The relationship between the R² export growth prediction using the role clusters (x-axis) and using the logarithm outdegree/indegree ratio (y-axis).

Each observation is a decade-product combination: the x-axis values are the R² values reported in Table 1, excluding product 3 and the 2000-2010 decade. The black line is the identity line: observations below the line are the ones for which the role clusters performed better than the log degree ratio.