lpdensity: Local Polynomial Density Estimation and Inference. - Matias D. Cattaneo; Michael Jansson; Xinwei Ma (J. Stat. Softw., 2022)

lpcde: Estimation and Inference for Local Polynomial Conditional Density Estimators. - Matias D. Cattaneo; Rajita Chandak; Michael Jansson; Xinwei Ma (J. Open Source Softw., 2025)