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Correlational findings

Study Kohler et al. (2005): study DK 2002

Public:
20-70 aged identical twins, Denmark, 2002
Sample:
Respondents:
N = 3226
Non Response:
26%
Assessment:
Questionnaire: paper

Correlate

Authors's label
Currently in partnership
Our Classification
Operationalization
0 no
1 yes

Observed Relation with Happiness

Happiness Measure Statistics Elaboration / Remarks O-SLu-u-sq-v-4-g = WITHIN MONOZYGOTIC TWIN-PAIR DIFFERENCE IN HAPPINESS O-SLu-u-sq-v-4-g Beta = + p < .01 Beta's controlled for:
- at least one partnership

- females
  - aged 25-45 years: Beta = +.23 (01)
  - aged 50-70 years: Beta = +.26 (01)
- males
  - aged 25-45 years: Beta = +.38 (01)
  - aged 50-70 years: Beta = +.27 (01)

Regression analysis with following controll variables yield similar resuls:
- interaction between currently in partnership and age
- number of separations
- number of children
- firstborn boy/girl, number of additional children
- number of additonal children, interaction between currently in partnership, at least one child
- at least one child, number of additonal children, remaining with the same partner as for the first child
- at least one child, number of additonal children, first birth at or before age 21

Exceptions are:
- males aged 25-45 years, controlled for number of seperations Beta = =.30 (01)

Also the interaction between partnership and age does not matter
O-SLu-u-sq-v-4-g = BETWEEN ALL SUBJECTS DIFFERENCE IN HAPPINESS O-SLu-u-sq-v-4-g = Regression analysis across all subjects yielded similar results.

Exceptions are males aged 25-45, controlled for different variables, yield somewhat lower results