Study Ouweneel (2000): study ZZ 1980
- Public
 - Adults, general public, 15 nations 1980, 39 nations 1990
 - Sample
 - Respondents
 - N = 50000
 - Non Response
 - n.a.
 - Assessment
 - 
        Interview: face-to-face                    
Most studies used face-to-face interviews 
Correlate
- Authors's Label
 - Size of welfare state
 - Our Classification
 - 
            
 - 
                        
 - Operationalization
 - Social security expenditure in % GNP per capita
 
Observed Relation with Happiness
rpc's controlled for Real GDP