There's a lot of gold in the
ArXiV RSS feeds. See this one, for instance:
Community Structure in Congressional Cosponsorship Networks analyzes a social network where actors are members of the American Congress and Senate, and links are established if they have co-sponsored a law:
This analysis yields an explicit and conceptually clear measure of political polarization, demonstrating a sharp increase in partisan polarization which preceded and then culminated in the 104th Congress
Which only proves that we still have to learn a thing or two about democracy from America. A similar analysis in Spain would be meaningless: the governing party and its allies vote for whatever they propose, and the opposition against. Sometimes there's an abstention or two, if the thing is really controversial. And that's that.
