| Level 1: | Yij = β0j + β1(positive interaction)j + β2(friend rel.)j + β3(romantic rel.)j +rij |
| Level 2: | β0j = γ00 + γ01(gender) + γ02(mean positive interaction) + u0j |
| β1j = γ10 | |
| β2j = γ20 | |
| β3j = γ30 |
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