Gonález-Bailón, SandraPetchler, Ross2023-05-222023-05-222015-01-012017-04-28https://repository.upenn.edu/handle/20.500.14332/2169This is a draft chapter. The final version is available in Handbook of Digital Politics, edited by S. Coleman and D. Freelon, published in 2015 by Edward Elgar Publishing Ltd.UK. The material cannot be used for any other purpose without further permission of the publisher, and is for private use only.CommunicationSocial and Behavioral SciencesBook Chapter