| Correlate as named by investigator | People investigated | |
| Finding | Industrial sector | 14+ aged, general public EU nations 1979-1994 |
| Finding | Industrial contribution to BNP | Adults, general public, 48 nations, around 1990 |
| Finding | Agricultural contribution to BNP | Adults, general public, 48 nations, around 1990 |
| Finding | Energy consumption per capita | Adults, general public, 48 nations, around 1990 |