@article{pairwisevalidinstruments,
  title = {Pairwise Valid Instruments},
  author = {Zhenting Sun and Kaspar Wüthrich},
  year = {2022},
  eprint = {2203.08050},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2203.08050v5},
}