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Correlational findings

Study Easterlin & Angelescu McVey (2009): study ZZ World samples 1981

Public:
18+ aged, general public, World samples, 1981-2004
Survey name:
WVS: combined waves
Sample:
Respondents:
N = 195
Non Response:
Assessment:
Interview: face-to-face

Correlate

Authors's label
Per capita GDP
Our Classification
Operationalization
Gross domestic product per capita (absolute scale).

Observed Relation with Happiness

Happiness Measure Statistics Elaboration / Remarks O-SLW-c-sq-n-10-a Ra² = .45 The relation is curvilinear, diminishing returns, see Fig.1.

When log GDP is used instead of GDP the result is a linear relationship:
Each doubling of GDP is associated with a  constant increase in life satisfaction.