Formation of homophily in academic performance: Students change their friends rather than performance.

Following an alternative approach for scalar variables we compute the assortativity coefficient r [ 54 ] and again find highly significant homophily at the last time point r HS (6) = 0.20 ( p -value < 10 −4 ) and r U,4 (14) = 0.21 ( p -value < 10 −4 ).

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