Study Margolis & Myrskyla (2011): study ZZ World samples 1981
- Public
 - 15+ aged general public in 86 nations 1981-2005
 - Survey name
 - INT-World Values Survey, pooled waves
 - Sample
 - Respondents
 - N = 201988
 - Non Response
 - Assessment
 - Interview: face-to-face
 
Correlate
- Authors's Label
 - Age
 - Our Classification
 - 
            
 - 
                        
 - Operationalization
 - 0 15-19 aged (reference)
1a 20-39
1b 40+ 
Observed Relation with Happiness
b controlled for:
- number of children
- gender
- country
- year
b additionally controlled for:
- income
- socioeconomic status
- marital status