochet, Jean-Charles, 1989. "Multiproduct Duopolists," Econometrica, Econometric Society, vol. 57(3), pages 533-557, May.
    7. Jaskold Gabszewicz, J. & Thisse, J. -F., 1979. "Price competition, quality and income disparities," Journal of Economic Theory, Elsevier, vol. 20(3), pages 340-359, June.
    8. Dasgupta, Partha & Maskin, Eric, 1987. "The Simple Economics of Research Portfolios," Economic Journal, Royal Economic Society, vol. 97(387), pages 581-595, September.
    9. L. Lambertini, 1995. "The Multiproduct Monopolist Under Vertical Differentiation: an Inductive Approach," Working Papers 226, Dipartimento Scienze Economiche, Universita' di Bologna.
    10. Eric Maskin & John Riley, 1984. "Monopoly with Incomplete Information," RAND Journal of Economics, The RAND Corporation, vol. 15(2), pages 171-196, Summer.
    11. Lambertini, Luca & Orsini, Raimondello, 2000. "Process and product innovation in a vertically differentiated monopoly," Economics Letters, Elsevier, vol. 68(3), pages 333-337, September.
    12. Luca Lambertini, 2003. "The monopolist's optimal R&D portfolio," Oxford Economic Papers, Oxford University Press, vol. 55(4), pages 561-578, October.
    13. Yehuda Kotowitz & Frank Mathewson, 1979. "Advertising, Consumer Information, and Product Quality," Bell Journal of Economics, The RAND Corporation, vol. 10(2), pages 566-588, Autumn.
    14. Gustav Feichtinger & Richard F. Hartl & Suresh P. Sethi, 1994. "Dynamic Optimal Control Models in Advertising: Recent Developments," Management Science, INFORMS, vol. 40(2), pages 195-226, February.
    15. Luca Lambertini, 2004. "Process and product R&D by a multiproduct monopolist: a reply to Lin," Oxford Economic Papers, Oxford University Press, vol. 56(4), pages 745-749, October.
    16. Avner Shaked & John Sutton, 1982. "Relaxing Price Competition Through Product Differentiation," Review of Economic Studies, Oxford University Press, vol. 49(1), pages 3-13.
    17. Mussa, Michael & Rosen, Sherwin, 1978. "Monopoly and product quality," Journal of Economic Theory, Elsevier, vol. 18(2), pages 301-317, August.
    18. El Ouardighi, Fouad & Kim, Bowon, 2010. "Supply quality management with wholesale price and revenue-sharing contracts under horizontal competition," European Journal of Operational Research, Elsevier, vol. 206(2), pages 329-340, October.
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    Cited by:

    1. repec:eee:proeco:v:193:y:2017:i:c:p:703-712 is not listed on IDEAS
    2. L. Lambertini, 2016. "Coordinating R&D efforts for quality improvement along a supply chain," Working Papers wp1054, Dipartimento Scienze Economiche, Universita' di Bologna.
    3. Li, Shoude & Ni, Jian, 2016. "A dynamic analysis of investment in process and product innovation with learning-by-doing," Economics Letters, Elsevier, vol. 145(C), pages 104-108.

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