DPANEL user-guide a question
by Pindar
Hi there,
I have a question concerning p.146 in the user-guide:
Is this correct?
"dz = diff(z)
dpanel 1 ; y dz
dpanel 1 ; y dz ; GMM(*z*,0,0)"
Or should it be
dpanel 1 ; y dz ; GMM(*dz*,0,0)
It the first one is right, then it's because the differences of the
instruments are computed after using them as instruments,
while in the latter specification they are not altered any more.
I tried both variants in a few examples and found that the results of
dpanel 1 ; y dz
dpanel 1 ; y dz ; GMM(*dz*,0,0)
are very similar, but not the same, while
dpanel 1 ; y dz
dpanel 1 ; y dz ; GMM(*z*,0,0)
gives 'totally' different coeffietints and especially s.e. for dz.
I think it's quite crucial to understand this methodology and hence I'd
be happy for clarification.
Cheers
Leon
7 years, 10 months
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1700
by José Luis
Hello
Please, I can go down as the year of the series from 1700 to 1580?
When I download the Excel data the system will not let me do it!
Thanks!
7 years, 10 months
- 3
- 2