Umwelt und Ressourcen

Projekt: Impact Evaluation of the National Domestic Biogas Program (NDBP) in Rwanda


02/2012 - 12/2012 (abgeschlossen)


Netherland’s Ministry of Foreign Affairs, Policy and Evaluation Department (IOB), SNV Netherlands Development Cooperation

Projektteam (RWI)

Prof. Dr. Jörg Peters (Leitung), Dr. Maximiliane Sievert


International Institute of Social Studies (ISS); IB&C Kigali




Like in most rural areas of developing countries, the vast majority of rural households in Rwanda uses charcoal or firewood for cooking purposes. This is associated with various negative effects on health, gender, and the disposable income of households. Furthermore, in densely populated Rwanda, the demand for woodfuels causes unsustainable wood extraction and, thereby, contributes to deforestation. Next to the dissemination of improved cooking stoves that increase the efficiency of woodfuel based cooking processes, the usage of biogas produced from dung is a potential remedy to these problems. Implemented by the Govern-ment of Rwanda with technical assistance of SNV, the National Domestic Biogas Program (NDBP) envisages disseminating 15,000 domestic biogas digesters in rural Rwanda. One digester generates gas to provide cooking energy that suffices for one or two families. The objective of the present study is to evaluate the impacts of biogas usage on the household’s fuelwood consumption, energy expenditures, firewood collection time, and health. For this purpose, around 600 households will be surveyed to conduct a cross-sectional comparison of digester owners to non-owners. Around 300 biogas users will be drawn from the list of users available from the NDBP for inclusion in the treatment sample. All users will share the characteristic of having at least two cows, which is a precondition for being eligible for the programme’s subsidy. In each village, in which a digester user will be interviewed, a household that does not own a digester but that has the same number of cows as the interviewed digester owner will be selected and interviewed for the comparison group. Since ownership of cows is a quite accurate proxy for wealth and since both the digester using household and its comparison household are living in the same village, the treatment and the comparison groups should be sufficiently comparable. Furthermore, multivariate methods will be used to control for socio-economic differences in education, income, or household size.