Daniel Baldwin Hess is a Professor and Chairperson of the Department of Urban and Regional Planning in the School of Architecture and Planning at the University at Buffalo, State University of New York. He is a former Visiting Scholar and Director of the Centre for Migration and Urban Studies at the University of Tartu, Estonia, where he was a Marie Sklodowska-Curie International Fellow funded by the European Commission. His research develops new pathways for understanding the complex socio-economic and ethnic landscapes of cities and related spatial inequalities. He is co-editor of the journal Town Planning Review (Liverpool University Press) and co-editor of the book Housing Estates in Europe: Poverty, Ethnic Segregation, and Policy Challenges (Springer Publishing 2018). Tiit Tammaru is a Professor at the Centre for Migration and Studies at the University of Tartu, Estonia. Tammaru is also the Head of the Centre for Estonian Diaspora Studies and has received both the Estonian Science Award in the Social Sciences (2010) and the Natural Sciences Award (2011). His fields of interest include socio-spatial inequalities, geographical changes in urban regions, governing urban diversity, and social mobility.