Study Vendrik & Woltjer (2007): study DE 1984
- Public
 - 18+ aged general public, Germany, followed 17 years, 1984-2001
 - Survey name
 - DE-SOEP combined waves
 - Sample
 - Respondents
 - N = 102068
 - Non Response
 - Assessment
 - Interview: face-to-face
 
Correlate
- Authors's Label
 - Age children in household
 - Our Classification
 - 
            
 - 
                        
 - Operationalization
 - a) Couple with children below 17
b) Couple with children above 16
c) Couple with children below 17 and children above 16
1 if yes, 0 if no 
Observed Relation with Happiness
b's controlled for:
- Household income
- Reference household income
- Unemployment status
- Years of education
- Age
- Weekly hours worked