Study Ball & Chernova (2008): study ZZ 1995 /1
- Public
 - 18+ aged, general public, 18 nations, 1995-1997
 - Sample
 - Respondents
 - N = 20771
 - Non Response
 - Assessment
 - Interview: face-to-face
 
Correlate
- Authors's Label
 - Employment
 - Our Classification
 - 
            
 - 
                        
 - Related specification variables
 - 
                
 - 
                            
 - Operationalization
 - a part time
b self employed
c retired
d housewife
e unemployed
f student
g employed (reference category) 
Observed Relation with Happiness
Betas controlled for:
-Interaction between relative and absolute income
-Individual variables
-Income
-Marital status
-Gender
-Age
-Children
-Health
-Religion
-Country (dummies)
No difference if controlled for country variables instead of dummies.