"Dani Rodrik's piece":http://www.project-syndicate.org/commentary/how-economists-killed-policy-analysis-by-dani-rodrik on the reasons why political economy needs
"Matthew Yglesias":http://thinkprogress.org/yglesias/2011/11/16/370007/the-social-graph-is-neither-social-nor-a-graph/ quotes Maciej Ceglowski "complaining":http://blog.pinboard.in/2011/11/the_social_graph_is_neither/ about the concept of
Michael Heaney has put together an interesting "article/symposium of essays":http://www-personal.umich.edu/~mheaney/Causality_in_Political_Networks.pdf