LONELY-EU uses a multi-method, cross-national approach to understand and address social isolation and loneliness (SIL) across Europe. The project combines large-scale survey research, experimental studies, and expert consultation to uncover the causes, consequences, and solutions for SIL.

1. Identifying who is at risk
   LONELY-EU aims to build a detailed picture of the predictors of loneliness — examining how demographic, social, and psychological factors interact to determine who is most at risk. This work will lead to the creation of a decision-support tool that helps policymakers and practitioners identify vulnerable groups across Europe. (Lead: Prof Maike Luhmann, Ruhr University Bochum)
   
   
2. Understanding the consequences
   A second research stream focuses on the outcomes of social isolation and loneliness, exploring their effects on well-being, health, and social participation. By integrating cross-country data, the project provides a comprehensive overview of how loneliness impacts individuals and communities across Europe. (Lead: Prof. Katarzyna Growiec, SWPS University)
   
   
3. Modeling cause and effect
   To move beyond correlations, the project uses experimental and longitudinal methods to examine causal relationships — identifying what drives loneliness and how interventions can make a difference. (Lead: Prof Patrizia Catellani, Università Cattolica del Sacro Cuore – Milan)
   
   
4. Developing a European monitoring framework
   LONELY-EU is also designing a monitoring framework to track SIL across the EU. Through a systematic review and expert consultations with stakeholders from EU and affiliated countries, the project establishes shared indicators and tools for ongoing assessment (Leads: Dr Hans Rocha IJzerman, Annecy Behavioral Science Lab & University of Oxford; Prof Cristiano Vezzoni, Università degli Studi di Milano Statale)
   
   

All of this work is guided by open-science principles — emphasizing transparency, data sharing, and collaboration among scientific, policy, and communication experts. The E2A Board connects this research to real-world policymaking, ensuring that evidence translates into tangible strategies for reducing loneliness and social isolation.

The Findings section will grow into a living library of EU-wide evidence on the causes, impacts, and interventions for SIL, featuring key data visualizations and links to published results.