Correlational finding on Happiness and Current age (in years)
Subject code: A04ab

StudyVanSluijs (2004): study NL 1987
TitleEffecten van Levenslooptransities op de Tevredenheid van Jong Volwassenen. (Effects of Lifecourse Transition on Satisfaction of Adolescents).
SourceMaster thesis, University Tilburg, 2004, Netherlands
URLhttp://worlddatabaseofhappiness.eur.nl/hap_bib/freetexts/vansluijs_J_2004.pdf
PublicYoung adults, followed from age 18 to 30, The Netherlands, 1987-1999
SampleProbability stratified sample
Non-Response36,6% (baseline)
Respondents N =836

Correlate
Author's labelAge
Page in Source 44, 62,63
Our classificationCurrent age (in years), code A04ab
Operationalization
Years above age 18
Remarks
Situation assessed at:
T1: 1987 when aged 18 to 26
T2: 1989 when aged 20 to 28
T3: 1991 when aged 22 to 30
T4: 1995 when aged 26 to 34
T5: 1999 when aged 30 to 34

Observed Relation with Happiness
Happiness
Measure
StatisticsElaboration/Remarks
O-Sum-cy-mq-v-7-ab=
B's indicate average difference between age 
categories over this 12 year period
O-Sum-cy-mq-v-7-ab=+.06 p < .001
Effect a little stronger for women.
O-Sum-cy-mq-v-7-ab=+.07 p < .001
B controlled for personal characteristics:
- age squared
- gender 
- education
- cohort 1965 (vs cohort 1961)
- cohort 1969 (vs cohort 1961)
- mental health
- neuroticism
- extraversion
O-Sum-cy-mq-v-7-ab=+.02 ns
additional control for life course transitions 
(happened or not):
- first job
- no job
- left parental home
- living together/marriage first partner
- divorce from first partner
- living together/marriage second partner
- having first child

Gender difference disappears when the above 
transition variables are controled
O-Sum-cy-mq-v-7-ab=+.02 ns
additional control for years since transition:
- first paid job
- no job
- leaving parental home
- living together/marriage first partner
- divorce from first partner
- living together/marriage second partner
- having first child
Unaffected by squaring of the above variables
O-Sum-cy-mq-v-7-ab=-.00 p < .05
Age squared (B = -.002)
This effects disappears after control for the 
above mentioned
- personal characteristics
- life course transitions


Appendix 1: Happiness measures used
CodeFull Text
O-Sum-cy-mq-v-7-aSelfreport on four questions:

Using the 1-7 scale below, indicate how much each of the following statements applies for you in the last 18 months.
A In most ways my life is close to ideal
B The conditions of my life are excellent
C I am satisfied with my life
D So far, I have gotten the important things I want in life

Answers rated:
7 applies completely
6 apllies
5 apllies slightly
4 neither applies nor does not apply
3 slightly not applicable
2 not applicable
1 applies not at all

Computation: A+B+C+D divided by 4

Name: Shortened Diener's Satisfaction with Life Scale (SWLS), last years version
(In the original scale item 5 reads: 'If I could live my life over, I would change nothing'. This item is left out in this selection because a positive answer to this question does not necessarily mean that the respondent doesn't like the life he/she actually lives.)


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