TREE follows the educational and employment trajectories of two nationally representative cohorts of compulsory school leavers in Switzerland from adolescence into adulthood. The first TREE cohort (TREE1) comprises over 6,300 individuals who left compulsory school in 2000. The second TREE cohort (TREE2) comprises over 8,400 individuals who left compulsory school in 2016. In 2022, 3,500 additional individuals who left compulsory school in 2016 were recruited into TREE2. Participants from both cohorts were first surveyed at the end of compulsory school at the age of approximately 15 to 16 years, and are followed up yearly until age 22-23, and subsequently every two to five years.
Study design
Cohort - accelerated
Number of participants at first data collection
6,343 (TREE1)
8,429 (TREE2)
Age at first data collection
15 - 16 years (TREE1)
15 - 16 years (TREE2)
Participant year of birth
Varied (TREE1)
Varied (TREE2)
Participant sex
All
Representative sample at baseline?
The population of Switzerland.
Sample features
Country
Year of first data collection
2000 (TREE1)
2016 (TREE2)
Primary Institutions
University of Bern (Universität Bern)
Profile paper DOI
Funders
Swiss National Science Foundation (SNSF)
Ongoing?
Yes
Data types collected


Engagement
Keywords
Consortia and dataset groups