Ciência-IUL
Publications
Publication Detailed Description
Journal Title
Physica A
Year (definitive publication)
2015
Language
English
Country
Netherlands
More Information
Web of Science®
Scopus
Google Scholar
This publication is not indexed in Google Scholar
Abstract
Consider a network connecting individual agents that are endowed with distinct sentiments or ‘views of the world’. Specifically, assume that each node in the network contains an agent that, at a given period t, can be found in one of five states: sentiment neutrality, exuberant optimism, non-exuberant optimism, exuberant pessimism and non-exuberant pessimism. Local interaction rules, similar to those one encounters in rumor propagation models, make agents change their sentiment as they contact with others. Under a continuous-time framework, the proposed setting delivers a stable fixed-point equilibrium, meaning that the shares of agents in each sentiment category will converge to constant steady-state levels. The inspection of the same structure of analysis in discrete-time indicates that the stability outcome continues to hold when the connectivity degree is equal to 1. However, this result might change as one considers higher-order connectivity. In this last case, persistent endogenous waves of optimism and pessimism emerge under a reasonable parameterization of the model.
Acknowledgements
--
Keywords
Homogeneous networks,Sentiment-switching,Stability,Endogenous fluctuations,Waves of optimism and pessimism
Fields of Science and Technology Classification
- Physical Sciences - Natural Sciences
Funding Records
Funding Reference | Funding Entity |
---|---|
UID/GES/00315/2013 | Fundação para a Ciência e a Tecnologia |