Correlational finding on Happiness and subject: disposable income

StudyAkay (2012): study DE 1985
TitleHappy Taxpayers? Income Taxation and Well-Being.
SourceDiscussion Paper, 2012, Nr. 6999, Institute for the Study of Labor (IZA), Bonn
URLhttp://hdl.handle.net/10419/67179
Public16-65 aged, taxpayers, Germany, 1985-2010
SampleProbability stratified sample
Non-Response
Respondents N =188412

Correlate
Author's labelDisposable income
Page in Source 8,11,29
Our classificationdisposable income
Operationalization
Log disposable income. 
Disposable income= net household income + government 
transfers (benefits)
Remarks
Details not reported

Observed Relation with Happiness
Happiness
Measure
StatisticsElaboration/Remarks
O-SLW-c-sq-n-11-db=+.24 p < .01
b controlled for:
- net taxation

When instead b is controlled for log net taxation 
b=+.246 (01)


Appendix 1: Happiness measures used
CodeFull Text
O-SLW-c-sq-n-11-dSelfreport on single question:

Taking all things together, how satisfied are you with your life these days? Please answer with the help of this scale. For instance, when you are totally satisfied with your life, please tick '10'. When you are totally unsatisfied with your life, please tick '0'. You may use all values in between to indicate that you are neither totally satisfied nor totally unsatisfied."
10 totally satisfied
9
8
7
6
5
4
3
2
1
0 totally unsatisfied


Appendix 2: Statistics used
SymbolExplanation
bREGRESSION COEFFICIENT (non-standardized) by LEAST SQUARES (OLS)
Type: test statistic
Measurement level: Correlate: metric, Happiness: metric
Theoretical range: unlimited

Meaning:
b > 0 A higher correlate level corresponds with a higher happiness rating on average.
B < 0 A higher correlate level corresponds with a lower happiness rating on average.
B = 0 Not any correlation with the relevant correlate.
Source:
Ruut Veenhoven, World Database of Happiness, Collection of Correlational Findings, Erasmus University Rotterdam.
https://worlddatabaseofhappiness.eur.nl