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| From | "Cremades, Roger" <r.cremades@cranfield.ac.uk> |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
| Subject | st: tobit model in a percentage range |
| Date | Tue, 16 Aug 2011 18:57:12 +0000 |
Dear all, I am hesitating about using Tobit in a model with a dep var in a percentage range with values in 0 or 100, my dataset looks something like this: %ADOPTION (dep var) subsidy soil_clay asset ... more indep vars 0 1 1 200 100 0 1 590 0 0 0 700 ... ... ... ... 74 1 0 500 100 0 1 600 58 1 1 780 0 1 0 300 OLS seems to produce bias in that case and I do not find information about how to justify using Tobit model in the stata book store or in Long/Freese book, most authors do it without justify it properly and I do not know if it is appropiate as there are no really censured values under 0 or above 100, may somebody help or give advice about appropriate background to justify pros/cons of using Tobit in this cases? best greetings and wishes, Roger ENREM MSc. Cranfield University * * 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/