1. Department of Sociology and Institute for Ethnic Studies, University of Nebraska–Lincoln, NE, USA
2. Department of Policy Analysis and Management, Cornell University, Ithaca, NY, USA
3. Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA
4. Institute of European and American Studies, Academia Sinica, Taipei
5. School of Information, University of Michigan-Ann Arbor, MI, USA