@article{specificationtestingwithgroupedfixed,
  title = {Specification testing with grouped fixed effects},
  author = {Claudia Pigini and Alessandro Pionati and Francesco Valentini},
  year = {2023},
  eprint = {2310.01950},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2310.01950v1},
}