Talk:Beta negative binomial distribution

Error in the PMF
The PMF is inconsistent with the mean and I believe the Beta-NB generative model described in the intro. The factor in the PMF shown as Beta(alpha + r, beta + k) should be Beta(alpha + k, beta + r). I suspect there are ramifications in the rest of the article.

This probably stems from copying from a reference that uses a different success/failure parameterization for the negative binomial. — Preceding unsigned comment added by Alexandre.bouchard (talk • contribs) 00:37, 31 January 2019 (UTC)