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Make‐or‐buy decisions in vertically differentiated input markets

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  • Duarte Brito
  • Markos Tselekounis

Abstract

We study the optimal regulatory policy when two qualitatively differentiated upstream inputs are available. We consider a setting where a vertically integrated incumbent invests in upgrading the quality of the basic upstream input it owns, whereas a rival entrant chooses between making its own upgraded input and buying either input from the incumbent at regulated prices. We show that each of the three options available for the entrant can be socially optimal, depending on the investment cost parameters. However, the socially optimal input pricing policy is quite unlikely to resolve the trade‐off between promoting welfare and encouraging investment in quality.

Suggested Citation

  • Duarte Brito & Markos Tselekounis, 2025. "Make‐or‐buy decisions in vertically differentiated input markets," Managerial and Decision Economics, John Wiley & Sons, Ltd., vol. 46(4), pages 2144-2180, June.
  • Handle: RePEc:wly:mgtdec:v:46:y:2025:i:4:p:2144-2180
    DOI: 10.1002/mde.4077
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    References listed on IDEAS

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    2. Flacher, David & Jennequin, Hugues, 2014. "Access regulation and geographic deployment of a new generation infrastructure," Telecommunications Policy, Elsevier, vol. 38(8), pages 741-759.
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    8. Marc Bourreau & Carlo Cambini & Pınar Doğan, 2014. "Access regulation and the transition from copper to fiber networks in telecoms," Journal of Regulatory Economics, Springer, vol. 45(3), pages 233-258, June.
    9. Philip Gayle & Dennis Weisman, 2007. "Are input prices irrelevant for make-or-buy decisions?," Journal of Regulatory Economics, Springer, vol. 32(2), pages 195-207, October.
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