Posts Tagged ‘ 5 ’

Getting arm and lme4 running on the Mac

October 17, 2010
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Our "arm" package in R requires Doug Bates's "lme4" which fits multilevel models. lme4 is currently having some problems on the Mac. But installation on the Mac can be done; it just takes a bit of work. I have two...

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Mandelbrot and Akaike: from taxonomy to smooth runways (pioneering work in fractals and self-similarity)

October 16, 2010
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Mandelbrot on taxonomy (from 1955; the first publication about fractals that I know of): Searching for Mandelbrot on the blog led me to Akaike, who also recently passed away and also did interesting early work on self-similar stochastic proces...

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R vs. Stata, or, Different ways to estimate multilevel models

September 10, 2010
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Cyrus writes: I was teaching a class on multilevel modeling, and we were playing around with different method to fit a random effects logit model with 2 random intercepts---one corresponding to "family" and another corresponding to "co...

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Distorting the Electoral Connection? Partisan Representation in Confirmation Politics

July 17, 2010
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John Kastellec, Jeff Lax, and Justin Phillips write: Do senators respond to the preferences of their states' median voters or only to the preferences of their co-partisans? We study responsiveness using roll call votes on te...

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Updated R code and data for ARM

May 19, 2010
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Patricia and I have cleaned up some of the R and Bugs code and collected the data for almost all the examples in ARM. See here for links to zip files with the code and data....

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Who wants school vouchers? Rich whites and poor nonwhites

June 15, 2009
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As part of our Red State, Blue State research, we developed statistical tools for estimating public opinion among subsets of the population. Recently Yu-Sung Su, Yair Ghitza, and I applied these methods to see where school vouchers are more or...

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If you don’t use R to fit multilevel models, there’s no point in reading this one

October 6, 2007
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David Afshartous writes, What is the difference between sim() and mcsamp(), if any? If there is a difference, what should I expect in terms of difference in results? My reply:...

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Recent changes in the R package "arm" (applied regression and multilevel modeing)

September 19, 2007
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Yu-Sung writes,...

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Bayesian logistic regression software

August 23, 2006
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Aleks pointed me to this site by Alexander Genkin, David D. Lewis, and David Madigan that has a program for Bayesian logistic regression. It appears to allow some hierarchical modeling and can fit very large datasets. I haven't tried it... ...

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