- 18+ aged, general public, USA, 1972-1982
- N = 13581
- Non Response:
- Interview: face-to-face
- Authors's label
- Membership of Voluntary organisations
- Our Classification
- Single direct question: Here is a list of organisations. Could you tell me whether or not you are member of each type?
0 belongs to none
1 belongs to one
2 belongs to 2 or more
Observed Relation with Happiness
The relationship disappears after control for marital status.