My name is Abderrahman, aka. Abdou, currently working as a research assistant in Transport Economics (TEK) unit at VTI - Stockholm. I am also enrolled at Linköping University and follow doctoral studies in Infra Informatics. The main research project that I am currently working on is SamEff (Samhällsekonomiskt effektiv tilldelning av järnvägskapacitet) which translates to Socio-economically efficient railway capacity allocation. It aims at improving the railway capacity allocation in Sweden using cost benefit analysis, mathematical programming and welfare-economics. I also work with operations research methods (e.g. mathematical programming) for OD-estimation and train timetabling.