Table 2.
Parameter estimates from CC, CCC, W, and CW estimating equations with cluster-constant standard normal covariates. Cluster sizes m ∈ {2, 3, 4, 5}. F 1(t;Z ik) = 1 − exp{ − (1 − e − t)αeβ′1Zik}
| α | γ | Censoring | Number of clusters | β1 | Equation | Coverage | |||
| 0.3 | 0.3 | 0.22 | 100 | 0.5 | CC | 0.514 | 0.140 | 0.076 | 0.717 |
| CCC | 0.514 | 0.140 | 0.134 | 0.938 | |||||
| W | 0.514 | 0.140 | 0.076 | 0.713 | |||||
| CW | 0.514 | 0.140 | 0.134 | 0.938 | |||||
| 250 | 0.5 | CC | 0.505 | 0.086 | 0.047 | 0.727 | |||
| CCC | 0.505 | 0.086 | 0.085 | 0.944 | |||||
| W | 0.505 | 0.086 | 0.047 | 0.722 | |||||
| CW | 0.505 | 0.086 | 0.085 | 0.944 | |||||
| 500 | 0.5 | CC | 0.502 | 0.061 | 0.033 | 0.719 | |||
| CCC | 0.502 | 0.061 | 0.060 | 0.948 | |||||
| W | 0.502 | 0.061 | 0.033 | 0.717 | |||||
| CW | 0.502 | 0.061 | 0.060 | 0.948 | |||||
| 0.3 | 0.7 | 0.25 | 100 | 0.5 | CC | 0.514 | 0.140 | 0.076 | 0.717 |
| CCC | 0.514 | 0.140 | 0.134 | 0.938 | |||||
| W | 0.514 | 0.140 | 0.076 | 0.712 | |||||
| CW | 0.514 | 0.140 | 0.134 | 0.938 | |||||
| 0.7 | 0.3 | 0.30 | 100 | 0.5 | CC | 0.508 | 0.116 | 0.081 | 0.834 |
| CCC | 0.508 | 0.116 | 0.112 | 0.938 | |||||
| W | 0.508 | 0.116 | 0.080 | 0.829 | |||||
| CW | 0.508 | 0.116 | 0.112 | 0.939 | |||||
| 0.7 | 0.7 | 0.32 | 100 | 0.5 | CC | 0.508 | 0.116 | 0.081 | 0.834 |
| CCC | 0.508 | 0.116 | 0.112 | 0.938 | |||||
| W | 0.508 | 0.116 | 0.080 | 0.829 | |||||
| CW | 0.508 | 0.116 | 0.112 | 0.939 |