Data Quality Assessment and Harmonisation of Loneliness Measures in European Survey Data: Preregistration of the analyses for LONELY-EU Deliverable 3.2

Preregistration of the analyses for Deliverable 3.2 of LONELY-EU (Horizon Europe, Grant Agreement 101177225), University of Milan: data quality assessment and harmonisation of loneliness measures in European survey data. This record holds the protocol with its appendices; the report and its aggregate results will be added as new versions. Preregistration on OSF: https://doi.org/10.17605/OSF.IO/NK2ZX. Code: https://github.com/arturobertero/LONELY-EU_D3.2, every release archived on Zenodo with its own DOI. No microdata of the 20 surveys, raw or cleaned, are deposited here. Each producer licenses its data to named researchers; Appendix A of the protocol says where to apply. Licence: documents CC BY 4.0; code MIT.