Re: [Gretl-users] how can I deal with this error?
On Fri, 7 Aug 2009, Zhenzeng Young wrote:
When i was estimation a simultaneous equation model, a error massage
appeared: You must include a constant in this sort of model.
Could anybody be kindly tell me the reason and how to solve the problem?
Thanks!
PS. system setting:
# set the model up as a system
system name="all"
equation pf 0 gdpr pcr kaopen
equation pcr 0 pf gdp topen fdi efw
endog pf pcr
end system
# and estimate it in various ways
estimate "all" method=ols
In the script in your email, the "equation" and "endog" lines
started with funny non-ASCII symbols. I'm not sure if that's the
issue. But your equations contain "0" (= the constant) OK.
I tried mocking up your example thus
<script>
nulldata 100
series pf = normal()
series gdp = normal()
series gdpr = normal()
series pcr = normal()
series kaopen = normal()
series topen = normal()
series fdi = normal()
series efw = normal()
system name="all"
equation pf 0 gdpr pcr kaopen
equation pcr 0 pf gdp topen fdi efw
endog pf pcr
end system
estimate "all" method=ols
</script>
This script ran without any error. What version of gretl are you
using?
Allin Cottrell