The HEalth, Aging and Retirement Transitions in Sweden (HEARTS) study is a longitudinal research project targeting the transition from work to retirement. The project was initiated in 2015 and includes 5913 individuals born between 1949 and 1955. The overall aim of HEARTS is to improve our understanding of the retirement process and the factors contributing to continuity and change in psychological health in the years before and following retirement. We invite and encourage collaborations. Read more on how to initiate a collaboration and access to our data below. Project homepage: https://www.gu.se/en/research/hearts Contact: hearts@psy.gu.se More details on study design, data collection, measures, publications, and collaborations can be found in the following documents: • HEARTS-1-General info: Details on study design, data collection, and participants • HEARTS-2-1-Survey-Construct-tree: Overview of survey domains and measures • HEARTS-2-2-Registry data: Overview of available registry data from Statistics Sweden • HEARTS-3-Overview of publications and used constructs: Details on publications and data usage • HEARTS-4-CollaborationAndDataUse: Information on how to collaborate and get access to data