@article{51396,
  author = {Xi Song and Catherine Massey and Karen Rolf and Joseph Ferrie and Jonathan Rothbaum and Yu Xie},
  title = {Long-term decline in intergenerational mobility in the United States since the 1850s},
  year = {2020},
  journal = {Proceedings of the National Academy of Sciences},
  volume = {117},
  pages = {251-258},
  url = {https://www.pnas.org/doi/10.1073/pnas.1905094116},
}