An, J. and Kwak, H. 2017. Data-Driven Approach to Measuring the Level of Press Freedom Using Media Attention Diversity from Unfiltered News. Proceedings of the International AAAI Conference on Web and Social Media. 11, 1 (May 2017), 739-742. DOI:https://doi.org/10.1609/icwsm.v11i1.14980.