Figure A2:

Efficiency of Root 1 for both cases, for a variety of classic designs. For each case, ${\sigma }_t^2=5$ and ${\tau }_t^2=0.1$. To keep the ACC consistent, we chose ${\eta }_t^2=0.1$ and ${\gamma }_t^2=0.05$ for the time-fitted random treatment and treatment-fitted random time cases, respectively.