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Identification of Network Externalities in Markets for Non-Durables

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Author Info
Michal Grajek

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Abstract

This paper introduces a structural econometric model of consumer demand for non-durable goods, which exhibits network externalities. The structural model allows us to identify the parameters, which determine the strength of the externalities in the underlying economic model from the empirical estimation results. The estimates of these parameters can then be employed to test the economic significance of the externalities and the compatibility of networks. The identifying assumption that drives our results is that consumers care about the lagged instead of the current network size. We argue that it does not necessarily bound their rationality. To complete our structural model, we provide an example of functional specification that yields a simple linear stochastic model of demand. Using this functional specification, we identify all structural parameters of the model. In the end, the estimation and the stochastic structure of the resulting econometric model are discussed.

ZUSAMMENFASSUNG - ( Identifikation der Netzwerkeffekten in den Märkten für nicht-dauerhafte Güter)
Der vorliegende Beitrag stellt ein strukturelles ökonometrisches Modell der Konsumnachfrage für nicht-dauerhafte Güter mit externen Netzwerkeffekten vor. Das strukturelle Modell lässt uns die Parameter von Netzwerkeffekten im zugrunde liegenden ökonomischen Modell empirisch zu identifizieren. Die Schätzer der Strukturparameter könnten für das Testen der Netzwerkkompatibilität und der ökonomischen Signifikanz der Netzwerkeffekte verwendet werden. Für die Identifikation nehmen wir an, dass die Konsumenten die Netzwerksgröße verzögert wahrnehmen. Wir argumentieren, dass diese Annahme nicht notwendigerweise mit irrationalem Verhalten gleichzusetzen ist. Um das strukturelle Modell zu vollständigen, geben wir eine funktionale Spezifikation, aus der ein lineares stochastisches Nachfragemodell folgt. Unter Verwendung dieser Spezifikation sind alle Strukturparameter von dem Modell identifiziert. Zum Schluss diskutieren wir die Schätzung und die stochastische Struktur des sich ergebenden ökonometrischen Modells.

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Publisher Info
Paper provided by Wissenschaftszentrum Berlin (WZB), Research Unit: Competition and Innovation (CIG) in its series CIG Working Papers with number FS IV 02-32.

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Length: 37 pages
Date of creation: Dec 2002
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Handle: RePEc:wzb:wzebiv:fsiv02-32

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Related research
Keywords: Structural Econometric Model; Network Externalities; Innovation Diffusion;

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Find related papers by JEL classification:
C51 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Construction and Estimation
D12 - Microeconomics - - Household Behavior - - - Consumer Economics: Empirical Analysis

This paper has been announced in the following NEP Reports:

References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
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    Other versions:
  3. Blonski, Matthias, 2002. "Network externalities and two-part tariffs in telecommunication markets," Information Economics and Policy, Elsevier, vol. 14(1), pages 95-109, March. [Downloadable!] (restricted)
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  12. David Dranove and Neil Gandal., 2000. "The DVD vs. DIVX Standard War: Empirical Evidence of Vaporware," Economics Working Papers E00-293, University of California at Berkeley. [Downloadable!]
  13. Nicholas Economides & Charles Himmelberg, 1995. "Critical Mass and Network Size with Application to the US Fax Market," Working Papers 95-11, New York University, Leonard N. Stern School of Business, Department of Economics. [Downloadable!]
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  15. Jeffrey Rohlfs, 1974. "A Theory of Interdependent Demand for a Communications Service," Bell Journal of Economics, The RAND Corporation, vol. 5(1), pages 16-37, Spring. [Downloadable!] (restricted)
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    Other versions:
  19. David Dranove & Neil Gandal, 2000. "The DVD vs. DIVX Standard War: Empirical Evidence of Vaporware," Department of Economics, Working Paper Series 1019, Department of Economics, Institute for Business and Economic Research, UC Berkeley. [Downloadable!]
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  23. Gandal, Neil, 1995. "Competing Compatibility Standards and Network Externalities in the PC Software Market," The Review of Economics and Statistics, MIT Press, vol. 77(4), pages 599-608, November. [Downloadable!] (restricted)
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Full references

Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Michal Grajek, 2003. "Estimating Network Effects and Compatibility in Mobile Telecommunications," CIG Working Papers SP II 2003-26, Wissenschaftszentrum Berlin (WZB), Research Unit: Competition and Innovation (CIG). [Downloadable!]
    Other versions:
  2. Michal Grajek, 2004. "Diffusion of ISO 9000 Standards and International Trade," CIG Working Papers SP II 2004-16, Wissenschaftszentrum Berlin (WZB), Research Unit: Competition and Innovation (CIG). [Downloadable!]
  3. Laura Rinaldi, 2008. "Estimation of network externalities and critical mass in the mobile telephone market: a panel data analysis of the OECD countries," Working Papers 1_2008, D.E.S. (Department of Economic Studies), University of Naples "Parthenope", Italy. [Downloadable!]
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