Table 1.
Summary of the models
| Model | Level-1 (within individual) | Level-2 (between individual) |
|---|---|---|
| 1 | yij = π0i + ɛij | πoi = Intercept00 + ζ0i |
| 2 | yij = π0i + π1iAGE + π2iAGE2 + ɛij | πoi = Intercept0 + DEMOGRAPHICS + ζ0i, π1i = Intercept1 + DEMOGRAPHICS + ζ1i, π2i = Intercept2 + DEMOGRAPHICS + ζ2i |
| 3 | yij = π0i + π1iAGE + π2iAGE2 + ɛij | πoi = Intercept0 + DEMOGRAPHICS + SEP + ζ0i, π1i = Intercept1 + DEMOGRAPHICS + SEP + ζ1i, π2i = Intercept2 + DEMOGRAPHICS + SEP + ζ2i |
| 4 | yij = π0i + π1iAGE + π2iAGE2 + ɛij | πoi = Intercept0 + DEMOGRAPHICS + SEP + PARENTING + ζ0i, π1i = Intercept1 + DEMOGRAPHICS + SEP + PARENTING + ζ1i, π2i = Intercept2 + DEMOGRAPHICS + SEP + PARENTING + ζ2i |
| 5 | yij = π0i + π1iAGE + π2iAGE2 + ɛij | πoi = Intercept0 + DEMOGRAPHICS + SEP + PARENTING + SEP × PARENTING + ζ0i, π1i = Intercept1 + DEMOGRAPHICS + SEP + PARENTING + SEP × PARENTING + ζ1i, π2i = Intercept2 + DEMOGRAPHICS + SEP + PARENTING + SEP × PARENTING + ζ2i |