9:28 a.m.
On Fri, 3 Jun 2011, Leandro Zipitria wrote:
I have a panel dataset and I want to delete the first 31 observations
of
each unit. I have read that one possible way is to restrict the sample and
then save it.
That's right.
genr time
smpl time > 31 --restrict
store smaller.gdt
The second one is a little more tricky. I have one dataset as a
panel, and
another that has additional information of some of the variables, but just
once. The two databases are of different length. Is there any way that gretl
merge this two databases and repeat each value of ?
Yes. Given a panel dataset of dimension N x T you can append data
with a series length of N or T and the added data will be repeated
as appropriate to complete the panel.
Allin Cottrell
9:06 p.m.
New subject: Degrees of freedom in panel data
Dear all,
Let's say I have three balanced cross sections with 20 observations
each. If I were to choose a single cross-section and perform a time series regression on
two explaining variables; admitting a constant, the corresponding degrees of freedom
should be: 20-2-1(n-k-1)=17.
Ok, what if I decide to consider the other two cross-sections for a panel
regression?. Do the degrees of freedom become: 57?(N-k-1).
Thanks
--- On Sat, 6/4/11, Allin Cottrell <cottrell(a)wfu.edu> wrote:
From: Allin Cottrell <cottrell(a)wfu.edu>
Subject: Re: [Gretl-users] how to delete observations and merge databases
To: "Gretl list" <gretl-users(a)lists.wfu.edu>
Date: Saturday, June 4, 2011, 2:28 AM
On Fri, 3 Jun 2011, Leandro Zipitria wrote:
I have a panel dataset and I want to delete the first 31 observations
of
each unit. I have read that one possible way is to restrict the sample and
then save it.
That's right.
genr time
smpl time > 31 --restrict
store smaller.gdt
The second one is a little more tricky. I have one dataset as a
panel, and
another that has additional information of some of the variables, but just
once. The two databases are of different length. Is there any way that gretl
merge this two databases and repeat each value of ?
Yes. Given a panel dataset of dimension N x T you can append data
with a series length of N or T and the added data will be repeated
as appropriate to complete the panel.
Allin Cottrell
_______________________________________________
Gretl-users mailing list
Gretl-users(a)lists.wfu.edu
http://lists.wfu.edu/mailman/listinfo/gretl-users
9:19 p.m.
New subject: Computing t-statistics from P-values
Dear all,
I have another preoccupation, I'm carrying-out a meta analysis and have to
regress 't-statistics" on some independent variables. However most studies
present "P-values" beside regression coefficients. Is there any easy way of
transforming these P-values into t-statistics of two-tailed distributions?.
Thanks in advance
--- On Sat, 6/4/11, Allin Cottrell <cottrell(a)wfu.edu> wrote:
From: Allin Cottrell <cottrell(a)wfu.edu>
Subject: Re: [Gretl-users] how to delete observations and merge databases
To: "Gretl list" <gretl-users(a)lists.wfu.edu>
Date: Saturday, June 4, 2011, 2:28 AM
On Fri, 3 Jun 2011, Leandro Zipitria wrote:
I have a panel dataset and I want to delete the first 31 observations
of
each unit. I have read that one possible way is to restrict the sample and
then save it.
That's right.
genr time
smpl time > 31 --restrict
store smaller.gdt
The second one is a little more tricky. I have one dataset as a
panel, and
another that has additional information of some of the variables, but just
once. The two databases are of different length. Is there any way that gretl
merge this two databases and repeat each value of ?
Yes. Given a panel dataset of dimension N x T you can append data
with a series length of N or T and the added data will be repeated
as appropriate to complete the panel.
Allin Cottrell
_______________________________________________
Gretl-users mailing list
Gretl-users(a)lists.wfu.edu
http://lists.wfu.edu/mailman/listinfo/gretl-users
10:31 p.m.
New subject: Computing t-statistics from P-values
I think that you can use the invcdf function to get what you want.
Best regards
John
On 7 June 2011 22:19, Anutechia Asongu <simplice_peace(a)yahoo.com> wrote:
Dear all,
I have another preoccupation, I'm carrying-out a meta analysis
and have to regress 't-statistics" on some independent variables. However
most studies present "P-values" beside regression coefficients. Is there any
easy way of transforming these P-values into t-statistics of two-tailed
distributions?.
Thanks in advance
--- On *Sat, 6/4/11, Allin Cottrell <cottrell(a)wfu.edu>* wrote:
From: Allin Cottrell <cottrell(a)wfu.edu>
Subject: Re: [Gretl-users] how to delete observations and merge databases
To: "Gretl list" <gretl-users(a)lists.wfu.edu>
Date: Saturday, June 4, 2011, 2:28 AM
On Fri, 3 Jun 2011, Leandro Zipitria wrote:
> I have a panel dataset and I want to delete the first 31 observations of
> each unit. I have read that one possible way is to restrict the sample
and
> then save it.
That's right.
genr time
smpl time > 31 --restrict
store smaller.gdt
> The second one is a little more tricky. I have one dataset as a panel,
and
> another that has additional information of some of the variables, but
just
> once. The two databases are of different length. Is there any way that
gretl
> merge this two databases and repeat each value of ?
Yes. Given a panel dataset of dimension N x T you can append data
with a series length of N or T and the added data will be repeated
as appropriate to complete the panel.
Allin Cottrell
_______________________________________________
Gretl-users mailing list
Gretl-users(a)lists.wfu.edu <http://mc/compose?to=Gretl-users@lists.wfu.edu>
http://lists.wfu.edu/mailman/listinfo/gretl-users
_______________________________________________
Gretl-users mailing list
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http://lists.wfu.edu/mailman/listinfo/gretl-users
--
John C Frain
Economics Department
Trinity College Dublin
Dublin 2
Ireland
www.tcd.ie/Economics/staff/frainj/home.html
mailto:frainj@tcd.ie
mailto:frainj@gmail.com
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