Category: Miscellaneous Statistics

Neural nets vs. regression models

Eliot Johnson writes: I have a question concerning papers comparing two broad domains of modeling: neural nets and statistical models. Both terms are catch-alls, within each of which there are, quite obviously, multiple subdomains. For instance, NNs could include ML, DL, AI, and so on. While statistical models should include panel data, time series, hierarchical […]

Ballot order update

Darren Grant writes: Thanks for bringing my work on ballot order effects to the attention of a wider audience via your recent blog post. The final paper, slightly modified from the version you posted, was published last year in Public Choice. Like you, I am not wedded to traditional hypothesis testing, but think it is […]

Wanted: Statistical success stories

Bill Harris writes: Sometime when you get a free moment, it might be great to publish a post that links to good, current exemplars of analyses. There’s a current discussion about RCTs on a program evaluation mailing list I monitor. I posted links to your power=0.06 post and your Type S and Type M post, […]

Claims about excess road deaths on “4/20” don’t add up

Sam Harper writes: Since you’ve written about similar papers (that recent NRA study in NEJM, the birthday analysis) before and we linked to a few of your posts, I thought you might be interested in this recent blog post we wrote about a similar kind of study claiming that fatal motor vehicle crashes increase by 12% after 4:20pm […]

Understanding how Anova relates to regression

Analysis of variance (Anova) models are a special case of multilevel regression models, but Anova, the procedure, has something extra: structure on the regression coefficients. As I put it in the rejoinder for my 2005 discussion paper: ANOVA is more important than ever because we are fitting models with many parameters, and these parameters can […]