Fig. 2.

Simulation results. (A) Estimates of regression coefficients in the simple MK regression. The true coefficients are ${\beta }_1=1$ and ${\beta }_2=0$. (B) Estimates of regression coefficients in the multiple MK regression. The true coefficients are ${\beta }_1=1$ and ${\beta }_2=0$. (C) Estimates of regression coefficients in the simple MK regression. The true coefficients are ${\beta }_1=1$ and ${\beta }_2=-0.2$. (D) Estimates of regression coefficients in the multiple MK regression. The true coefficients are ${\beta }_1=1$ and ${\beta }_2=-0.2$. In each plot, dots and error bars indicate the means and the 2-fold standard deviations of estimated coefficients across 10 independent replicates, respectively.