P ROGRAM ON THE GLOBAL D EMOGRAPHY OF AGING Working Paper Series Assessing the Economic Impact of HIV/AIDS on Nigerian Households: A Propensity Score Matching Approach David Canning, Ajay Mahal, Kunle Odumosu, Prosper Okonkwo All Correspondence and Requests for Reprints should be directed to: Dr. Ajay Mahal Mailing Address: Harvard School of Public Health, Department of Population and International Health, 665 Huntington Avenue, Boston MA 02115, U.S.A.; Email: amahal@hsph.harvard.edu Funding: This work was supported by the Bill and Melinda Gates Foundation under its AIDS Prevention Initiative in Nigeria (APIN) project. PGDA Working Paper No. 16: http://www.hsph.harvard.edu/pgda/working.htm The views expressed in this paper are those of the author(s) and not necessarily those of the Harvard Initiative for Global Health. The Program on the Global Demography of Aging receives funding from the National Institute on Aging, Grant No. 1 P30 AG024409-01. ©2006 by David Canning, Ajay Mahal, Kunle Odumosu, Prosper Okonkwo. All rights reserve