Pinheiro, Cássia Rainny Pires; Hoffmann, Andrea Ribeiro.(Advisor) Electoral Algorithms: Data Mining Impacts on a Democracy. Rio de Janeiro, 2018. 40p. Dissertação de Mestrado -Instituto de Relações Internacionais, Pontifícia Universidade Católica do Rio de Janeiro. This paper presents as a case study the North American election of 2016 and the use of electoral propaganda as a way to illustrate the new Data Economy. The era of the "information society" (Castells, 1999) makes use of communication

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... technologies to inform, make purchases, maintain contacts, and part of this process requires that information be provided that will be stored in large databases. Cambridge Analytica is one of the participants in this newly formed market, which has been able to put an economic value on the vast amount of data, and through mining and analysis of data have been able to form a profile of voters, and this is the company's product: targeted advertising. With the rise of the Internet it was possible to increase the intensity with which information is transferred, the ability to change speed and reduce distances is what differentiates the new phase of world history. Giving the appearance of pricing the user information -which eventually become products in this marketthis article intends to present the need to strengthen the legislation that prescribes how these companies should act. Especially because in the absence of laws that require consent, the transparency of mining, and how data analysis is done, the rights of individuals are undermined, and we are faced with the possible manipulation of the share of society that is affected by the advertisements . And if democracy is governed by freedom of information and a free society, the disinformation of that society becomes a threat.