@article{efficientsubgroupanalysisviaoptimaltrees,
  title = {Efficient Subgroup Analysis via Optimal Trees with Global Parameter Fusion},
  author = {Zhongming Xie and Joseph Giorgio and Jingshen Wang},
  year = {2026},
  eprint = {2602.04077},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2602.04077},
}