|  | S1 | S2 | S3 | S4 | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Par | Bias | SD | MSE | Bias | SD | MSE | Bias | SD | MSE | Bias | SD | MSE |
M1 | \(\beta _1=1\) | -0.026 | 0.069 | 0.005 | -0.020 | 0.061 | 0.004 | -0.019 | 0.092 | 0.009 | -0.031 | 0.046 | 0.003 |
 | \(\beta _2=0.5\) | -0.006 | 0.103 | 0.011 | -0.002 | 0.093 | 0.009 | -0.011 | 0.113 | 0.013 | -0.014 | 0.070 | 0.005 |
M2 | \(\beta _1=1\) | 0.004 | 0.064 | 0.004 | 0.004 | 0.057 | 0.003 | 0.025 | 0.076 | 0.006 | -0.007 | 0.041 | 0.002 |
 | \(\beta _2=0.5\) | 0.008 | 0.102 | 0.010 | 0.009 | 0.092 | 0.009 | 0.011 | 0.095 | 0.009 | -0.002 | 0.069 | 0.005 |
M3 | \(\beta _1=1\) | -0.054 | 0.068 | 0.008 | -0.020 | 0.063 | 0.004 | -0.051 | 0.125 | 0.018 | -0.003 | 0.055 | 0.003 |
 | \(\beta _2=0.5\) | -0.021 | 0.100 | 0.010 | -0.002 | 0.093 | 0.009 | -0.026 | 0.106 | 0.012 | 0.000 | 0.073 | 0.005 |