Changxin Yang Zhongyi Zhu Hongmei Lin Zengyan Fan Heng Lian Distributed iterative hard thresholding for variable selection in Tobit models. 108227 2025 211 Comput. Stat. Data Anal. https://doi.org/10.1016/j.csda.2025.108227 db/journals/csda/csda211.html#YangZLFL25 streams/journals/csda