The Qatar Computing Research Institute (Motto: “See? Qatar has a soccer culture!”) put out a research paper comparing European club teams based on their passing styles.

The paper itself
An article from The Economist summarizing the paper

I wanted to share this to make a point about accessibility.  Compare Fig. 6 in the original paper with the graph on the top of The Economist summary.  Both convey the same information, but one is far more useful.