Table 2: Empirical likelihood confidence interval estimates for heart transplant data. Nominal level = 95%.

ModelParameter estimates Confidence intervals
Parameter BJ KSVELEE ELSD

(I) −0.593 0.258 (−2.740, 0.645) (−0.596, 0.928)
(II) −0.028 0.055 (−0.065, 0.032) (0.001, 0.128)

Note: BJ refers to the Buckley-James [3] estimate, and KSV refers to the synthetic data estimate of Koul et al. [11]. ELEE is the proposed empirical likelihood method based on the Buckley-James estimating equation, and ELSD is the empirical likelihood method based on synthetic data [15, 16].