Study Diener et al. (2012a): study ZZ World samples 2005

Public:

15+ aged general public, 135 nation followed at least 3 years, 2005-2011

Survey name:

Gallup World Poll combined waves

Sample:

Respondents:

N = 806526

Non Response:

Assessment:

Multiple methods
telephone interviews in developed nations, face-toface in most developing nations

Correlate

Authors's label

GDP/capita

Our Classification

Operationalization

Real gdp/capita at purchsing power (international dollars)

Observed Relation with Happiness