Messarra, Nasri2018-10-232018-10-2320162016http://196.43.179.3:8080/xmlui/handle/123456789/4321.Introduction; 2.A broader meditation on research on OSN; 3.Using fake and real profiles to uncover and rebuild a fan's social graph; 4.A web of hubs: the saprtacus experiment; 5.negative WoM and its transmission on OSN: the determining role of the seeding population; 6.Finding bridges for political influence; 7.Rethinking marketing on fecebook; 8.Making sense of everything: A personal branding case study from start to finish; 9.Disussion and conclusionen-USBook