Interactions between social and individual REL ethics and social and individual EDU policies as differences between significant social linkages minus individual linkages.

Grey cells should not be analysed autonomously (i.e., they should be compared with other grey cells), since they provide differences of coefficients expressed in different units (i.e., 0 or 1 values with percentages in [0,1] and percentages of gross enrolments with per-student expenditures in $).