Study Veenhoven (2001): study ZZ 1990
- Public:
- Adults, general public, 41 nations, 1990
- Sample:
- Respondents:
- N = 50000
- Non Response:
- Assessment:
- Interview: face-to-face
Correlate
- Authors's label
- Real income per capita
- Our Classification
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- Operationalization
- Purchasing power parities