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    • Social media index as proxy of the Brazilian consumer confidence index 

      Farias, Renato M. S.; Campelo Junior, Aloísio; Bittencourt, Viviane Seda
      2019
      In this paper we formalize a Social Media Index (SMI) based on sentiment analysis performed on Twitter messages publicly available in the Portuguese language. This (possibly high-frequency) index shows the ability to detect ...