Early pandemic COVID-19 case growth rates increase with city size

• https://www.nature.com/articles/s42949-021-00030-0
  • https://arxiv.org/abs/2003.10376
• Andrew J. Stier, Marc G. Berman, Luis M. A. Bettencourt

Impact of network structure on contagion at the level of cities. See Friendship paradox for the basic mechanism.