Media type: E-Article Title: Polarization and the Middle Class Contributor: Rossi, Maximo; Borraz, Fernando; Gonzalez, Nicolas imprint: Elsevier BV, 2011 Published in: SSRN Electronic Journal (2011) Language: English DOI: 10.2139/ssrn.2158437 ISSN: 1556-5068 Keywords: Pharmacology (medical) Origination: Footnote: