Study Veenhoven (2005c): study ZZ 1973
- Public
 - Adults, general public, EU 8 member states, USA and Japan, 1973-2002
 - Sample
 - Respondents
 - N = 300000
 - Non Response
 - Assessment
 - Interview: face-to-face
 
Correlate
- Authors's Label
 - Trend Happy Life Years 1973-2002
 - Our Classification
 - 
            
 - 
                        
 - Remarks
 - Data: World Database of Happiness, Collection Happiness in Nations
 - Operationalization
 - Yearly change 1973-2002
 
Observed Relation with Happiness
B CI95
B is average yearly change in happy life years years