Whose Lives Matter? Mass Shootings and Social Media Discourses of Sympathy and Policy, 2012-2014. - Yini Zhang; Dhavan V. Shah; Jordan M. Foley; Aman Abhishek; Josephine Lukito; Jiyoun Suk; Sang Jung Kim; Zhongkai Sun; Jon Pevehouse; Christine Garlough (J. Comput. Mediat. Commun., 2019)