Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
| From | "Anderson Edward Dr (DEV)" <Edward.Anderson@uea.ac.uk> |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
| Subject | st: Missing standard errors for Tobit model |
| Date | Wed, 31 Aug 2011 18:06:00 +0100 |
Hello, I am trying to estimate a Tobit model with quite a lot of dummy variables - around 250, with another 10-20 other explanatory variables. I have around 7,000 observations although only about 700 of these are uncensored. When I run the regression using the tobit command, STATA generates coefficient estimates but there are dots where the standard errors should be. Does anyone know if there is a way of avoiding this problem, or whether I am simplying trying to include too many dummy variables in the model? Any thoughts or advice would be much appreciated. Many thanks, Ed Anderson UEA, Norwich * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/