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Comparison of the Kendall τ correlation coefficients of the ClickStream ranking with the rankings produced by 2DRank (x-coordinate) and CycleRank (y-coordinate) over a sample of 1000 random articles. If for a given article y > x, then the correlation between the CycleRank and ClickStream rankings is higher than the correlation between the 2DRank and ClickStream rankings (green triangles), and vice versa for y ≤ x (yellow inverted triangles). (Online version in colour.)
