TY  - JOUR
AU  - Miguel,Edward
AU  - Kremer,Michael
TI  - Worms: Education and Health Externalities in Kenya
JF  - National Bureau of Economic Research Working Paper Series
VL  - No. 8481
PY  - 2001
Y2  - September 2001
UR  - http://www.nber.org/papers/w8481
L1  - http://www.nber.org/papers/w8481.pdf
N1  - Author contact info:
Edward Miguel
Department of Economics
University of California, Berkeley
530 Evans Hall #3880
Berkeley, CA 94720
Tel: 510/642-7162
Fax: 510/642-6615
E-Mail: emiguel@econ.berkeley.edu

Michael Kremer
Harvard University
Department of Economics
Littauer Center M20
Cambridge, MA 02138
Tel: 617/495-9145
Fax: 617/495-7730
E-Mail: mkremer@fas.harvard.edu
AB  - Intestinal helminths - including hookworm, roundworm, schistosomiasis, and whipworm - infect more than one-quarter of the world's population. A randomized evaluation of a project in Kenya suggests that school-based mass treatment with deworming drugs reduced school absenteeism in treatment schools by one quarter; gains are especially large among the youngest children. Deworming is found to be cheaper than alternative ways of boosting school participation. By reducing disease transmission, deworming creates substantial externality health and school participation benefits among untreated children in the treatment schools and among children in neighboring schools. These externalities are large enough to justify fully subsidizing treatment. We do not find evidence that deworming improves academic test scores. Existing experimental studies, in which treatment is randomized among individuals in the same school, find small and insignificant deworming treatment effects on education; however, these studies underestimate true treatment effects if deworming creates positive externalities for the control group and reduces treatment group attrition.
ER  -