Using a classification method developed in this paper, the quality of qualitative survey data of the manufacturing industry at micro-economic level is investigated. For single companies, recent opinions on recent production developments are compared to quantitative results of industrial...

The answers to qualitative questions put to economic operators can be integrated in standard macro-economic analysis by using a "quantification" procedure chosen among the probabilistic approach, the regression methods or the latent factor approach. The first one is the most commonly used. It is...