Milena KLASING-CHEN, a PhD student at MINES ParisTech and at the RATP (Autonomous Operator of Parisian Transports), is talking about her training, the reasons that led her to do a thesis in France at the CGS - MINES ParisTech, but also about her research regarding the urban mobility and the cost reduction of public transports, supervised by Armand Hachtuel father of the C-K Theory.