Anthony Zurcher in a blog for the BBC reviews the burgeoning infuence of campaign finance in deciding the result of the 2014 US Congressional elections.
Hans Keman of VU University Amsterdam analyses the democratic performance and legitimacy of political parties across 20 European nations from 1990 to 2010.
Martin Gilens of Princeton University and Benjamin Page of Northwestern University find that economic elites and business-based interest groups drive US policy.