• Nonparametric decision tree: the impact of ISO 9000 on certified and non certified companies 

      Texeira Quirós, Joaquín; Almaça, José António Figueiredo; Justino, Maria do Rosário Fernandes (Intangible Capital, 2013-11)
      Article
      Accés obert
      Purpose: This empirical study analyzes a questionnaire answered by a sample of ISO 9000 certified companies and a control sample of companies which have not been certified, using a multivariate predictive model. With this ...