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Using complex networks to analyze the Brazilian Chamber of deputies
Brito, Ana Caroline Medeiros
Biblioteca Digital de Teses e Dissertações da USP; Universidade de São Paulo; Instituto de Ciências Matemáticas e de Computação 2020-09-11
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Título:
Using complex networks to analyze the Brazilian Chamber of deputies
Autor:
Brito, Ana Caroline Medeiros
Orientador:
Amancio, Diego Raphael
Assuntos:
Ciência Política
;
Partidos Políticos Brasileiros
;
Redes Complexas
;
Redes Complexas Sociais
;
Brazilian
Political
Parties
;
Complex Networks
;
Political
Science
;
Social Complex Networks
Notas:
Dissertação (Mestrado)
Descrição:
Complex networks are widely used to model individuals and their social interactions. In this research project, we use this representation to explore the voting data of Brazilian legislators of the Chamber of Deputies (from 1991 to 2019). When generating co-voting networks consisting of deputies as nodes connected by their similarity in their voting propositions behaviors, we aim to characterize
political
entities behavior:
political
parties cohesion, coalitions and their dynamics of emergence and dissolution. To this end, we defined a framework consisting of procedures in order to generate co-voting networks by year and, alternatively, by overlapping windows of three months; removal of less meaningful edges; communities identification; and the definition of isolation and fragmentation measures for groups characterization. The yearly networks analysis allows an overview of the Brazilian
political
scenario. For example, the most recent networks seem less cohesive than those in the early years, indicating that the deputies are overall in less agreement. The identified communities tend to represent the coalitions established among political parties. Furthermore, the effective number of communities reveals that there are few groups in comparison to the wide number of political parties in the Brazilian system. The characterization of these groups by using topological measures, revealed some interesting phenomenons, such as coalitions changes correlated with terms changes. The detailed analysis of the months before, during, and after the Rousseffs impeachment revealed that she did not have support of the Chamber of Deputies months before she left office.
DOI:
10.11606/D.55.2020.tde-29102020-120145
Editor:
Biblioteca Digital de Teses e Dissertações da USP; Universidade de São Paulo; Instituto de Ciências Matemáticas e de Computação
Data de criação/publicação:
2020-09-11
Formato:
Adobe PDF
Idioma:
Inglês
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