Methods for quantifying effects of social unrest using credit card transaction data Xiaowen Dong, Joachim Meyer, Erez Shmueli, Burçin Bozkaya and Alex Pentland EPJ Data Sci., 7 1 (2018) 8 Published online: 13 April 2018 DOI: 10.1140/epjds/s13688-018-0136-x