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From | Carolina Lopez <carolina.univ@gmail.com> |
To | statalist@hsphsun2.harvard.edu |
Subject | Re: st: non linear equation difficulties with nl function evaluation program |
Date | Wed, 25 Aug 2010 12:10:49 +0200 |
OK, so that is my option 4 where I get some "decent" regressions results. I did start with a simple equation, which converged and gave significant parameters. But when I extended it to this complete version, I started finding issues. The thing is as alpha, k and n are in all my terms, I cannot do (or do not know how) independent programs that then get built up on one equation to estimate. Thanks for your help, Carolina 2010/8/25 Maarten buis <maartenbuis@yahoo.co.uk>: > --- On Wed, 25/8/10, Carolina Lopez wrote: >> The thing is that n is the number of cities were the >> operator is present using the same type of contract, so it >> varies by city and year. >> >> I already calculated this, and introduced it in the data as >> a variable, to then simplify estimations. > > You can just hard code the name of that variable in your > evaluator program. Say your variable is called n, than > you type n whenever you want to use n. > > Anyhow, trying to program an equation like that right in one > go is just not going to be productive. The way to program is > to take a lot of small steps, rather than one big step. So > you must start with a much simpler equation, and than > gradualy expand it till you reach your final equation. > > Hope this helps, > Maarten > > -------------------------- > Maarten L. Buis > Institut fuer Soziologie > Universitaet Tuebingen > Wilhelmstrasse 36 > 72074 Tuebingen > Germany > > http://www.maartenbuis.nl > -------------------------- > > > > > * > * 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/ > * * 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/