LibrelloPolitics and Governance2120140120Governing Big Data1210.12924/pag2014.02010001ENAndrejJ.ZwitterFaculty of Law, University of Groningen, The Netherlands. a.zwitter@rug.nlAmeliaHadfieldDepartment of Psychology, Politics and Sociology, Canterbury Christ Church University, UK. Amelia.Hadfield@canterbury.ac.ukPaG-2.1.120140110201401202.5 quintillion bytes of data are created every day through pictures, messages, gps-data, etc. "Big Data" is seen simultaneously as the new Philosophers Stone and Pandora's box: a source of great knowledge and power, but equally, the root of serious problems.