Correlational finding on Happiness and Personal income
Subject code: I01ab01

StudyKollamparambil (2019): study ZA 2008
TitleHappiness, Happiness Inequality and Income Dynamics in South Africa.
SourceJournal of Happiness Studies, 2019, online
URLhttps://doi.org/10.1007/s10902-019-00075-0
Public18+ aged, adults, South Afrika, 2008-2014
SampleProbability sample (unspecified)
Non-Response
Respondents N =112000

Correlate
Author's labelLog individual income
Page in Source Table 2,4
Our classificationPersonal income, code I01ab01
Operationalization
A Log individual income
B Log individual income squared

Observed Relation with Happiness
Happiness
Measure
StatisticsElaboration/Remarks
O-SLu-c-sq-n-10-db-fix=+.09 p < .01
A
D-LS-c-sq-n--ab-rif=-.17 p < .01
A
O-SLu-c-sq-n-10-db-fix=+.00 ns
B
D-LS-c-sq-n--ab-rif=+.22 p < .001
B

b-fix's and b-rif's controlled for:
- relatively rich
- age and age squared
- employed
- female
- in a relationship
- above matric education
- healthy
- credit access
- urban
- flushing toilet
- electricity
- black
- religious

b-fix's not significantly affected by additonal 
control for:
- domestic violence
- experienced crime
D-LS-c-sq-n--ab-rif=-.21 p < .001
A

b-rif additionally controlled for:
- log individual income squared


Appendix 1: Happiness measures used
CodeFull Text
D-LS-c-sq-n--aStandard deviation of 0-10 score on single question "overall, how happy would you say you are currently?"
O-SLu-c-sq-n-10-dSelfreport on single question:

What is your current level of life satisfaction between one and 10?
1
2
3
4
5
6
7
8
9
10
Scale labels not reported


Appendix 2: Statistics used
SymbolExplanation
b-fixREGRESSION COEFICIENT in fixed effects analysis
Type: test statistic
WDH symbol: b-fix
Primary correlate level: metric
Secondary correlate level: nonmetric
Happiness level: metric
Theoretical range: unlimited
Meaning:
Variant of usual (non-standardized) regression coefficient (b), which controls for the secondary variables, by focusing on differences from a fixed level, such as the mean in a category. Aims to reduce the residual variance and to improve the precision of the regression coefficient.

References:
Wikipedia: http://en.wikipedia.org/wiki/Fixed_effects_model
Non-technical text: http://www.jblumenstock.com/files/courses/econ174/FEModels.pdf
b-rifLeast square regression coefficient in RIF-regression, where the dependent variable is th influence on a distributionakl statistic (f.e. variance, GINI)
Source:
Ruut Veenhoven, World Database of Happiness, Collection of Correlational Findings, Erasmus University Rotterdam.
https://worlddatabaseofhappiness.eur.nl