Advanced Search
MyIDEAS: Login

Heterogeneity, Excess Zeros, and the Structure of Count Data Models

Contents:

Author Info

  • Mullahy, John

Abstract

This paper demonstrates that the unobserved heterogeneity commonly assumed to be the source of overdispersion in count data models has predictable implications for the probability structure of such mixture models. In particular, the common observation of excess zeros is a strict implication of unobserved heterogeneity. This result has important implications for using count model estimates for predicting certain interesting parameters. Test statistics do detect such heterogeneity-related departures from the null model are proposed and applied in a health-care utilization example, suggesting that a null Poisson model should be rejected in favour of a mixed alternative.

Download Info

If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
File URL: http://qed.econ.queensu.ca:80/jae/1997-v12.3/
File Function: Supporting data files and programs
Download Restriction: no

Bibliographic Info

Article provided by John Wiley & Sons, Ltd. in its journal Journal of Applied Econometrics.

Volume (Year): 12 (1997)
Issue (Month): 3 (May-June)
Pages: 337-50

as in new window
Handle: RePEc:jae:japmet:v:12:y:1997:i:3:p:337-50

Contact details of provider:
Web page: http://www.interscience.wiley.com/jpages/0883-7252/

Order Information:
Email:
Web: http://www3.interscience.wiley.com/jcatalog/subscribe.jsp?issn=0883-7252

Related research

Keywords:

References

No references listed on IDEAS
You can help add them by filling out this form.

Citations

Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
as in new window

Cited by:
  1. Rosemary J. Avery & Donald S. Kenkel & Dean R. Lillard & Alan D. Mathios, 2006. "Regulating Advertisements: The Case of Smoking Cessation Products," NBER Working Papers 12001, National Bureau of Economic Research, Inc.
  2. Iversen, Tor & Kopperud, Gry Stine, 2009. "The impact of accessibility on the use of specialist health care in Norway," HERO On line Working Paper Series 2002:9, Oslo University, Health Economics Research Programme.
  3. Woo, Mi-Ja & Sriram, T.N., 2007. "Robust estimation of mixture complexity for count data," Computational Statistics & Data Analysis, Elsevier, vol. 51(9), pages 4379-4392, May.
  4. Eva Cantoni & Elvezio Ronchetti, 2004. "A robust approach for skewed and heavy-tailed outcomes in the analysis of health care expenditures," Research Papers by the Department of Economics, University of Geneva 2004.03, Département des Sciences Économiques, Université de Genève.
  5. Ginés Guirao Pérez & Victor Javier Cano Fernández & Marta Isabel López Yurda & María Carolina Rodríguez Donate & Margarita Esther Romero Rodríguez, 2004. "Relación entre la frecuencia de consumo de vino y algunas características socioeconómicas de los individuos," Documentos de trabajo conjunto ULL-ULPGC 2004-01, Facultad de Ciencias Económicas de la ULPGC.
  6. William H. Greene & David A. Hensher, 2008. "Modeling Ordered Choices: A Primer and Recent Developments," Working Papers 08-26, New York University, Leonard N. Stern School of Business, Department of Economics.
  7. Ulrich Kaiser & Hans Christian Kongsted & Thomas Ronde, 2013. " Does the Mobility of R & D Labor Increase Innovation?," Working Papers 336, University of Zurich, Department of Business Administration (IBW).
  8. Ejsing, Ann-Kathrine & Kaiser, Ulrich & Kongsted, Hans Christian & Laursen, Keld, 2013. "The Role of University Scientist Mobility for Industrial Innovation," IZA Discussion Papers 7470, Institute for the Study of Labor (IZA).
  9. Martine Visser & Frikkie Booysen, 2004. "Determinants of the choice of health care facility utilised by individuals in HIV/AIDS-affected households in the Free State province of South Africa," SALDRU/CSSR Working Papers 087, Southern Africa Labour and Development Research Unit, University of Cape Town.
  10. Mailu, Stephen & Kuloba, Bernard & Ruto, Eric & Nyangena, Wilfred, 2010. "Effect of cropping policy on landowner reactions towards wildlife: a case of Naivasha area, Kenya," MPRA Paper 21308, University Library of Munich, Germany.
  11. Tor Iversen & Gry Stine Kopperud, 2005. "Regulation versus practice - the impact of accessibility on the use of specialist health care in Norway," Health Economics, John Wiley & Sons, Ltd., vol. 14(12), pages 1231-1238.
  12. Miguel Manjón-Antolín & Josep-Maria Arauzo-Carod, 2011. "Locations and relocations: determinants, modelling, and interrelations," The Annals of Regional Science, Springer, vol. 47(1), pages 131-146, August.
  13. McDougal, Topher & Caruso, Raul, 2013. "Wartime Violence and Post-Conflict Development Policy: The Case of Agricultural Concessions in Mozambique," NEPS Working Papers 1/2013, Network of European Peace Scientists.
  14. Arauzo Carod, Josep Maria & Manjón Antolín, Miguel C., 2007. "Locations and Relocations:Modelling, Determinants, and Interrelations," Working Papers 2072/5316, Universitat Rovira i Virgili, Department of Economics.
  15. Alka Chadha, 2005. "Trips and Patenting Activity: Evidence from the Indian Pharmaceutical Industry," Departmental Working Papers wp0512, National University of Singapore, Department of Economics.
  16. Brutscher, P., 2012. "Self-Disconnection Among Pre-Payment Customers - A Behavioural Analysis," Cambridge Working Papers in Economics 1214, Faculty of Economics, University of Cambridge.
  17. Margarita E. Romero Rodríguez & Enrique Los Arcos & Victor Cano Fernández & Miguel Sánchez Padrón, 2001. "Modelo para datos de recuentro de corte transversal con exceso de ceros. Aplicación a citas patentes," Documentos de trabajo conjunto ULL-ULPGC 2001-05, Facultad de Ciencias Económicas de la ULPGC.
  18. Rui Baptista & Joana Mendonça, 2010. "Proximity to knowledge sources and the location of knowledge-based start-ups," The Annals of Regional Science, Springer, vol. 45(1), pages 5-29, August.
  19. Josep-Maria Arauzo-Carod & Miguel Manjón-Antolín, 2012. "(Optimal) spatial aggregation in the determinants of industrial location," Small Business Economics, Springer, vol. 39(3), pages 645-658, October.

Lists

This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

Statistics

Access and download statistics

Corrections

When requesting a correction, please mention this item's handle: RePEc:jae:japmet:v:12:y:1997:i:3:p:337-50. See general information about how to correct material in RePEc.

For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Wiley-Blackwell Digital Licensing) or (Christopher F. Baum).

If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

If references are entirely missing, you can add them using this form.

If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

Please note that corrections may take a couple of weeks to filter through the various RePEc services.