Doing Ethnography in the Land of Informants (Vincent Planel) Paper presented on january 12th 2013 in London, at the conference “Yemen : Challenges for the Future”, organized by The British-Yemeni Society (BYS) & the London Middle East Institute (LMEI) at the School of Oriental and African Studies. Full program of the conference : http://www.b-ys.org.uk/activities/yemen-challenges-future-conference