Like many medical studies, the Berlin Aging Study II (BASE-II) is based on a non-random convenience sample of self-recruited participants. To study processes of selectivity in BASE-II, we used an identical questionnaire to compare BASE-II with a large, representative reference study, the German...

The Berlin Aging Study II (BASE-II) is a multidisciplinary study that allows for the investigation of how a multitude of health status factors as well as many other social and economic outcomes interplay. The sample consists of 1,600 participants aged 60 to 80, and 600 participants aged 20 to...

The paper gives an overview of two experiments implemented in the German Socio-Economic Panel (SOEP) considering the effect of monetary incentives on cross-sectional and longitudinal response propensities. We conclude that the overall effects of monetary incentives on response rates are positive...

In survey research, a consensus has grown regarding the effectiveness of incentives encouraging survey participation across different survey modes and target populations. Most of this research has been based on surveys from the United States, whereas few studies have provided evidence that these...

The Berlin Aging Study II (BASE-II) is a multidisciplinary study that allows for the investigation of how a multitude of health status factors as well as many other social and economic outcomes interplay. The sample consists of 1,600 participants aged 60 to 80, and 600 participants aged 20 to...

Die Menschen in Deutschland sind heute im Durchschnitt zufriedener als zu jedem anderen Zeitpunkt nach der Wiedervereinigung. In Ostdeutschland liegt das Niveau der Zufriedenheit jedoch auch mehr als 20 Jahre nach der Wiederbereinigung noch unter dem westdeutschen Niveau. Das zeigen die...

Im Januar des Jahres 2008 begann die Feldarbeit der 25. Welle des SOEP. Im Jahr 2009 werden damit etwa 2 500 anonymisierte Datensätze von Personen zur Auswertung zur Verfügung stehen, die seit 1984 ununterbrochen an 25 Befragungen in den westdeutschen SOEP-Teilstichproben A und B teilgenommen...

Background. Excessive loss of muscle mass in advanced age is a major risk factor for decreased physical ability and falls. Physical activity and exercise training are typically recommended to maintain muscle mass and prevent weakness. How exercise in different stages of life relates to muscle...

Verschiedene repräsentative Erhebungen und methodische Ansätze zeigen, dass gegenwärtig das Thema 'Fluchtzuwanderung' ganz weit oben auf der Liste der politischen Themen steht. Gleichzeitig ist die Bedeutung der Kategorie 'Gerechtigkeit' zurückgegangen. Offenbar verbinden viele Menschen das...