@article{Pfitzinger2024,
  author    = {Johann Pfitzinger},
  title     = {Cluster regularization via a hierarchical feature regression},
  journal   = {Econometrics and statistics},
  volume    = {2024},
  number    = {In Press, Corrected Proof},
  doi       = {10.1016/j.ecosta.2024.01.003},
  year      = {2024},
}