title: Worldwide topology of the scientific subject profile: a macro approach in the country level.
abstract: BACKGROUND
  Models for the production of knowledge and systems of innovation and science are key elements for characterizing a country in view of its scientific thematic profile. With regard to scientific output and publication in journals of international visibility, the countries of the world may be classified into three main groups according to their thematic bias.
  
  
  RESULTS
  This paper aims to classify the countries of the world in several broad groups, described in terms of behavioural models that attempt to sum up the characteristics of their systems of knowledge and innovation. We perceive three clusters in our analysis: 1) the biomedical cluster, 2) the basic science & engineering cluster, and 3) the agricultural cluster. The countries are conceptually associated with the clusters via Principal Component Analysis (PCA), and a Multidimensional Scaling (MDS) map with all the countries is presented.
  
  
  CONCLUSIONS
  As we have seen, insofar as scientific output and publication in journals of international visibility is concerned, the countries of the world may be classified into three main groups according to their thematic profile. These groups can be described in terms of behavioral models that attempt to sum up the characteristics of their systems of knowledge and innovation.
authors.affiliation: CSIC/CCHS/IPP, SCImago Group, Madrid, Spain.
authors.forename: Félix
authors.initials: F
authors.lastname: Moya-Anegón
authors.affiliation: University Granada, SCImago-UGR, Granada, Spain.
authors.forename: Víctor
authors.initials: V
authors.lastname: Herrero-Solana
mesh_terms: D010506:Periodicals as Topic; D012106:Research