@article{testabilityofinstrumentalvariablesin,
  title = {Testability of Instrumental Variables in Additive Nonlinear, Non-Constant Effects Models},
  author = {Xichen Guo and Zheng Li and Biwei Huang and Yan Zeng and Zhi Geng and Feng Xie},
  year = {2024},
  eprint = {2411.12184},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2411.12184v1},
}