@article{whotrainsmattersfederatedlearningunderen,
  title = {Who Trains Matters: Federated Learning under Enrollment and Participation Selection Biases},
  author = {Gota Morishita},
  year = {2026},
  eprint = {2604.26604},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2604.26604},
}