An application of Best Worst Scaling (BWS) to understand buyer priorities for cookstoves in Zambia

The main objective of the BWS module in the ZCCS survey is to understand buyer priorities for cookstoves within the sampled study locations. To elicit the utility for different attributes, each respondent was presented with a hypothetical scenario that presented a kind of cookstove technology. These scenarios were described by a total of five attribute levels, of which were changed over the different scenarios. In each scenario, the respondent then indicated which item encouraged them the most to buy the cookstove (best) and which encouraged them the least (worst). A total of 28 attribute levels were developed for this study. The BWS was administered to both improved cookstove users and prospective users, and a total of 506 households were interviewed.

 

Carbon Monoxide Exposure and Cognitive Function Among Cooks in Lusaka, Zambia

This paper uses personal exposure measurements, self-reported health symptoms, and neurocognitive test scores of primary cooks in urban Zambian households to explore the impact of CO on cognitive function. We measure 24-hour carbon monoxide exposure of 431 primary cooks in Lusaka, Zambia. We quantify the consistency between self-reported versus quantitatively estimated neurocognitive health effects determined from estimated %COHb calculated from the CO exposure, and we compare %COHb levels to neurocognitive test scores administered to cooks in their homes.

 

Impacts of stove type on primary cook health: Evidence from Lusaka, Zambia

The negative health impacts of fuel burning and exposure to air pollution are well documented in public health and energy poverty literatures. One aim of many improved cookstove interventions is the reduction of adverse health impacts such as cough, headaches, eye irritation, and burns for primary cooks and other members of households that rely on biomass fuel for their cooking needs. The 2019 baseline survey of the Zambia Clean Cooking Study includes data on stove use, cooking practices, and self-reported health outcomes for primary stoves in four compounds in Lusaka, Zambia. From this cross-sectional survey of 1,377 households, preliminary evidence suggests that improved cookstoves (including the EcoZoom, MimiMoto, and electric stoves) have significant advantages over traditional stoves and cooking methods to protect against adverse health impacts. These findings add to the growing evidence base in support of cookstove interventions for populations where ubiquitous electricity access has not been achieved.

 

Comparison of Personal Exposure Data for Urban Zambia and Malawi and Rural Malawi

During the 2019 baseline campaign of the ZCCS, 24-hour carbon monoxide (CO) and particulate matter (PM2.5) personal exposure was measured for the primary cooks in a subset of participating households. The primary cooks were asked to wear both monitors in their breathing zone for 24 hours, with the PM monitor collecting measurements ever 10 seconds and the CO monitor every minute. The 24-hour averages and hourly trends of both pollutants are compared across compounds, throughout the day, by primary stove type, by intervention status, etc. In 2013 and 2014, similar personal exposure data were collected in rural and urban Malawi under a separate project. The 24-hour CO and PM averages and hourly CO trends are compared by rural versus urban Malawi, urban Malawi versus urban Zambia, primary stove type, etc.