Abstract
We consider a market for differentiated products, where one good is supplied by a regulated monopolist and competitive firms operate in an unregulated segment. In this setting we investigate the issue of whether to allow the monopolist to diversify into the unregulated segment by owning a competitive firm. Under asymmetric cost information, if goods are substitutes a diversified monopolist, which exaggerates its costs in the regulated segment to charge a higher regulated price, stimulates the demand for the competitive affiliate. This strengthens the firm’s incentive to inflate costs, since doing so generates a positive informational spillover to its profits in the competitive segment. Consequently, a regime of separation, which prevents the firm from operating in the competitive segment, is welfare-enhancing. Conversely, with complements, cost exaggeration in the regulated monopoly reduces the demand and harms profits in the competitive segment, and allowing the monopolist to diversify into the competitive segment therefore generates countervailing incentives, which weaken the firm’s interest in cost manipulation and improve social welfare.
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References
Anton J. J., Gertler P. J. (1988) External markets and regulation. Journal of Public Economics 37(2): 243–260
Armstrong M., Sappington D. E. M. (2007) Recent developments in the theory of regulation. In: Armstrong M., Porter R. (Eds.), Handbook of industrial organization. Elsevier Science Publisher B. V, New York, pp 1557–1700
Baron D. P., Besanko D. (1992) Information, control, and organizational structure. Journal of Economics & Management Strategy 1(2): 237–275
Baron D. P., Myerson R. B. (1982) Regulating a monopolist with unknown costs. Econometrica 50(4): 911–930
Braeutigam R. R., Panzar J. C. (1989) Diversification incentives under “Price-Based” and “Cost-Based” regulation. Rand Journal of Economics 20(3): 373–391
Calzolari G., Scarpa C. (2009) Footloose monopolies: Regulating a “National Champion”. Journal of Economics Management Strategy 18(4): 1179–1214
Calzolari, G., & Scarpa, C. (2011). On regulation and competition: Pros and cons of a diversified monopolist. mimeo.
Crandall R. W., Sidak J. G. (2002) Is structural separation of incumbent local exchange carriers necessary for competition?. Yale Journal of Regulation 19(2): 335–411
Cremer, H., Crémer, J., & De Donder, P. (2006). Legal vs ownership unbundling in network industries. CEPR Discussion Paper No. 5767.
Crew M. A., Crocker K. (1991) Diversification and regulated monopoly. In: Crew M. A. (Ed.), Competition and regulation of utilities. Kluwer Academic Publishers, Boston, MA
Crew M. A., Kleindorfer P. R., Sumpter J. (2005) Bringing competition to telecommunications by divesting the RBOCs. In: Crew M. A., Spiegel M. (Eds.), Obtaining the best from regulation and competition. Kluwer Academic Publishers, Norwell, MA
Crew M. A., Parker D. (2006) International handbook on economic regulation. Edward Elgar, Northampton
Dana J. D. (1993) The organization and scope of agents: Regulating multiproduct industries. Journal of Economic Theory 59(2): 288–310
Dixit A. (1986) Comparative statics for oligopoly. International Economic Review 27(1): 107–122
Gilbert R. J., Riordan M. H. (1995) Regulating complementary products: A comparative institutional analysis. Rand Journal of Economics 26(2): 243–256
Häckner J. (2000) A note on price and quantity competition. Journal of Economic Theory 93(2): 233–239
Höffler F., Kranz S. (2011a) Legal unbundling can be a golden mean between vertical integration and ownership separation. International Journal of Industrial Organization 29(5): 576–588
Höffler F., Kranz S. (2011b) Imperfect legal unbundling of monopolistic bottlenecks. Journal of Regulatory Economics 39(3): 273–292
Holmström B., Milgrom P. (1990) Regulating trade among agents. Journal of Institutional and Theoretical Economics 146(1): 85–105
Holmström B., Milgrom P. (1991) Multitask principal-agent analyses: Incentive contracts, asset ownership and job design [Special Issue]. Journal of Law, Economics Organization 7: 24–52
Iossa E. (1999) Informative externalities and pricing in regulated multiproduct industries. Journal of Industrial Economics 47(2): 195–219
Khalil F., Kim D., Shin D. (2006) Optimal task design: To integrate or separate planning and implementation?. Journal of Economics & Management Strategy 15(2): 457–478
Laffont J.-J., Martimort D. (2002) The theory of incentives. Princeton University Press, Princeton
Laffont J.-J., Tirole J. (1986) Using cost observation to regulate firms. Journal of Political Economy 94(3): 614–641
Lewis T. R., Sappington D. E. M. (1989a) An informational effect when regulated firms enter unregulated markets. Journal of Regulatory Economics 1(1): 35–45
Lewis T. R., Sappington D. E. M. (1989b) Countervailing incentives in agency problems. Journal of Economic Theory 49(2): 294–313
Martimort D., Pouyet J. (2008) To build or not to build: Normative and positive theories of public–private partnerships. International Journal of Industrial Organization 26(2): 393–411
Myerson R. B. (1979) Incentive compatibility and the bargaining problem. Econometrica 47(1): 61–73
Riordan M. H., Sappington D. E. M. (1987) Information, incentives, and organizational mode. Quarterly Journal of Economics 102(2): 243–263
Sappington D. E. M. (2003) Regulating horizontal diversification. International Journal of Industrial Organization 21(3): 291–315
Sappington D. E. M. (2006) On the merits of vertical divestiture. Review of Industrial Organization 29(3): 171–191
Severinov, S. (2003). Optimal organization: Centralization, decentralization or delegation? mimeo.
Sibley D. S., Weisman D. L. (1998) Raising rivals’ costs: The entry of an upstream monopolist into downstream markets. Informational Economics and Policy 10(4): 451–470
Sidak J. G., Spulber D. (1998) Deregulatory takings and the regulatory contract. Cambridge University Press, Cambridge
Singh N., Vives X. (1984) Price and quantity competition in a differentiated duopoly. Rand Journal of Economics 15(4): 546–554
Vickers J. (1995) Competition and regulation in vertically related markets. Review of Economic Studies 62(1): 1–17
Vives X. (1999) Oligopoly Pricing. MIT Press, Cambridge, MA
Vogelsang I. (2003) Price regulation of access to telecommunications networks. Journal of Economic Literature 41(3): 830–862
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Fiocco, R. Competition and regulation with product differentiation. J Regul Econ 42, 287–307 (2012). https://doi.org/10.1007/s11149-012-9195-2
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DOI: https://doi.org/10.1007/s11149-012-9195-2