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 (HLY)
- Our Classification
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- Operationalization