Table 2.

Simulation Results under Heckman-Ideal Scenarios (β₁ = β₂ = 1)

Scenario 1	β1				β2
Default	Estimate	SESim	${\widehat{SE}}_{\mathrm{HW}}$	CP	Estimate	SESim	${\widehat{SE}}_{\mathrm{HW}}$	CP
Ignore	0.81	0.046	0.046	0.02	0.98	0.046	0.045	0.91
Exclude	0.90	0.069	0.069	0.66	0.99	0.066	0.064	0.94
Adjust	0.89	0.049	0.049	0.41	0.99	0.046	0.045	0.94
Censored Normal	1.53	0.064	0.06	0.00	1.07	0.060	0.062	0.81
IPTW	0.88	0.061	0.059	0.49	0.99	0.051	0.050	0.93
Heckman	1.00	0.068	0.068	0.95	1.00	0.046	0.046	0.95