1. Beyond the Hedonic Treadmill -Revising the Adaption Theory of Well-Being;Ed Diener;American Psychologist,2006
2. The Cross-National Equivalent File (CNEF) and its Member Country Household Panel Studies;Joachim R Frick;Schmollers Jahrbuch,2007
3. The First Six Waves of SOEP - The Panel Project in the Years 1983 to 1989
4. Life Goals Matter to Happiness: A Revision of Set-Point Theory;Bruce Headey;Social Indicators Research,2008