The authors measure the monetary value households place on preventing malaria in Tembien, Tigray Region, Ethiopia. They estimate a household demand function for a hypothetical malaria vaccine and compute the value of preventing malaria as the household's maximum willingness to pay to provide vaccines for all family members. They contrast willingness to pay with the traditional costs of illness (medical costs and time lost because of malaria). Their results indicate that the value of preventing malaria with vaccines is about US36ahouseholdayear,orabout15percentofimputedannualhouseholdincome.Thisis,onaverage,abouttwoorthreetimestheexpectedhouseholdcostofillness.Despitethegreatbenefitsfrompreventingmalaria,thefactthatvaccinedemandispriceinelasticsuggeststhatitwillbedifficulttoachievesignificantmarketpenetrationunlessthevaccineissubsidized.Theauthorsobtainsimilarresultsforinsecticide−treatedbednets.Theirestimatesofhouseholddemandfunctionsforbednetssuggestthatatapricethatmightpermitcostrecovery(US6 a bed net), only a third of the population of a 200-person village would sleep under bed nets.Early Child and Children's Health,Public Health Promotion,Disease Control&Prevention,Health Monitoring&Evaluation,Economic Theory&Research,Health Monitoring&Evaluation,Economic Theory&Research,Climate Change,Environmental Economics&Policies,Early Child and Children's Health