Re: [Gretl-users] Generalized Methods of Moments in Gretl
On Wed, 15 Feb 2006, Al Leong wrote:
Thank you for developing a great package. I do enjoy using Gretl.
Glad to hear it!
Query:
Are you planning to develop a GMM module in gretl?
GMM is increasingly popular amongst economist, see
Hayashi(2001) and Alastair R. Hall (2005).
Not right now, but it may come, in some form. See
http://ricardo.ecn.wfu.edu/pipermail/gretl-users/2006-January/000302.html
1. Importing of Excel and other non-Gretl data file
should be more flexible. I tried importing an Excel
file without headings and could not. Have to type in
headings before import.
OK. At present CSV/text files can be opened OK without headings
(gretl will supply variable names v1, v2, ...). I think this could
be extended fairly easily to Excel imports.
2. Very often, I add new variables by defining the
variables myself. But this is 2-3 layers down the
menu.Possible to Define New variables up one level?
This could be more obvious. But note that you do have "Define new
variable" at the foot of the (top-level) Variable menu. Also,
there's a keyboard shortcut, namely 'g' (for "generate").
3. Heteroskedasticity-correction should apply to panel models or
pooled models as well (may wish to take a leave from Eviews 5).
4. Aspects of panel data modules could be improved, making it
easier to do fixed effect and random effect.Panel data is very
popular nowadays.
Yes, the handling of panel data needs some attention. Probably not
for the next release (which should be soon), but maybe for the one
after that.
5. Running White's tests for heteroskedasticity often
crash the program.
Please provide a case (datafile and script, or GUI instructions)
that produces the problem. This is not something I've heard of
(lately). Thanks.
Allin Cottrell