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Distribution of treatments over participants and waves.
| Educational level | Wave 1 | Wave 2 | Wave 3 | Wave 4 | Wave 5 | Wave 6 |
| Educational level A | SCS2a | SCS1b | SCS3c | SCS2 | SCS1 | SCS3 |
| Educational level B | SCS3 | SCS2 | SCS1 | SCS3 | SCS2 | SCS1 |
| Educational level C | SCS1 | SCS3 | SCS2 | SCS1 | SCS3 | SCS2 |
aSCS2: second social comparative setting.
bSCS1: first social comparative setting.
cSCS3: third social comparative setting.
