Department of International Development, University of Oxford Centre for Research on Inequality, Human Security and Ethnicity, CRISE Queen Elizabeth House, University of Oxford, Mansfield Rd, OX1 3TB, UK Tel: +44 1865 281810; Fax: +44 1865 281801; http://www.crise.ox.ac.uk/ Fluid identities: Exploring ethnicity in Peru Maritza Paredes CRISE WORKING PAPER No. 40 June 2007