@article{JMLR:v22:21-0383,
  author  = {Chengchun Shi and Shikai Luo and Hongtu Zhu and Rui Song},
  title   = {An Online Sequential Test for Qualitative Treatment Effects},
  journal = {Journal of Machine Learning Research},
  year    = {2021},
  volume  = {22},
  number  = {286},
  pages   = {1--51},
  url     = {http://jmlr.org/papers/v22/21-0383.html}
}