I received the following message:

I am a Psychology postgraduate at the University of Glasgow and am writing for an article request. I’ve just read your 2008 published article titled “A weakly informative default prior distribution for logistic and other regression models” and found from it that your group also wrote a report on applying the Bayesian logistic regression approach to multilevel model, which is titled “An approximate EM algorithm for multilevel generalized linear models”. I have been looking for it online but did find it, and was wondering if I may request this report from you?

My first thought is that this is a good sign that psychology undergraduates are reading papers like this. Unfortunately I had to reply as follows:

Hi, we actually programmed this up but never debugged it! So no actual paper . . .

I think I could’ve done it if I had ever focused on the problem. Between the messiness of the algebra and the messiness of the R code, I never got it all to work.