Figure 4.

Accuracy of NPEB method vs. Tang et al.’s (2002) method. The NPEB method performs better than Tang et al.’s method in terms of MSE across the range of parameters in the multidimensional grid described in Table 1. Different values of θ are plotted using different shapes, and different values of m are plotted using different colors (large values are in red). In the dashed line we plot $y=x.$