Our article (by Yu-Sung, Jennifer, Masanao, and myself, and based also on work with Kobi, Grazia, and Peter Messeri) will be appearing in the Journal of Statistical Software, in a special issue on missing-data imputation. Here's the abstract: ... [Read more...]

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... [Read more...]

Sandra McBride writes: My current model (in Winbugs) runs very slowly on my very slow laptop, so I am getting a new desktop. Here are some questions in the hopes of speeding up my model: Is Winbugs or Openbugs multithreaded?... [Read more...]

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:... [Read more...]

Yu-Sung writes,... [Read more...]

Samantha Ross writes:... [Read more...]

This (by Aleks, Grazia, Yu-Sung, and myself) is really cool. Here's the abstract: We propose a new prior distribution for classical (non-hierarchical) logistic regression models, constructed by first scaling all nonbinary variables to have mea... [Read more...]

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... ... [Read more...]