Media type: E-Article Title: 'Freedom of Choice' and Filtral Opportunity Rankings: Representation and Aggregation Contributor: Vannucci, Stefano imprint: Elsevier BV, 2000 Published in: SSRN Electronic Journal Language: English DOI: 10.2139/ssrn.223545 ISSN: 1556-5068 Keywords: Pharmacology (medical) Origination: Footnote: