Cheng, Xu; Sánchez-Becerra, Alejandro; Shephard, Andrew - 2023 - This Version: June 25, 2023
. This paper introduces a new weighting scheme that combines cross-fitting and regularized weighting matrix estimation. We … also provide a new cross-fitting standard error, applying cross-fitting to estimate the asymptotic variance. In a many …-moment asymptotic framework, we demonstrate the effectiveness of cross-fitting in eliminating a first-order asymptotic bias due to …