Tom Murphy (@viewfromthecave) has an interesting post on new research into the relationship between irrigation and malaria. Obviously farmers benefit greatly from improved irrigation in arid regions. It’s well known that increasing irrigation, however, also brings about more mosquitos and more malaria. This new paper finds that the malarial effect lasts a lot longer than expected.
It’s true that areas that have long had irrigation have lower malaria rates, but those numbers don’t start falling until a decade or longer after the improvements. Regions that are newly transitioning to irrigation, on the other hand, are at much greater risk of malaria. This is true even when the government enacts proactive policies to combat the problem.
Two of the best economists on the topic of agriculture and development, Margaret McMillan and William Masters, have teamed up with a good development economist from Oklahoma State University, Harounan Kazianga, and written an interesting new working paper called Disease Control, Demographic Change and Institutional Development in Africa. The abstract below gives more details, but they essentially find that selective treatment of river blindness has had a significant long term effect on population growth and institutions in those villages. I am teaching a Ph.D. class on development this fall and I have a section on institutions, geography, and development. Looks like I have a new addition to the syllabus:
This paper addresses the role of tropical disease in rural demography and land use rights, using data from Onchocerciasis (river blindness) control in Burkina Faso. We combine a new survey of village elders with historical census data for 1975-2006 and geocoded maps of treatment under the regional Onchocerciasis Control Program (OCP). The OCP ran from 1975 to 2002, first spraying rivers to stop transmission and then distributing medicine to help those already infected. Controlling for time and village fixed effects, we find that villages in treated areas acquired larger populations and also had more cropland transactions, fewer permits required for cropland transactions, and more regulation of common property pasture and forest. These effects are robust to numerous controls and tests for heterogeneity across the sample, including time-varying region fixed effects. Descriptive statistics suggest that treated villages also acquired closer access to electricity and telephone service, markets, wells and primary schools, with no difference in several other variables. These results are consistent with both changes in productivity and effects of population size on public institutions.