The average dependencies of PPV, Se and χ2 criterion on the total number of links for two artificial biological systems. System: (a) yeast glycolysis and (b) MAPK. Inference models: differential (blue), integral with the zero-degree polynomial kernel (red) and integral with the single-exponential kernel (green). The black lines indicate the inference by the integral model with the zero-degree polynomial kernel from permuted data. Confidence intervals for the obtained estimates are too narrow to be recognizable in the graphs and therefore not shown.