## Random local clock – rate prior

Since the rate parameter has different meaning for different settings of the `scaling`

and `ratesAreMultipliers`

settings, there are different strategies for determining the prior.

If `scaling=true`

, the rate prior should have a mean of 1, and is `scaling=false`

, the rate prior should have a mean of the expected clock rate – see clock prior for details.

Be aware that the variance of the prior should be rather small if `ratesAreMultipliers=true`

, and can be larger when `ratesAreMultipliers=false`

.

Since these are rates, they are positive values and a distribution with a positive range should be used, e.g. one of the log-normal, gamma, inverse gamma, Weibel distributions.