Study Safi (2010): study ZZ Western Europe 2002
- Public
 - 15+ aged, general public, 12 European nations 2002-2006
 - Sample
 - Respondents
 - N = 60169
 - Non Response
 - Assessment
 - Interview: face-to-face
 
Correlate
- Authors's Label
 - gender
 - Our Classification
 - 
            
 - 
                        
 - Operationalization
 - 1 male reference
0 female 
Observed Relation with Happiness
- Age
- education
- family life
- income
- occupation
- employment
- physical health