Abstract
Abstract This study analyzes the network evolution, specifically that of the Brazilian film network. It examines two generative mechanisms that lie behind the network evolution: preferential attachment and fitness. The starting point is that preferential attachment and fitness may compete to shape the network evolution. We built a novel dataset with 974 Brazilian feature films released between 1995 and 2017 and used PAFit, a brand-new statistical method, to estimate the joint effects of preferential attachment and fitness on the evolution of the Brazilian film network. This study concludes that the network evolution is shaped by both preferential attachment and fitness. However, in the presence of fitness, the effects of preferential attachment on the network evolution become weaker. This means that the node ability to form ties in the Brazilian film network is mainly explained by its fitness. Besides, the preferential attachment assumes a sub-linear form. Costs, communication and managerial capabilities, and node age explain why nodes are unable to accumulate ties at rates proportional to their degree. Finally, preferential attachment and fitness manifest themselves heterogeneously, depending on either the type or the duration of the network. Preferential attachment drives the cast network evolution, whereas fitness is the main generative mechanism of the crew network. Actors and actresses rely on their status, privilege, and power to obtain future contracts (preferential attachment), whereas technical members are selected on the basis of their talent, skills, and knowledge (fitness). Due to node age or exit, preferential attachment becomes stronger in shorter networks.
Highlights
O presente estudo traz uma análise da evolução de redes, especificamente da rede de filmes brasileiros, envolvendo dois mecanismos generativos subjacentes à formação de laços, a saber: ligação preferencial e aptidão
Atores e atrizes apoiam-se no status, no privilégio e no poder para a obtenção de contratos futuros
A rede de filmes brasileiros foi direcionada pela aptidão do nó; ou seja, os atributos dos nós são mais importantes para a formação de laços do que seus graus
Summary
Cinthya Rocha Tameirãoa Sérgio Fernando Loureiro Rezendeb Luciana Pereira de Assisa a Universidade Federal do Vale do Jequitinhonha e Mucuri, Diamantina, Brasil b Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte, Brasil. O presente estudo traz uma análise da evolução de redes, especificamente da rede de filmes brasileiros, envolvendo dois mecanismos generativos subjacentes à formação de laços, a saber: ligação preferencial e aptidão. O presente estudo pode contribuir com a literatura de quatro maneiras diferentes: primeiro, mostra que, tanto a ligação preferencial quanto a aptidão, afetam a evolução da rede de filmes brasileiros; segundo, mostra que a ligação preferencial assume uma forma sublinear; logo, a aptidão reduz os efeitos dela; terceiro, apresenta evidências acerca da heterogeneidade da rede de filmes brasileiros - o padrão de formação de laços da rede de atores e atrizes é diferente daquele da rede de técnicos e quarto, mostra que a ligação preferencial é mais forte quando observamos a evolução de redes curtas, ou seja, redes que abrangem menor intervalo de tempo
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