- 18-88 aged, general public, Denmark, 1993
- N = 1494
- Non Response:
- Authors's label
- type of parents
- Our Classification
- type of parents, made up by the questions:
"Were you adopted as a child ?"
"Are both your parents/adoptive parents alive?"
a: biological mother and father
b: biological mother and stepfather
c: biological father and stepmother
d: adoptive parents
Observed Relation with Happiness