@article{visibilitygraphanalysisofeconomypolicy,
  title = {Visibility graph analysis of economy policy uncertainty indices},
  author = {Peng-Fei Dai and Xiong Xiong and Wei-Xing Zhou},
  year = {2020},
  eprint = {2007.12880},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2007.12880v1},
}