Which log level should developers choose for a new logging statement?

Heng Li, Weiyi Shang, Ahmed E. Hassan. Which log level should developers choose for a new logging statement?. Empirical Software Engineering, 22(4):1684-1716, 2017. [doi]

@article{LiSH17-5,
  title = {Which log level should developers choose for a new logging statement?},
  author = {Heng Li and Weiyi Shang and Ahmed E. Hassan},
  year = {2017},
  doi = {10.1007/s10664-016-9456-2},
  url = {https://doi.org/10.1007/s10664-016-9456-2},
  researchr = {https://researchr.org/publication/LiSH17-5},
  cites = {0},
  citedby = {0},
  journal = {Empirical Software Engineering},
  volume = {22},
  number = {4},
  pages = {1684-1716},
}