Correlational findings

Study Ng et al. (2009): study ZZ World samples 2005

15+ aged, general public, 121 nations, 2005-2006
Survey name
N = 125077
Non Response
Interview: Computer Assisted Telephone Interview (CATI)
In wealty nations through telephone surveys based on random-digit dialing. In poorer nations door-to-door interviews, randomly-selected.


Authors's Label
Rich countries ( vs poor)
Our Classification
Wealth of nation is measured by the survey itself and an independent source. The per capita GDP (Purchasing Power Parity) data of each nation was obtained from the World Bank.
Index of:
A: average household income of all respondents within the same nation.
B: The GDP ( Purchasing Power Parity) data of each nation, obtained from the World Bank.
C: Percentage of people in a nation who possesses modern conviences.
D: Percentage of people in a nation who could not meet their basic needs.
E: Life expectancy at birth.

Splitt up into
1 poor nations
2 rich nations

Observed Relation with Happiness

Happiness Measure Statistics Elaboration / Remarks C-BW-c-sq-l-11-c DM = + AVERAGE happiness by AVERAGE standard of living in 121 nations

Rich countries M = 6.71
Poor countries M = 4.64
- difference=     +2.07
C-BW-c-sq-l-11-c DM = +