This visualization gives an overview of the whole citation network. The colors represent the four main groups of journals, which are further subdivided into fields in the outer ring. The segments of the inner ring represent the individual journals, scaled by Eigenfactor™ Score. In the initial view, the top 1000 citation links are plotted. Line size and opacity represents connection strength. The Bezier curves follow the hierarchical cluster structure, using the hierarchical edge bundling technique (pdf). Selecting a single journal (inner ring) or whole field (outer ring) displays all citation flow coming in or out of the selection. The colour is based on the cluster color of the origin node.
http://well-formed.eigenfactor.org/radial.html#/?id=p_4,1
very interesting. check out economics and how (especially relative to other sciences, not surprisingly) self referential it is.