@misc{shao2021does,
  title={How does economic policy uncertainty comove with stock markets: New evidence from symmetric thermal optimal path method},
  author={Ying-Hui Shao and Yan-Hong Yang and Wei-Xing Zhou},
  year={2021},
  eprint={2106.04421},
  archivePrefix={arXiv},
  primaryClass={q-fin.GN},
  doi={10.1016/j.physa.2022.127745},
  url={https://arxiv.org/abs/2106.04421}
}