Displaying 20 results from an estimated 400 matches similar to: "Package plm & heterogenous slopes"
2012 Mar 08
1
Panel models: Fixed effects & random coefficients in plm
Hello,
I am using {plm} to estimate panel models. I want to estimate a model that
includes fixed effects for time and individual, but has a random individual
effect for the coefficient on the independent variable.
That is, I would like to estimate the model:
Y_it = a_i + a_t + B_i * X_it + e_it
Where i denotes individuals, t denotes time, X is my independent variable,
and B (beta) is the
2006 Aug 14
1
ARMA(1,1) for panel data
Dear List,
I am new to TS-Modeling in R. I would like to fit an ARMA(1,1) model
for a balanced panel, running Y on a full set of unit and year dummies
using an arma(1,1) for the disturbance:
y_it=unit.dummies+yeardummies+e_it
where: e_it=d*e_it-1+u_it+q*u_it-1
How can I fit this model in R? arma() does not seem to take covariates
(or I don't understand how to specify the function so that
2012 Jul 03
2
Help with lmer formula
Hey all -
I am a newbie on mixed-effects models. I want to estimate the following
model:
Y_it = alpha_0t + alpha_1t*X_it + e_it
alpha_0t = gamma_00 + u_0t
alpha_1t = gamma_10 + gamma_11*W_it + u_1j
Where Y is my outcome, X is my level-1 predictor, and W is my level 2
predictor.
I am not sure if I am doing it right. Is this the correct specification of
the formula?
model = lmer(Y ~ X + X:Y + (
2007 Mar 16
3
corAR1 in a random effects panel
Hi everyone,
I am interested in estimating this type of random effects panel:
y_it = x'_it * beta + u_it + e_it
u_it = rho * u_it-1 + d_it rho belongs to (-1, 1)
where:
u and e are independent and normally zero-mean distributed.
d is also independently normally zero-mean distributed.
So, I want random effects for group i to be correlated in t, following an
AR(1) process.
I am
2007 Mar 17
1
Correlated random effects in lme
Hello,
I am interested in estimating this type of random effects panel:
y_it = x'_it * beta + u_it + e_it
u_it = rho * u_it-1 + d_it rho belongs to (-1, 1)
where:
u and e are independently normally zero-mean distributed.
d is also independently normally zero-mean distributed.
So, I want random effects for group i to be correlated in t, following an
AR(1) process.
Any idea of how
2011 Mar 11
2
Ifs in formula
Dear r-helpers,
This might be an elementary question, but I have a hard time getting
my head around it, so all help is much appreciated.
I am working on a nonlinear regression model of the form
if z > 0
y = f1(x,y),
else
y = f2(x,t) .
In other words, the functional form of f(.) changes according to some
criteria z. Natural approach would be to fit two models, i.e.
model1 <- nlm(y ~ ...,
2010 Feb 25
2
error using pvcm() on unbalanced panel data
Dear all
I am trying to fit Variable Coefficients Models on Unbalanced Panel
Data. I managed to fit such models on balanced panel data (the example
from the "plm" vignette), but I failed to do so on my real, unbalanced
panel data.
I can reproduce the error on a modified example from the vignette:
> require(plm)
> data("Hedonic")
> Hed <- pvcm(mv ~ crim + zn + indus
2006 Jan 12
1
Problem with NLSYSTEMFIT()
Hello,
I want to solve a nonlinear 3SLS problem with "nlsystemfit()". The
equations
are of the form
y_it = f_i(x,t,theta)
The functions f_i(.) have to be formulated as R-functions. When invoking
"nlsystemfit()" I get the error
Error in deriv.formula(eqns[[i]], names(parmnames)) :
Function 'f1' is not in the derivatives table
2013 Jan 11
0
Manual two-way demeaning of unbalanced panel data (Wansbeek/Kapteyn transformation)
Dear R users,
I wish to manually demean a panel over time and entities. I tried to code
the Wansbeek and Kapteyn (1989) transformation (from Baltagi's book Ch. 9).
As a benchmark I use both the pmodel.response() and model.matrix() functions
in package plm and the results from using dummy variables. As far as I
understood the transformation (Ch.3), Q%*%y (with y being the dependent
variable)
2013 Feb 26
2
Count function calls
Dear R-users,
I have the following problem: I am running the function 'pvcm' from the 'plm' Panel Data package. Inside this function 'solve' is called and gives for a certain individual data series an exception because of singularity. I would like to know which individual data series causes this error. I tried to debug it, but this is truly painful, as solve is called
2012 Apr 08
0
[LLVMdev] Catching C++ exceptions, cleaning up, rethrowing
On Apr 8, 2012, at 4:20 AM, Bill Wendling wrote:
> On Apr 4, 2012, at 9:32 PM, Paul J. Lucas wrote:
>
>> This all seems to work just fine. I can throw a C++ exception either in a C++ object's constructor or in an ordinary member function and the stack unwinds correctly (the object's destructors are called) and the exception is propagated back up the C++ code that called the
2012 Apr 08
2
[LLVMdev] Catching C++ exceptions, cleaning up, rethrowing
On Apr 4, 2012, at 9:32 PM, Paul J. Lucas wrote:
> On Mar 23, 2012, at 4:46 PM, Bill Wendling wrote:
[...]
> This all seems to work just fine. I can throw a C++ exception either in a C++ object's constructor or in an ordinary member function and the stack unwinds correctly (the object's destructors are called) and the exception is propagated back up the C++ code that called the
2009 Sep 01
0
Package NP; npregbw; selective bandwidth selection
Dear R-users,
I am fitting a kernel regression model of the form y ~ x1 + factor(x2)
+ factor(x3) and am using the function npregbw in the np-package to
find the optimal bandwidths.
My dataset is relatively large and the optimization takes quite long.
When testing different specifications I have noticed that the optimal
bw for x3 is always very close to zero (around 10^-12 or so). I am
2006 Jun 09
7
Active DIrectory
I am building a application for my university and I would like to make this
application authenticate agains a Active Directory server. I would like to
know if there is an already built solution for this somewhere online ?
Thanks
--
Nicolas Kassis
--------------------
http://www.nickassis.net
http://www.nickassis.net/blog
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2009 Feb 10
0
Problem with PVCM: "0 (non-NA) cases"
Hello everybody,
I have a problem with the the function PVCM in the plm package:
I have an unbalanced panel with over 200 companies and 1 to 14 years for
each company. I already excluded all NAs:
> dataset<-na.omit(dataset)
Now I'm trying to fit a variable coefficients model:
> model_vc <- pvcm(v1 ~ lag(v2,1), model="within", data=dataset)
This results in the
2006 May 24
1
Valid users directive
Hi Everyone
I'm new to samba and I have been trying in vein to find a solution to
this problem. I am setting up a linux samba server as a domain member
server. It is part of the MAINT workgroup. Winbind and Samba
authenticate correctly. The issue arises when I try to limit the users
who are allowed to use a my share folder.
Most of the information I have lookup seem to say that I should
2006 Feb 03
0
Mixed-effects models / heterogenous covariances
> Message: 24
> Date: Tue, 31 Jan 2006 18:22:52 +0000
> From: "Lutz Ph. Breitling" <lutz.breitling at gmail.com>
> Subject: [R] Mixed-effects models / heterogeneous covariances
> To: r-help at stat.math.ethz.ch
> Message-ID:
> <2e38a1c80601311022i2e1be92doa60b80b50b69eb0c at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Dear
2009 Apr 09
0
Connecting to "heterogenous" cluster using makeSOCKcluster of SNOW-package
When trying to create (a very simple) cluster using makeSOCKcluster or
makeCluster I get the following error message:
> library(snow)
> cl <- makeSOCKcluster("localhost")
Fatal error: kann Datei
'~/R/i686-suse-linux-gnu-library/2.8/snow/RSOCKnode.R' nicht ?ffnen: Datei
oder Verzeichnis nicht gefunden
(translation: could not open file [...]: File or directory not
2009 Jun 16
0
Connecting to "heterogenous" cluster using makeSOCKcluster of SNOW-package
Thanks to Luke Tiernay and some experimenting I found out some issues. I
don't claim this infomation is complete, but it may be helpful for anyone
experimenting with SNOW on Linux:
- environment variables PATH and R_SNOW_LIB need to be set on master and
slaves.
(manually or permanent in ~/.bashrc (adjust your pathnames accordingly).
Don't use ~ for home directory, instead specify
2012 Mar 01
0
XCP: Heterogenous CPU support inside of Xencenter?
If XCP supports Heterogenour CPU''s and Xencenter only supports it with
advanced editons, how will XCP handle it when being used with Xencenter. I
have a bunch of different Intel Cpu''s with different steppings and would
like to be able to live migrate from within xencenter. Now I have to use
the cli commands with my xenserver network and force the migration, but
looking to move to