On the Existence of the Maximum Likelihood Estimates for Poisson Regression
We note that the existence of the maximum likelihood estimates for Poisson regression depends on the data configuration. Because standard software does not check for this problem, the practitioner may be surprised to find that in some applications estimation of the Poisson regression is unusually difficult or even impossible. More seriously, the estimation algorithm may lead to spurious maximum likelihood estimates. We identify the signs of the non-existence of the maximum likelihood estimates and propose a simple empirical strategy to single out the regressors causing this type of identification failure.
|Date of creation:||May 2009|
|Date of revision:|
|Contact details of provider:|| Web page: http://cep.lse.ac.uk/_new/publications/series.asp?prog=CEP|
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.:
- Alex Bryson & Rafael Gomez & Tobias Kretschmer & P Willman, 2009.
"Employee Voice and Private Sector Workplace Outcomes in Britain, 1980-2004,"
CEP Discussion Papers
dp0924, Centre for Economic Performance, LSE.
- Dr Alex Bryson, 2009. "Employee Voice and Private Sector Workplace Outcomes in Britain, 1980-2004," NIESR Discussion Papers 329, National Institute of Economic and Social Research.
- Alex Bryson & Rafael Gomez & Tobias Kretschmer & P. Willman, 2009. "Employee voice and private sector workplace outcomes in Britain, 1980-2004," LSE Research Online Documents on Economics 51585, London School of Economics and Political Science, LSE Library.
- Manning, Willard G. & Mullahy, John, 2001.
"Estimating log models: to transform or not to transform?,"
Journal of Health Economics,
Elsevier, vol. 20(4), pages 461-494, July.
- Willard G. Manning & John Mullahy, 1999. "Estimating Log Models: To Transform or Not to Transform?," NBER Technical Working Papers 0246, National Bureau of Economic Research, Inc.
- Gourieroux Christian & Monfort Alain & Trognon A, 1982.
"Pseudo maximum lilelihood methods : applications to poisson models,"
CEPREMAP Working Papers (Couverture Orange)
- Gourieroux, Christian & Monfort, Alain & Trognon, Alain, 1984. "Pseudo Maximum Likelihood Methods: Applications to Poisson Models," Econometrica, Econometric Society, vol. 52(3), pages 701-20, May.
- Santos Silva, J.M.C & Tenreyro, Silvana, 2005.
"The Log of Gravity,"
CEPR Discussion Papers
5311, C.E.P.R. Discussion Papers.
- Joao Santos Silva & Silvana Tenreyro, 2005. "The Log of Gravity," CEP Discussion Papers dp0701, Centre for Economic Performance, LSE.
- Joao Santos Silva & Silvana Tenreyro, 2005. "The log of gravity," LSE Research Online Documents on Economics 3744, London School of Economics and Political Science, LSE Library.
When requesting a correction, please mention this item's handle: RePEc:cep:cepdps:dp0932. 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: ()
If references are entirely missing, you can add them using this form.