To determine the bandwidth we selected the strategy suggested by Wand and Jones(1995), beginning with a large bandwidth and decreasing the amount of smoothing until fluctuations in the estimated distribution mode become more‘‘random’’than‘‘structural’’.
To determine the bandwidthwe selected the strategy suggested by Wand and Jones(1995),beginning with a large bandwidth and decreasing the amount ofsmoothing until fluctuations in the estimated distribution modebecome more‘‘random’’than‘‘structural’’.