Ben Cohen's book International Political Economy: An Intellectual History describes the history of IPE as having led to two separate and incommensurate camps: 'American' IPE and 'British' IPE.
Buku Ben Cohen berjudul International Political Economy: An Intellectual History mencantumkan bahwa EPi terpecah menjadi dua kubu: EPI 'Amerika' dan EPI 'Britania'.