1. Department of Global Health, Boston University, Boston, MA, USA
2. Department of Sociology, Washington University, St. Louis, MO, USA
3. Department of Sociology, University of Washington, Seattle, WA, USA
4. Department of Statistics, University of Washington, Seattle, WA, USA
5. Information School, University of Washington, Seattle, WA, USA
6. Max Planck Institute for Demographic Research, Rostock, Germany