Study Downie et al. (2007): study ZZ World samples 1995

Public

Adults, general public, 90 nations 1995-2005

Survey name

Pooled surveys

Sample

Respondents

N = 100000

Non Response

Assessment

Multiple assesment methods

Correlate

Authors's Label

GDP

Our Classification

Remarks

Source: World Bank (2006)

Distribution

M=2,3 x 10^11  SD=1,0 x 10^12

Operationalization

Observed Relation with Happiness