Underdispersion | Equidispersion | Overdispersion | ||||
---|---|---|---|---|---|---|
(γ1=−0.35andγ2=0) | (γ1=0andγ2=0) | (γ1=0.10andγ2=0) | ||||
eβ | TWIST | TLRT | TWIST | TLRT | TWIST | TLRT |
(a) α has an additive effect and eα>1 | ||||||
2 | 0.95 | 0.56 | 0.42 | 0.08 | 0.49 | 0.42 |
1 | 0.93 | 0.36 | 0.29 | 0.02 | 0.37 | 0.28 |
0.50 | 0.95 | 0.47 | 0.32 | 0.03 | 0.42 | 0.32 |
(b) α has no effect, eα=1 | ||||||
2 | 0.50 | 0.44 | 0.09 | 0.10 | 0.59 | 0.60 |
1 | 0.36 | 0.25 | 0.04 | 0.02 | 0.50 | 0.48 |
0.50 | 0.45 | 0.34 | 0.04 | 0.04 | 0.53 | 0.53 |
(c) α has an additive effect and eα<1 | ||||||
2 | 0.22 | 0.32 | 0.41 | 0.12 | 0.95 | 0.77 |
1 | 0.11 | 0.14 | 0.30 | 0.04 | 0.91 | 0.65 |
0.50 | 0.14 | 0.18 | 0.35 | 0.05 | 0.96 | 0.74 |