We propose a computationally efficient approximation for the double bootstrap bias adjustment factor without using the inner bootstrap loop. The approximation converges in probability to the population bias correction factor. We study the finite sample properties of the approximation in the context of a linear instrumental variable model. In identified versions of the model considered in our Mo...

The bootstrap is a popular and powerful method for assessing precision of estimators and inferential methods. However, for massive datasets which are increasingly prevalent, the bootstrap becomes prohibitively costly in computation and its feasibility is questionable even with modern parallel computing platforms. Recently Kleiner, Talwalkar, Sarkar, and Jordan (2014) proposed a method called BL...

5-survival (5YS) and life span after radical surgery for non-small cell lung cancer (LC) patients (LCP) (T1–4N0–2M0) was analyzed. We analyzed data of 771 consecutive LCP (age = 57.6 ± 8.3 years) radically operated monitored in 1985–2022 (m 662, f 109; lobectomies 516, pneumonectomies 255; combined procedures 194; only surgery-S 620, adjuvant chemoimmunoradiotherapy-AT 151: CAV/gemcitabine+cisp...