Calonico S, Cattaneo MD, Farrell MH. nprobust: Nonparametric Kernel-Based Estimation and Robust Bias-Corrected Inference. J. Stat. Soft. [Internet]. 2019 Oct. 31 [cited 2024 Apr. 26];91(8):1-33. Available from: https://www.jstatsoft.org/index.php/jss/article/view/v091i08