BEAST 2 Help Me Choose

# BEAST 2 Help Me Choose Death rate prior

## Death rate prior

The death rate prior is the prior on the relative death rate of the birth-death tree prior.

Let $\lambda$ be the birth rate, and $\mu$ be the death rate of the model then $m = \mu/\lambda$. Since $\mu$ and $\lambda$ are rates, thus positive, $m$ is lower bounded by 0. If $m>1$ this implies $\mu>\lambda$ thus extinction exceeds speciation and we should expect the process to produce no taxa. It is reasonable to assume $0<m<1$. Unless there is more information available, a uniform(0,1) prior on $m$ seesm reasonable.

## Bayesian evolutionary analysis by sampling trees

Disclaimer: The above is the opinion of the author RB. If you do not agree, or spot a mistake, contact the author, or discuss this in the issues area or raise a new issue. A link will be added from this page to make sure others can find it.

Served through Jekyll, customised theme based on the twentyfourteen wordpress theme.