Typically, laboratory experiments suffer from homogeneous subject pools and self-selection biases. The usefulness of survey data is limited by measurement error and by the questionability of their behavioural relevance. Here we present a method integrating interactive experiments and...

Today, Germany's citizens are happier on average than at any other point in time since reunification. Even though more than 20 years have passed, the average level of happiness in eastern Germany is still significantly lower than that in western Germany. This is demonstrated by the most recent...

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...

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...

Über die Nutzung von PC und Internet gibt es zwar eine ganze Reihe von aktuellen Umfragen; diese Erhebungen erlauben jedoch zumeist keine tief gegliederten Analysen zu den sozio-ökonomischen Determinanten der Nutzung dieser neuen Technologien. Mit dem vom DIW Berlin erhobenen...

Personalcomputer (PC) und das Internet werden in Deutschland - in West wie in Ost - von allen Bevölkerungsschichten intensiv genutzt, aber es gibt nach wie vor bemerkenswerte Unterschiede. Wohlhabende Haushalte sind überdurchschnittlich oft mit einem PC ausgestattet; dies gilt generell auch...