Table 2.

False-Positive Rates and Statistical Power for Detecting Migration.

Simulation Model No.	9	10	11	12	13
No. of loci	10	50	50	50	50
m prior term	1	1	0.5	5.0	0.05a
False positivesb	0.025	0.042	0.075	0.200	0.0130
m1 > 2 powerc	0.1	0.25	0.95	0.667	0.600
m2 > (1,2) powerc	0.0	0.0	0.70	1.0	0.050

^aThe mean of the exponential prior distribution for migration parameters.

^bThe proportion of migration rates having true values of zero and for which the likelihood-ratio statistic did indicate that the estimated migration rate was significantly different from zero.

^cThe proportion of migration rates having true values greater than zero and for which the likelihood-ratio statistic was statistically significant so that a rate of zero is rejected.