FIG. 2.

Plots of the standard errors under the models M1, M2, M5 and M6, based on n = 500, h = 0.1. The solid lines are the averages of the estimates of the standard deviations of β̂(υ), $\widehat{\text{VE}}(\upsilon )\text{and}\widehat{\text{CV}}(\upsilon )$, while the dashed lines are the sample standard deviations of β̂(υ), $\widehat{\text{VE}}(\upsilon )\text{and}\widehat{\text{CV}}(\upsilon )$, based on 1000 repetitions. The gray lines are the corresponding estimates for the standard deviations of β̂(υ), $\widehat{\text{VE}}(\upsilon )\text{and}\widehat{\text{CV}}(\upsilon )$ of 50 random samples.