Figure 4From: Corporate payments networks and credit risk ratingDistribution of ratings in the three partitions, modularity (top), hierarchy (bottom). The dashed lines are the unconditional (null) distribution of ratings among nodes in the entire sample. A full marker indicates that the over (above the dashed line) or under (below the dashed line) representation with respect to the null distribution is statistically significant in the hypergeometric test at 1% significance level with Bonferroni correctionBack to article page