Simulation parameters
Average number of cases
Type I error rates (%)
α
σ
CP
a
/FE
b
GEE
c
-5
1
488
4.0
4.3
1.5
896
4.3
4.0
-6
1
179
3.7
4.0
1.5
336
5.0
5.1
-7
1
66
4.4
4.3
1.5
124
2.8
2.5
-8
1
25
6.2
6.0
1.5
46
4.1
4.0
a
CP, conditional Poisson model.
b
FE, fixed effects model.
c
GEE, generalized estimation equations.
Table 1:
Type I error rates from 1000 simulations under the null hypothesis, β
1
=0, when individual-specific random coefficients have a normal distribution.
