st: constant in a poisson regression

["Rafael Terra de Menezes" <rflterra@hotmail.com>]

Dear Stata users,

I�m begginer at stata and I would appreciate any help.


I'm working with a count model (poisson) to show the relationship between 
health and income. My dependent variable is number of chronicle diseases of 
a person and the independent variables are genderand  income, quite simple. 
I ran the regression and the LR test return awful results, and the 
coefficients were not significant. I tried to run the model without constant 
and the results were fine, including the poisgof test.
Is there any problem in suppressing the constant?

Thanks a lot

Ana Carolina Pereira Zoghbi
University of Sao Paulo
Brazil
FEARP-USP


*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/