Since the year 2003, SOEP has been systematically adding to its repertoire of survey instruments in the area of early childhood. The present study reports on the instrumental value of a 20-item "mother questionnaire" on the adaptive behavior of their two to three-year-old children (VABS) in the...

Long-term contracts are an important element of all economic activity and, thus, critical for understanding modern economic structures. The natural gas industry provides particular insights into the functioning and dynamics of long-term contracts and industry structures, in a sector that is...