At 11:03 PM 3/25/2007, David Cobey wrote:
I'm trying to estimate the percentage of an area under high yield variety
crops as time changes. I hoping to estimate a basic S shaped technology
diffusion model. Can I use logit and probit for a continuous dependant
variable ranging from 0-1 or does logit/probit only work for discrete
variables?
If logit and probit won't work, how should I estimate this S shaped model?
Example of data -
Year Percentage
1965 0
1966 .1
1967 .3
1968 .6
1969 .8
1970 .9
1971 1
Thanks!
David
These links might help:
http://www.stata.com/support/faqs/stat/logit.html
http://www.ats.ucla.edu/stat/stata/faq/proportion.htm
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Richard Williams, Notre Dame Dept of Sociology
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