Unfortunately, I don't think we have an automated procedure for everything. You would have to multiply impute the data, do matching on each imputed data set, and then combine it in zelig() using mi() function. But this does not require any programming. You can simply run the same matching procedure on each data set via matchit() and then feed the resulting multiple matched data sets into zelig().
Good luck,
Kosuke
Department of Politics
Princeton University
http://imai.princeton.edu
On Sep 13, 2011, at 6:02 PM, Pingaul jb wrote:
> Dear Professor,
> I’m a post-doctoral student at Montreal University. I’m actually in Columbia, working and propensity scores with a colleague and using MatchIt and Zelig. First, congratulations for your packages that are very flexible.
>
> My question is about multiple imputation and propensity scores with these softwares. From what I understand, combining both approaches would include:
>
> 1/ Doing multiple imputation and testing which variables to include.
>
> 2/ Propensity score analysis on each imputed data set and pooling the overall balance to check if it is ok (or on each data set?).
>
> 3/ Calculation of the quantities of interest for each data set
>
> 4/ Pooling the quantities across data sets.
>
> I would like to know if there is a written syntax to perform the MatchIt analysis for all of the imputed data set without having to do it manually and check the overall balance. Also, in theory, the number of individuals retained after propensity score matching and the weights can be different for each imputed data set. So that we have to perform the final analysis on each one and then pool the data with a specific procedure to take into account the eventual varying Ns? I normally use Mice package for multiple imputation but it seems that Zelig handle Amelia. My colleague seems to do be able to do all that in stata, but I’m not sure how to make all the three R packages work together.
>
> I would be very happy if you could indicate to me a reference or a place where I can find the syntax to do that (I’ve been using R for some times so I can use packages easily but I have no programming skills).
>
>
> Best Regards!
>
>
>
> Jean-Baptiste
>
-
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Zelig program information: http://gking.harvard.edu/zelig/
Dear all,
I am learning the MatchIt paper by Ho et al. in Journal of Statistical
Software (Vol. 42, No.8, 2011).
However, when I went through all the codes in this paper I met two problems
that troubled me for two days .
As a result, I need your help. Thank you very much!
In fact, all the problems once took place. Before this email, I have
checked almost all the relevant solutions (like updating the software) in
this emaillist, however it still doesn't work.
In respect to the software, I am using the most updated software, including
ZELIG (Versions 4.1-0, built: 2012-11-09) and
MatchIt (Version 2.4-20, built: 2011-10-24) and R (version 2.15.2).
Therefore, I don't think it is a problem from software.
1. In the part of estimating "Average Treatment effect on the treated", I
copy the following code into R.
x.out1 <- setx(z.out1, data = match.data(m.out1, "treat"), cond = TRUE)
However it will give a warning message as follows. Does it matter? What
order does the new Zelig support?
Warning message:
In setx.default(z.out1, data = match.data(m.out1, "treat"), cond = TRUE) :
"cond" is not currently supported by this version of Zelig
2. When I try to estimate the Average Treatment Effect (overall), I copy
the following code.
ate.all <- c(s.out1$qi$att.ev, -s.out2$qi$att.ev)
It will indicates that "Error in -s.out2$qi$att.ev : invalid argument to
unary operator", which finally make me failing to continue.
I totally copy the codes in the article. Then what happened?
Would you like to tell me how to get rid of the failure?
Thank you very much!
Best wishes,
Mao
--
Mao Weizhun
Department of Politics and Management
Chair of International Politics
University of Konstanz
Room D 246
P.O. Box D 86
D-78457 Konstanz
Germany
Phone(O):+49-7531-88-4421
Email: Weizhun.Mao(a)uni-konstanz.de
Web:http://www.polver.uni-konstanz.de/gschneider/mitarbeiter/mao-weizhun/
Hello,
I have run my probit model in Zelig after using AmeliaII to impute the data sets. When I use the "summary(z.out)" command, I receive the coefficients for 50 separate data analyses, but no combined output for all data sets together. Am I doing anything wrong?
Here is the code:
>z.out <- zelig(democ ~ loglrgdpch + loglodac + lurban + logpop + lprimsch + llife +
lfuelx + alesinae + alesinar + ldemoc + loglrgdpchldemoc +
loglodacldemoc + lurbanldemoc + logpopldemoc + lprimschldemoc +
llifeldemoc + lfuelxldemoc + alesinaeldemoc + alesinarldemoc,
model="probit",
data = mi(outdata1, outdata2,
outdata3, outdata4, outdata5, outdata6, outdata7, outdata8, outdata9, outdata10,
outdata11, outdata12, outdata13, outdata14, outdata15, outdata16, outdata17, outdata18,
outdata19, outdata20, outdata21, outdata22, outdata23, outdata24, outdata25, outdata26,
outdata27, outdata28, outdata29, outdata30, outdata31, outdata32, outdata33, outdata34,
outdata35, outdata36, outdata37, outdata38, outdata39, outdata40, outdata41, outdata42,
outdata43, outdata44, outdata45, outdata46, outdata47, outdata48, outdata49, outdata50))
>summary(z.out)
Any help would be greatly appreciated.
All best
Florian
Dear All,
I try to a fit a poisson model with sandwich estimator for a binary outcome (a technique to obtain Risk Ratios as found in Cummings, 2009, "The relative merits of riks ratios and odds ratios").Two questions:
1/ I get similar but still quite different risk ratios with zelig setx and this technique(in particular with covariates) and I would like to understand why
2/ I get an error message when I try to include weights in my call.
I send a syntax with lalonde data to illustrate the problem (see below or attached text file)
Many Thanks!!
JBP
library(MatchIt)
data(lalonde)
library(Zelig)
#Bivariate Risk ratio with zelig setx
z.out=zelig(treat~black,model="logit",data=lalonde)
summary(z.out)
x.low <- setx(z.out, black = 0)
x.high <- setx(z.out, black = 1)
s.out <- sim(z.out, x = x.low, x1 = x.high,num=10000)
summary(s.out)
#RR = 8.36
#Bivariate Risk Ratio with poisson with robust standard errors
obj <- zelig(treat~black, model = "poisson", robust=list(method="weave"), data = lalonde)
summary(obj)
exp(2.106)#=8.215314 somewhat different but similar results
#Now bivariate Risk ratio with covariate married
#setx
z.out=zelig(treat~black+married,model="logit",data=lalonde)
summary(z.out)
x.low <- setx(z.out, black = 0)
x.high <- setx(z.out, black = 1)
s.out <- sim(z.out, x = x.low, x1 = x.high,num=10000)
summary(s.out)
#RR=7.68
#poisson
obj <- zelig(treat~black+married, model = "poisson", robust=list(method="weave"), data = lalonde)
summary(obj)
exp(1.956)#7.070986 quite different results
#In my data, the results are even more striking when including a covariate
#(as for "married" here, my covariate is a binary variable and setx is taking the "mean", taking the mode gives even more different results)
#SECOND PROBLEM: fitting poisson model with robust standard error and weight
length(lalonde$treat)
#creation of false weights
lalonde$w=c(rep(1,300),rep(2,314))
#fit
obj <- zelig(treat~black+married, model = "poisson", robust=list(method="weave"), weights="w",data = lalonde)
summary(obj)
#ERROR message:
#Error in model.frame.default(formula = treat ~ black + married, data = lalonde, :
#variable lengths differ (found for '(weights)')
#I need to do that with imputed data so that it should work with the following syntax
#creation of "new" data-frame
lalonde1=lalonde
lalonde1$w=c(rep(0,100),rep(1,214),rep(2,300))
obj <- zelig(treat~black+married, model = "poisson", robust=list(method="weave"), weights="w",data = mi(lalonde,lalonde1))
summary(obj)
#observation: when I take out weights from the previous call it works,
#However, it does not include the sentence: "Robust standard errors computed using weave". like with non-imputed data. Is it normal?
> Hi,
> I am trying to run a rare events logistic regression in Zelig using R
> 2.15.2. All of my packages are updated and current.
>
> I am running an example found in your manual :
> http://people.iq.harvard.edu/~falimadh/inst/doc/relogit.pdf
> And I get an error asking for a describe function. It seems like relogit
> is a built-in model for Zelig and should not require a describe function.
>
> I would appreciate any insight you have into this. Please advise. Thank
> you very much in advance for any insight.
>
>
> ######### OUTPUT from R ########
>
> ZELIG (Versions 4.1-0, built: 2012-11-09)
>
> +----------------------------------------------------------------+
> | Please refer to http://gking.harvard.edu/zelig for full |
> | documentation or help.zelig() for help with commands and |
> | models support by Zelig. |
> | |
> | Zelig project citations: |
> | Kosuke Imai, Gary King, and Olivia Lau. (2009). |
> | ``Zelig: Everyone's Statistical Software,'' |
> | http://gking.harvard.edu/zelig |
> | and |
> | Kosuke Imai, Gary King, and Olivia Lau. (2008). |
> | ``Toward A Common Framework for Statistical Analysis |
> | and Development,'' Journal of Computational and |
> | Graphical Statistics, Vol. 17, No. 4 (December) |
> | pp. 892-913. |
> | |
> | To cite individual Zelig models, please use the citation |
> | format printed with each model run and in the documentation. |
> +----------------------------------------------------------------+
>
>
>
> > data(mid)
> > z.out1 <- zelig(conflict ~ major + contig + power + maxdem + mindem +
> years, data = mid, model = "relogit", tau = 1042/303772)
>
>
> How to cite this model in Zelig:
> Unknown Author. 2012.
> "relogit"
> in Kosuke Imai, Gary King, and Olivia Lau, "Zelig: Everyone's
> Statistical Software,"
> http://gking.harvard.edu/zelig
>
> Warning message:
> In describe.default(object) :
> The 'describe' method for this function is unspecified
>
Hello everyone,
I am using the relogit command in Zelig and am trying to graph an
interaction term in my model.
Looking through the lists, I found someone who had a similar problem a
few years back and I followed the solution posed therein:
https://lists.gking.harvard.edu/pipermail/zelig/2009-March/000808.html
However, I keep getting an error message:
Error in x[[1]]$x : $ operator is invalid for atomic vectors
I tried to use plot.ci on the example included in the Zelig manual (in
place of plot), but I got the same error message. I'm relatively new to
R, so I imagine this is probably a pretty basic fix, but I appreciate
any and all help you can provide.
Shane
My code:::
data(cbg)
cbgov.model <- zelig(comeback ~ campaign_spending + incumbent + quality_cand + lagvote + corruption + unemployment + I(incumbent*quality_cand) + I(lagvote*incumbent) + I(unemployment*incumbent) + I(corruption*incumbent), tau=0.078, model="relogit", data=cbg)
x.open <- setx(cbgov.model,unemployment= 0-4, incumbent=0)
x.incumbent <- setx(cbgov.model,unemployment= 0-4, incumbent=1)
s.out <- sim(cbgov.model, x=x.incumbent, x1=x.open)
Warning message:
In eigen(Sigma, symmetric = TRUE, EISPACK = TRUE) :
EISPACK = TRUE is deprecated
plot.ci(s.out, xlab="this is x", ylab="this is y")
Error in x[[1]]$x : $ operator is invalid for atomic vectors
--
Shane Gleason
Doctoral Candidate
Southern Illinois University:Carbondale
Department of Political Science
Faner 3172
Anthony,
Your particular error is an R problem building sources in directory paths with non ascii characters (in this case the ó). Windows allows unicode paths, but R has trouble with source builds with non ascii characters.
To change the path, either set the "lib" argument in the install.packages function to a new path, or to change the default, add a path to the top of the library location list with the .libPaths() function.
Otherwise, I ran the command you attempted:
install.packages("Zelig", repos = "http://r.iq.harvard.edu/archived/", type = "source")
successfully on OSX and Windows machines, so it is not a problem with the repository.
Anticipating another problem you may have, note, that there is an issue (see previous Zelig list posts) with .readRDS() now being defunct in R-2.15.x. (the function has been unmasked in R Core, so named simply readRDS() now). I found no problem on OSX machines, but on Windows I found that after installation of the archived Zelig 3.5, attempting the library("Zelig") command will give an error on R-2.15.2 (and it looks from your post you are using 2.15.2 on an Win machine), so you would need an older version of R, say 2.14.x, in order to run this older archived version of the Zelig library.
(Relatedly, if there is any issue in the current Zelig 4 that is not working in your application, and for which you are turning to version 3.5, let me know (on or off list) if I can help fix or address this issue more directly in the current Zelig package.)
Best,
James.
--
James Honaker, Senior Research Scientist
//// Institute for Quantitative Social Science, Harvard University
________________________________________
Tue Dec 11 16:12:53 EST 2012 Anthony Pezzola wrote:
Dear Zelig users,
I have tried to roll-back to Zelig 3.5 using the following command:
remove.packages("Zelig")
install.packages("Zelig", repos = "http://r.iq.harvard.edu/archived/", type = "source")
However, I get the following error:
******
> install.packages("Zelig", repos = "http://r.iq.harvard.edu/archived/", type = "source")
trying URL 'http://r.iq.harvard.edu/archived/src/contrib/Zelig_3.5.4.tar.gz'
Content type 'application/x-gzip' length 5711031 bytes (5.4 Mb)
opened URL
downloaded 5.4 Mb
* installing *source* package 'Zelig' ...
files inst/doc/figs/icon_minus.gif, inst/doc/figs/icon_plus.gif, inst/doc/figs/increase.eps, inst/doc/figs/increase.pdf, inst/doc/figs/roc.eps, inst/doc/figs/roc.pdf, inst/doc/figs/sample1.eps, inst/doc/figs/sample1.pdf, inst/doc/figs/sample2.eps, inst/doc/figs/sample2.pdf, inst/doc/figs/ternary.eps, inst/doc/figs/ternary.pdf, inst/doc/figs/vertci.eps, inst/doc/figs/vertci.pdf are missing
files 'DESCRIPTION', 'R/zelig2probit.R', 'inst/doc/blogit.pdf', 'inst/doc/bprobit.pdf', 'inst/doc/gamma.mixed.pdf', 'inst/doc/gamma.pdf', 'inst/doc/gamma.survey.pdf', 'inst/doc/logit.mixed.pdf', 'inst/doc/logit.pdf', 'inst/doc/logit.survey.pdf', 'inst/doc/ls.mixed.pdf', 'inst/doc/ls.pdf', 'inst/doc/negbin.pdf', 'inst/doc/normal.survey.pdf', 'inst/doc/poisson.mixed.pdf', 'inst/doc/poisson.pdf', 'inst/doc/poisson.survey.pdf', 'inst/doc/probit.mixed.pdf', 'inst/doc/probit.pdf', 'inst/doc/probit.survey.pdf', 'inst/doc/vigpics/blogit-BasicExamplePlot.pdf', 'inst/doc/vigpics/blogit-JointExamplePlot.pdf', 'inst/doc/vigpics/bprobit-BasicExamplePlot.pdf', 'inst/doc/vigpics/bprobit-JointEstimationPlot.pdf', 'inst/doc/vigpics/gamma-ExamplePlot.pdf', 'inst/doc/vigpics/gammasurvey-ExistingPlot.pdf', 'inst/doc/vigpics/gammasurvey-ReplicatePlot.pdf', 'inst/doc/vigpics/lmmixed-ExamplesPlot.pdf', 'inst/doc/vigpics/logit-ExamplePlot.pdf', 'inst/doc/vigpics/logit-FirstDifferencesPlot.pdf', 'inst/doc/vigpics/logit-ROCPlot.pdf', 'inst/doc/vigpics/logitsurvey-ExistingPlot.pdf', 'inst/doc/vigpics/logitsurvey-ReplicatePlot.pdf', 'inst/doc/vigpics/ls-DummyPlot.pdf', 'inst/doc/vigpics/ls-Example4Plot.pdf', 'inst/doc/vigpics/ls-ExamplesPlot.pdf', 'inst/doc/vigpics/negbin-Example1Plot.pdf', 'inst/doc/vigpics/normal-ExistingPlot.pdf', 'inst/doc/vigpics/normal-ReplicatePlot.pdf', 'inst/doc/vigpics/poisson-ExamplePlot.pdf', 'inst/doc/vigpics/poissonsurvey-ExistingPlot.pdf', 'inst/doc/vigpics/poissonsurvey-ReplicatePlot.pdf', 'inst/doc/vigpics/probitsurvey-ExistingPlot.pdf', 'inst/doc/vigpics/probitsurvey-ReplicatePlot.pdf', 'inst/doc/vigpics/weibull-ExamplePlot.pdf', 'inst/doc/weibull.pdf', 'man/Zelig-package.Rd' have the wrong MD5 checksums
Error in .read_description(dfile) :
file 'C:/Documents and Settings/Pezzola/Configuración local/Temp/Rtmpy8Q9tj/R.INSTALL11b03e992678/Zelig/DESCRIPTION' does not exist
ERROR: installing package DESCRIPTION failed for package 'Zelig'
* removing 'C:/Archivos de programa/R/R-2.15.2/library/Zelig'
The downloaded source packages are in
'C:\Documents and Settings\Pezzola\Configuración local\Temp\RtmpW00x9t\downloaded_packages'
Warning messages:
1: running command 'C:/ARCHIV~1/R/R-215~1.2/bin/i386/R CMD INSTALL -l "C:/Archivos de programa/R/R-2.15.2/library" C:\DOCUME~1\Pezzola\CONFIG~1\Temp\RtmpW00x9t/downloaded_packages/Zelig_3.5.4.tar.gz' had status 1
2: In install.packages("Zelig", repos = "http://r.iq.harvard.edu/archived/", :
installation of package 'Zelig' had non-zero exit status
*********
I would appreciate any help that I could get with this issue. Thank you in advance.
------------------------------
Anthony A. Pezzola
Profesor Asistente
Jefe del Magíster en Ciencia Política
Instituto de Ciencia Política
Pontificia Universidad Católica de Chile
Santiago, Chile
(56) 2 2354-7823
To be sure of hitting the target, shoot first and call whatever you hit the target.
--
James Honaker, Senior Research Scientist
//// Institute for Quantitative Social Science, Harvard University
Dear Zelig users,
I have tried to roll-back to Zelig 3.5 using the following command:
remove.packages("Zelig")
install.packages("Zelig", repos = "http://r.iq.harvard.edu/archived/", type = "source")
However, I get the following error:
******
> install.packages("Zelig", repos = "http://r.iq.harvard.edu/archived/", type = "source")
trying URL 'http://r.iq.harvard.edu/archived/src/contrib/Zelig_3.5.4.tar.gz'
Content type 'application/x-gzip' length 5711031 bytes (5.4 Mb)
opened URL
downloaded 5.4 Mb
* installing *source* package 'Zelig' ...
files inst/doc/figs/icon_minus.gif, inst/doc/figs/icon_plus.gif, inst/doc/figs/increase.eps, inst/doc/figs/increase.pdf, inst/doc/figs/roc.eps, inst/doc/figs/roc.pdf, inst/doc/figs/sample1.eps, inst/doc/figs/sample1.pdf, inst/doc/figs/sample2.eps, inst/doc/figs/sample2.pdf, inst/doc/figs/ternary.eps, inst/doc/figs/ternary.pdf, inst/doc/figs/vertci.eps, inst/doc/figs/vertci.pdf are missing
files 'DESCRIPTION', 'R/zelig2probit.R', 'inst/doc/blogit.pdf', 'inst/doc/bprobit.pdf', 'inst/doc/gamma.mixed.pdf', 'inst/doc/gamma.pdf', 'inst/doc/gamma.survey.pdf', 'inst/doc/logit.mixed.pdf', 'inst/doc/logit.pdf', 'inst/doc/logit.survey.pdf', 'inst/doc/ls.mixed.pdf', 'inst/doc/ls.pdf', 'inst/doc/negbin.pdf', 'inst/doc/normal.survey.pdf', 'inst/doc/poisson.mixed.pdf', 'inst/doc/poisson.pdf', 'inst/doc/poisson.survey.pdf', 'inst/doc/probit.mixed.pdf', 'inst/doc/probit.pdf', 'inst/doc/probit.survey.pdf', 'inst/doc/vigpics/blogit-BasicExamplePlot.pdf', 'inst/doc/vigpics/blogit-JointExamplePlot.pdf', 'inst/doc/vigpics/bprobit-BasicExamplePlot.pdf', 'inst/doc/vigpics/bprobit-JointEstimationPlot.pdf', 'inst/doc/vigpics/gamma-ExamplePlot.pdf', 'inst/doc/vigpics/gammasurvey-ExistingPlot.pdf', 'inst/doc/vigpics/gammasurvey-ReplicatePlot.pdf', 'inst/doc/vigpics/lmmixed-ExamplesPlot.pdf', 'inst/doc/vigpics/logit-ExamplePlot.pdf', 'inst/doc/vigpics/logit-FirstDifferencesPlot.pdf', 'inst/doc/vigpics/logit-ROCPlot.pdf', 'inst/doc/vigpics/logitsurvey-ExistingPlot.pdf', 'inst/doc/vigpics/logitsurvey-ReplicatePlot.pdf', 'inst/doc/vigpics/ls-DummyPlot.pdf', 'inst/doc/vigpics/ls-Example4Plot.pdf', 'inst/doc/vigpics/ls-ExamplesPlot.pdf', 'inst/doc/vigpics/negbin-Example1Plot.pdf', 'inst/doc/vigpics/normal-ExistingPlot.pdf', 'inst/doc/vigpics/normal-ReplicatePlot.pdf', 'inst/doc/vigpics/poisson-ExamplePlot.pdf', 'inst/doc/vigpics/poissonsurvey-ExistingPlot.pdf', 'inst/doc/vigpics/poissonsurvey-ReplicatePlot.pdf', 'inst/doc/vigpics/probitsurvey-ExistingPlot.pdf', 'inst/doc/vigpics/probitsurvey-ReplicatePlot.pdf', 'inst/doc/vigpics/weibull-ExamplePlot.pdf', 'inst/doc/weibull.pdf', 'man/Zelig-package.Rd' have the wrong MD5 checksums
Error in .read_description(dfile) :
file 'C:/Documents and Settings/Pezzola/Configuración local/Temp/Rtmpy8Q9tj/R.INSTALL11b03e992678/Zelig/DESCRIPTION' does not exist
ERROR: installing package DESCRIPTION failed for package 'Zelig'
* removing 'C:/Archivos de programa/R/R-2.15.2/library/Zelig'
The downloaded source packages are in
'C:\Documents and Settings\Pezzola\Configuración local\Temp\RtmpW00x9t\downloaded_packages'
Warning messages:
1: running command 'C:/ARCHIV~1/R/R-215~1.2/bin/i386/R CMD INSTALL -l "C:/Archivos de programa/R/R-2.15.2/library" C:\DOCUME~1\Pezzola\CONFIG~1\Temp\RtmpW00x9t/downloaded_packages/Zelig_3.5.4.tar.gz' had status 1
2: In install.packages("Zelig", repos = "http://r.iq.harvard.edu/archived/", :
installation of package 'Zelig' had non-zero exit status
*********
I would appreciate any help that I could get with this issue. Thank you in advance.
------------------------------
Anthony A. Pezzola
Profesor Asistente
Jefe del Magíster en Ciencia Política
Instituto de Ciencia Política
Pontificia Universidad Católica de Chile
Santiago, Chile
(56) 2 2354-7823
To be sure of hitting the target, shoot first and call whatever you hit the target.
Hi - Zelig 4.1 has been released on CRAN. More information on Zelig and its recent changes can be found here:
http://projects.iq.harvard.edu/zelig
Regards,
Matt Owen
Software Maintainer, Zelig
Attached please find the official announcement:
- Zelig 4.1 is now on CRAN! -
Zelig 4.1 has been released and is downloadable from CRAN. This release adds:
1. Integration of several Zelig add-on packages to the core models
(e.g. "General Estimating Equations," "Survey-weighted regressions," etc.)
2. Bug fixes for particular statistical models
3. Informative error messages
For the full documentation for Zelig 4.1, see:
http://projects.iq.harvard.edu/zelig/documentation
For developer information, see:
http://projects.iq.harvard.edu/zelig/developers
- Zelig 4 Structural Changes -
While most features of Zelig have remained unchanged, the original software
package has been divided into five distinct packages: Zelig, ZeligChoice,
ZeligGAM, ZeligMultilevel and ZeligNetwork. These packages correspond directly
to particular classes of statistical models: discrete choice models, general
additive models, multilevel models, and network regression models. All other
models from Zelig 3.5 remain in the main Zelig package.
For a complete list of statistical models in Zelig, refer to:
http://projects.iq.harvard.edu/zelig/models
General information on what's new can be found on the IQSS Zelig Project's page
here:
http://projects.iq.harvard.edu/zelig/whats-new
- Zelig 4 for Developers -
Zelig 4 continues its tradition of being "Everyone's Statistical Software,"
while now catering to developers with an API geared towards simplifying the
development of statistical models. This means adding your statistical model to
the Zelig software suite is easier than ever.
- Install Zelig! -
Instructions on installing Zelig 4 can be found on the IQSS Zelig Project's
page here:
http://projects.iq.harvard.edu/zelig/install
- Contribute to Zelig! -
Developers can contribute to the Zelig project in numerous ways. Using the new
API, any statistical package can be written to operate using Zelig's interface.
To learn more about contributing to Zelig, visit the IQSS Zelig Project's page
here:
http://projects.iq.harvard.edu/zelig/developers
The latest version of the source code can be found on GitHub:
https://github.com/iqss/Zelig
The full collection of Zelig packages can be found here:
https://github.com/iqss/
- Join the discussion! -
Zelig 4 is now on Google Groups! Discuss Zelig development and issues
on this forum. Additionally, the latest news, help, and bug fixes are
all available here:
http://bit.ly/Rw717L
- Zelig 3.5 -
Zelig 3.5 is still available for download via Harvard IQSS at:
http://r.iq.harvard.edu/archived/src/contrib/Zelig_3.5.4.tar.gz
This can be downloaded installed automatically via an R-terminal by entering:
install.packages("Zelig", repos="http://r.iq.harvard.edu/archived/", type="source")
