مؤلف: Eric D. Widmer

Vida Česnuitytė is Lecturer of Sociology and Social Policy and Head of the Sociological Research Laboratory at Mykolas Romeris University, Vilnius, Lithuania. Detlev Lück is Senior Researcher at the Federal Institute for Population Research (Bi B), Wiesbaden, Germany. Eric D. Widmer is Professor of Family Sociology at the Department of Sociology, University of Geneva, Switzerland.