Island Population Model
The island population model is characterised by constant population sizes, and constant birth and migration rates. The island model takes as input the effective population sizes (Ne) of each deme and the rates of migration with demes. The birth (F) and migration (G) rates array components are defined by the following formulas.
The value of xF does not affect the value of the structured tree likelihood.
<model spec='PopModelIsland' id='<ID>' demes="<ID>+"
Ne = "<DOUBLE>+" migRates="<DOUBLE>+" xF="100"
t0="<DOUBLE>" t1="<DOUBLE>" >
</model>