Copyright © 2012 International Food Policy Research Institute
IFPRI holds the copyright to its publications and Web pages but encourages duplication of these materials for noncommercial purposes. Proper citation is requested and prohibits modification of these materials. Permission to make digital or hard copies of part or all of this work for personal or classroom use is hereby granted without fee and without a formal request provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and full citation on the first page. Copyright for components not owned by IFPRI must be honored and permission pursued with the owner of the information. To copy otherwise, to republish, to post on servers, or to redistribute to lists, requires prior specific permission.
Request permission to publish from:
Communications Division
IFPRI
2033 K Street, NW
Washington, DC 20006-1002, USA
e-mail: ifpri-copyright@cgiar.org
Tel: 202-862-5600
Fax: 202-467-4439