bayesian inference

Sorry for an uncharacteristically technical post.  But, I've produced an excellent example of a problem that's been plaguing the widely-used phylogenetics program MrBayes and thought it might be of interest to the handful of systematists who read this blog. I've been running analyses on the Azteca y'all sent after my desperate plea last month and noticed something odd.  I set MrBayes to do two runs of 4 chains each.  After 10 million generations they produced post-stationarity consensus trees that were topologically identical (that is, the avg. st. dev. splits frequency fell to .005 after…