Study Bradburn (1969): study US 1963
- Public
 - 21-60 aged, urban areas, USA, 1963 - 64
 - Sample
 - Respondents
 - N = 2787
 - Non Response
 - ± 20%, Attrition ± 30%
 - Assessment
 - 
        Interview: face-to-face                    
Repeated interviews at home using highly structured questionnaires 
Correlate
- Authors's Label
 - White race
 - Our Classification
 - 
            
 - 
                        
 - Remarks
 - Data T1.
 - Operationalization
 - 0 Negro
1 White 
Observed Relation with Happiness
Unaffected by educational level.
Stronger at lower income levels, especially among those of high education.