Dr. Barbara Müller Scientific collaborator, Survey Management / TREE study Institute of Sociology Phone +41 31 684 32 35 Phone2 +41 31 684 48 17 E-Mail barbara.mueller@unibe.ch Office A 220 Postal Address University Bern Institute of Sociology Fabrikstrasse 8 3012 Bern Switzerland private website www.tree.unibe.ch/