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Competition And Access Regulation In The Telecommunications Industry With Multiple Networks

  • Yan Liu
  • Guang???Zhen Sun

We develop a framework, extending the conventional duopoly model by replacing the Hotelling line with a simplex in high???dimension spaces, to study the competition and access regulation of multiple networks. We first characterize the competitive equilibrium when the substitutabilities of the networks are not too high, or the access charges are nearly cost???based. We then analyse how the equilibrium market shares respond to marginal variations in the access charges under various regimes of access regulation, and thereby examine the efficiency implications of such regulation regimes. In particular, we analyze the asymmetric scenario in which some networks are incumbent and some are entrants. It is shown that some existing results of the duopoly do not extend to a multi???firm setting, largely because regulation of multiple networks is structurally far richer.

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Paper provided by Monash University, Department of Economics in its series Monash Economics Working Papers with number 25/08.

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Length: 17 pages
Date of creation: 01 Sep 2008
Date of revision:
Handle: RePEc:mos:moswps:2008-25
Contact details of provider: Postal: Department of Economics, Monash University, Victoria 3800, Australia
Phone: +61-3-9905-2493
Fax: +61-3-9905-5476
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  1. Jonathan Morduch, 1999. "The Microfinance Promise," Journal of Economic Literature, American Economic Association, vol. 37(4), pages 1569-1614, December.
  2. de Aghion, Beatriz Armendariz & Gollier, Christian, 2000. "Peer Group Formation in an Adverse Selection Model," Economic Journal, Royal Economic Society, vol. 110(465), pages 632-43, July.
  3. Xavier Gine & Pamela Jakiela & Dean Karlan & Jonathan Morduch, 2006. "Microfinance Games," Working Papers 2102, The Field Experiments Website.
  4. Kugler, Maurice & Oppes, Rossella, 2005. "Collateral and risk sharing in group lending: evidence from an urban microcredit program," Discussion Paper Series In Economics And Econometrics 0504, Economics Division, School of Social Sciences, University of Southampton.
  5. Ghatak, Maitreesh, 2000. "Screening by the Company You Keep: Joint Liability Lending and the Peer Selection Effect," Economic Journal, Royal Economic Society, vol. 110(465), pages 601-31, July.
  6. Klaus Abbink & Bernd Irlenbusch, 2004. "Group Size and Social Ties in Microfinance Institutions," Econometric Society 2004 Far Eastern Meetings 404, Econometric Society.
  7. Ghatak, M. & Guinnane, T.W., 1998. "The Economics of Lending with Joint Liability: Theory and Practice," Papers 791, Yale - Economic Growth Center.
  8. Guttman, Joel M., 2008. "Assortative matching, adverse selection, and group lending," Journal of Development Economics, Elsevier, vol. 87(1), pages 51-56, August.
  9. Alexander S. Kritikos & Denitsa Vigenina, 2005. "Key Factors of Joint-Liability Loan Contracts: An Empirical Analysis," Kyklos, Wiley Blackwell, vol. 58(2), pages 213-238, 04.
  10. repec:ebl:ecbull:v:15:y:2005:i:9:p:1-8 is not listed on IDEAS
  11. Ghatak, Maitreesh, 1999. "Group lending, local information and peer selection," Journal of Development Economics, Elsevier, vol. 60(1), pages 27-50, October.
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