“…Authors have argued that some of the flaws regarding accountability stem not from the shortage of legal measures, but rather from the difficulties faced by regulators when trying to use or adapt these measures (Leander 2012), or from the lack of precision in these measures, meaning that they fail to encompass the whole spectrum of services that PMSCs offer (Isenberg 2004). Faced with what most observers have regarded as unsatisfactory legal accountability, a considerable number of studies have debated innovations or changes to existing legal measures that would allow PMSCs to better be held accountable for their actions (Singer 2004, Holmqvist 2005, Kinsey 2006, Krahmann 2006, Perrin 2006, O'Brien 2007, Caparini 2007, White and MacLeod 2008, Cockayne et al 2009, Brooks 2007, Faite 2004, Avant 2007aand b, Ronzitti and Francioni 2011.…”