Individuals                       Number of events (n)  N Test 2 10 50 50 Permutation 0.168 (0.0118) 0.988 (0.0034) 1.000 (0.0000)   Mixture 0.126 (0.0105) 0.976 (0.0048) 1.000 (0.0000) 100 Permutation 0.273 (0.0141) 1.000 (0.0000) 1.000 (0.0000)   Mixture 0.257 (0.0138) 1.000 (0.0000) 1.000 (0.0000) 200 Permutation 0.457 (0.0158) 1.000 (0.0000) 1.000 (0.0000)   Mixture 0.572 (0.0156) 1.000 (0.0000) 1.000 (0.0000)

Table 2: Empirical power of the score test for a frailty model (standard error in parenthesis).