|  | S1 | S2 | S3 | S4 | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Par | Bias | SD | MSE | Bias | SD | MSE | Bias | SD | MSE | Bias | SD | MSE |
M1 | \(\beta _1=1\) | -0.032 | 0.017 | 0.001 | -0.016 | 0.015 | 0.000 | -0.125 | 0.140 | 0.035 | -0.013 | 0.015 | 0.000 |
 | \(\beta _2=0.5\) | -0.015 | 0.031 | 0.001 | -0.008 | 0.026 | 0.001 | -0.062 | 0.082 | 0.010 | -0.007 | 0.027 | 0.001 |
M2 | \(\beta _1=1\) | 0.000 | 0.011 | 0.000 | 0.000 | 0.010 | 0.000 | -0.017 | 0.029 | 0.001 | -0.004 | 0.012 | 0.000 |
 | \(\beta _2=0.5\) | 0.000 | 0.020 | 0.000 | 0.000 | 0.019 | 0.000 | -0.009 | 0.029 | 0.001 | -0.001 | 0.022 | 0.000 |
M3 | \(\beta _1=1\) | -0.023 | 0.014 | 0.001 | -0.009 | 0.012 | 0.000 | -0.097 | 0.112 | 0.022 | -0.003 | 0.012 | 0.000 |
 | \(\beta _2=0.5\) | -0.011 | 0.024 | 0.001 | -0.004 | 0.021 | 0.000 | -0.047 | 0.062 | 0.006 | -0.002 | 0.022 | 0.001 |