Unconditional inferences for binary outcomes:(w1, w2, w3, w4) = (0.242, 0.045, 0.526, 0.187)′ and π = 1/3. (τ11, τ12, τ13, τ14) = (0.717, 0.900, 0.602, 0.750) and (τ21, τ22, τ23, τ24) = (0.615, 0.750, 0.815, 0.880). Bias stands for the empirical bias. ESE stands for the empirical standard errors. CP1 and CP2 stand for the empirical coverage levels of upper and lower 97.5% confidence intervals, respectively. is the empirical probability that the absolute bias is greater than one third of the standard error of the naive estimator