Figure 1.

Simulation results of point estimates (top panels) and coverage rates (bottom panels): the subscripts “a,” “b,” “c,” and “d” stand for methods “reg,” “IPW,” “AIPW,” and “mat,” respectively, “reg2” is ${\widehat{\tau }}_{\text{reg},2}$ “reg2,method” is ${\widehat{\tau }}_{\text{reg},2\&\text{method}}$, other notation is defined similarly, and “mi” is ${\widehat{\tau }}_{\text{mi}}$