Foreword: Framing the vertical of this Special Issue
Antonia Milbert,
André Mueller
Affiliations
Antonia Milbert
Federal Institute for Research on Building, Urban Affairs and Spatial Development (BBSR), Federal Office for Building and Regional Planning (BBR), Division People and Regions in Transition – Subjective and Objective Indicators, Germany
André Mueller
Federal Institute for Research on Building, Urban Affairs and Spatial Development (BBSR), Federal Office for Building and Regional Planning (BBR), Division European (and International) Spatial and Urban Development, Deichmanns Aue 31–37, 53179 Bonn, Germany / University of Bonn, Faculty of Mathematics and Natural Sciences, Department of Geography, Meckenheimer Allee 166, 53115 Bonn, Germany