Study Blaauw & Pretorius (2013): study ZA 2008
- Public
 - 20+ aged general public, South Africa, 2008
 - Survey name
 - SA-NIDS Panel study
 - Sample
 - Respondents
 - N = 13792
 - Non Response
 - Assessment
 - Interview: face-to-face
 
Correlate
- Authors's Label
 - Regional Income per capita
 - Our Classification
 - 
            
 - 
                        
 - Distribution
 - a:M=6,46 SD=1,15 1=12,20% 2=6,55% 3=19,77% 4=25,90% 5=8,87% 6=7,22% 7=6,47% 8=8,85% 9=13,16%
 - Operationalization
 - Logarithmic household per capita income
a: Eastern Cape
b: Free State
c: Gauteng
d: KwaZulu-Natal
e: Limpopo
f: Mpumalanga
g: Northern Cape
h: North West
i: Western Cape 
Observed Relation with Happiness
All b's controlled for:
- Personal characteristics:
- Ethnicity
- Gender
- Marital status
- Having children
- Education
- Religion important
- Regional characteristics:
- Urban-rural