stacking up the ladder a panel data analysis of tanzanian household energy choices energy use statistics in tanzania reflect the country s low level of industrialization and development in 2016 only 16 9 of rural and 65 3 of urban inhabitants in mainland tanzania were connected to some form of electricity we use a nationally representative three wave panel dataset 2008 2013 to contribute to the literature on household energy use decisions in tanzania in the context of the stacking and energy ladder hypotheses we firstly adopt a panel multinomial logit approach to model the determinants of household cooking and lighting fuel choices secondly we focus explicitly on energy stacking behaviour proposing various ways of measuring what is inferred when stacking behaviour is thought of in the context of the energy transition and presenting household level correlates of energy stacking behaviour thirdly since fuel uses have gender differentiated impacts we investigate women s bargaining power in the decision making process of household fuel choices we find that whilst higher household incomes are strongly associated with a transition towards the adoption of more modern fuels especially lighting fuels this transition takes place in a context of significant fuel stacking in tanzania government policy has been aimed mostly at connecting households to the electric grid however the public health environmental and social benefits of access to modern energy sources are likely to be diminished in a context of significant fuel stacking lastly we present evidence that the educational attainment of women in the household is an important aspect of household fuel choices

fuel demand elasticities for energy and environmental policies indian sample survey evidence india has been running large scale interventions in the energy sector over the last decades still there is a dearth of reliable and readily available price and income elasticities of demand to base these on especially for domestic use of traditional fuels this study uses the linear approximate almost ideal demand system la aids using micro data of more than 100 000 households sampled across india the la aids model is expanded by specifying the intercept as a linear function of household characteristics marshallian and hicksian price and expenditure elasticities of demand for four main fuels are estimated for both urban and rural areas by different income groups these can be used to evaluate recent and current energy policies the results can also be used for energy projections and carbon dioxide simulations given different growth rates for different segments of the indian population

activity choice labor allocation and forest use in malawi this article examines the determinants of activity choice affecting forest use among low income households in malawi data from three villages are used to estimate a system of household labor share equations for maize production forest employment and non forest employment a system estimation approach is used to identify factors influencing the competing and synergistic livelihood strategies which households undertake at the forest margin results from constrained maximum likelihood estimation indicate heightened incentives to degrade forests when returns to forest use are high factors reducing forest pressure include favorable returns to non forest employment secondary education of the household head and wealth

household fuelwood demand and supply in nepal s tarai and mid hills choice between cash outlays and labor opportunity abstract subsistence households are a leading source of deforestation and their consumption of fuelwood in particular is important in many developing countries yet the empirical economic examinations of fuelwood consumption are sparse particularly for rural areas where the deforestation occurs and we would argue that forest policy is often designed without a good understanding of the potential responses of subsistence households to the new policy this paper addresses these issues with household evidence from the two major populated regions of nepal market prices labor opportunities the availability of substitutes and measure of access to the basic resource are the most reliable predictive variables for fuelwood consumption and production there are however regional differences and important distinctions between the elasticities of fuelwood collecting or purchasing households with respect to these predictive variables the difference between collecting and purchasing households is notable it recommends forestry policies that target the labor opportunity and the physical resource in regions where collecting households dominate and policies that affect the fuelwood market itself in regions where purchasing households are important a second interesting finding is that fuelwood is relatively scarcer prices are higher in the mid hills and both collecting and purchasing households in this region are beginning to respond to deforestation by using their own land for fuelwood production

a survey of agricultural household models recent findings and policy implications semicommercial farms that produce multiple crops make up a large part of the agricultural sector in developing economies these farms or agricultural households combine two fundamental units of microeconomic analysis the household and the firm traditional economic theory has dealt with these units seperately but in developing economies in which peasant farms dominate their interdependence is of crucial importance researchers have developed models of agricultural households that combine producer and consumer behavior in a theoretically consistent fashion recent empirical applications of these models have extended them and expanded the range of policy issues which can be investigated using this general framework this article reports the results of empirical applications of this model in india indonesia japan the republic of korea malaysia nigeria senegal sierra leone taiwan and thailand it provides a comparative analysis of the policy implications of the approach for such matters as the welfare of farm households the size of marketed surplus the demand for nonagricultural goods and services and for hired labor and the availability of budget revenues and foreign exchange

forests fuelwood and livelihoods energy transition patterns in eastern indonesia the central thesis of the energy ladder model is a unidirectional transition from primitive to advance fuel with increased affluence of households although now largely discredited this assumption remains a foundation of laissez faire policies that anticipate energy transition resulting spontaneous forest recovery with economic development our results suggest that such policies can undermine broader policy objectives and actually worsen forest conditions in rural indonesia based on a case study of forest margin communities in eastern indonesia we demonstrate that fuel subsidy reform did little to reduce rural household demand for fuelwood while dramatically increasing fuelwood demand for processing agricultural products our results show how household decisions related to fuel sources are affected by non economic considerations and external factors such as opportunities to sell fuelwood we argue that policy interventions that encourage energy transition of households do not necessarily improve forest conditions as household fuelwood use may be a symptom rather than a driver of deforestation and forest degradation thus policies to improve forest conditions should focus more on addressing the market environment of forest margin communities providing energy alternatives to small industries that are often the larger consumers of fuelwood

quasi option value some misconceptions dispelled abstract we discuss a couple of important issues in the recent literature on quasi option value we show that the assertion that quasi option value can be negative in a model with independent learning is based on confusion between quasi option value which is always positive and the net benefit of preservation of a natural environment subject to development which is not we also explore the significance of different assumptions about the nature of learning and show that the result that quasi option value is positive is surprisingly robust

residential bioenergy heating a study of consumer perceptions of improved woodstoves abstract consumers choices play a key role for the development of biomass heating in the residential sector the city of oslo has granted subsidies to households who change to new improved low emission woodstoves the purpose of this study is to expand the knowledge about users experiences and attitudes to residential biomass heating an adapted model of the theory of planned behavior was used to model households inclination to continue using their woodstoves for heating more than 800 questionnaires were collected from households that recently had invested in an improved woodstove the respondents were satisfied with the new woodstoves the respondents also considered themselves competent to use and maintain the stove and few had problems acquiring fuelwood further analyses showed that the intention to continue to use the new woodstove depends on economic benefits heating performance perceived time and effort to operate the stove environmental effects of heating as well as perceived subjective norm the results imply that when marketing a modern technology for bioenergy heating both public authorities and producers should consider issues related to the users perception of subjective norm such as perceived status of using bioenergy or environmental concerns when designing campaigns to promote the use of woodstoves

natural resources agriculture and property rights abstract the study explores empirically forest resource and soil quality degradation under different property rights regimes in a subsistence agriculture framework the quantitative analysis is a direct test of the theoretical hypothesis of larson and bromley 1990 larson b bromley d 1990 property rights externalities and resource degradation locating the tragedy journal of development economics 33 2 that common property and private property rights may lead to similar incentives for resource protection a household model is formulated and applied empirically with data from indonesia to test rates of forest biomass and soil quality degradation under private and common property rights results show that the two regimes may equal each other by including bequest value sensitivity analysis is conducted by changing model parameters

ecological economics and scientific controversies lessons from some recent policy making in the eec abstract contrasting the very limited scientific evidence on the forest dieback issue with the sudden adoption of policies on air pollution decided in the frg 1983 1984 and extended to the european community 1985 we propose an interpretative framework for the real internalization process at work in what was tantamount to a social crisis for public opinion the media and political actors we conclude that open scientific controversies on some environmental issues effects causes solutions pave the way for some actors to use the issue for their own techno industrial strategies quite alien to ecological constraints in cases of very high uncertainties on impacts it becomes impossible to apply conventional social cost benefit analysis scba as an optimizing tool we propose to develop economic analysis as a negotiation language and to give pride of place to the value of learning time and to the crucial role of technological pluralism as a condition for flexibility in the future

low quality or high quality coal household energy choice in rural beijing abstract household low quality coal consumption contributes to severe haze pollution in china in response subsidy policies on high quality coal consumption and the adoption of new type coal stoves have been implemented using survey data in rural beijing this paper characterizes the determinants of coal consumption and switching behavior between low quality and high quality coals to this end we apply bivariate probit regression and tobit regression to evaluate the effectiveness of government policies and the influence of cognitive psychological and socioeconomic factors on coal consumption behaviors our empirical results reveal that prosociality and local environmental concern play crucial roles in household choices and consumption behaviors between two types of coals but global environmental concern does not the promotion of new type coal stoves significantly facilitates the transition from low quality to high quality coal while price subsidies on high quality coal do not influence market acceptance of high quality coal these results demonstrate the importance of cognitive psychological factors and promotion policies on coal consumption behavior overall we suggest that an education campaign or program regarding local environmental awareness prosocial values and behaviors and on new type coal stoves should be further promoted to accelerate the transition from low quality to high quality coal

fuelwood consumption and forest degradation a household model for domestic energy substitution in rural india this paper disusses domestic en ergy supply and demand in rural india links be tween forest scarcity and household fuel collec tion are analyzed in a non separable household model focusing on substitution of non commer cial fuels from the commons and the private do main based on data from villages bordering a protected area a novel maximum entropy ap proach is used for estimation it is found that households respond to forest scarcity and in creased fuelwood collection time by substituting fuels from private sources for forest fuelwood however the magnitude of the response appears insufficient to prevent current fuelwood collection practices from causing serious forest degrada tion jel q24

household energy demand in kenya an application of the linear approximate almost ideal demand system la aids abstract this paper estimates price and fuel expenditure elasticities of demand by applying the linear approximate almost ideal demand system la aids to 3665 households sampled across kenya in 2009 the results indicate that motor spirit premium msp automotive gas oil ago and lubricants are price elastic while fuel wood kerosene charcoal liquefied petroleum gas lpg and electricity are price inelastic kerosene is income elastic while fuel wood charcoal lpg electricity msp and ago are income inelastic the results also reveal fuel stack behaviour that is multiple fuel use among the households main policy implications of the results include increasing the penetration of alternative fuels as well as provision of more fiscal incentives to increase usage of cleaner fuels this not withstanding however the household income should be increased beyond a certain point for the household to completely shift and use a new fuel

why have improved cook stove initiatives in india failed summary an estimated 2 7 billion people cook meals on biomass fueled brick stone and clay stoves scarcity of wood and negative impacts on health and environment have motivated efforts to design and distribute improved cook stoves in developing countries in india adoption is limited despite massive promotion over many decades existing research suggests that many rural women in india do not want improved stoves and those who do face obstacles to adoption we step back from the many good case studies to examine the broader story of improved cook stoves ics in india we do so by bringing together technical research of applied science and narrative critique of social science rather than assuming a priori that traditional stoves require replacement we ask why indian cook stoves been a magnet for so much attention why adoptions rates have remained low and what lessons might be learned from a broad multi disciplinary perspective our approach is critical and reflexive given our own involvement in ic efforts and puts gender at the center our big picture review shows that the indian chulha for all its problems is a remarkably successful technology which also satisfies several important household needs hence targeting this device for obsolescence has profound implications that cannot be reduced to energy consumption or environmental hazards rural women do not prioritize ics but addressing their priorities requires either capital intensive investment or challenging powerful institutions in contrast ic interventions are relatively cheap decentralized mechanical and seemingly apolitical hence their popularity in development programs our review of chulha research leads us to reject both the optimism of development planners who frame such problems as technical and the antagonistic pessimism of their critics searching for a middle ground requires stepping back from the dogma of efforts to improve biomass cook stoves

household fuel use in developing countries review of theory and evidence because of recent concerns about the negative externalities of traditional fuel use on the environment and health the issue of the household fuel transition in developing countries from dirty fuels towards clean fuels has received growing research attention this paper provides an up to date survey of the economic literature on household fuel use in these countries first we present the conceptual and theoretical frameworks then we discuss the empirical results that show how a wide range of factors drive the household fuel transition finally we suggest priorities for policy initiatives and highlight areas of future research

female labor force participation and household dependence on biomass energy evidence from national longitudinal data this research received financial support from the food policy institute at the australian national university

the determinants of household energy demand in rural beijing can environmentally friendly technologies be effective with the recent rapid economic growth total energy demand in rural china has increased dramatically and the energy structure is in the transition from non commercial to commercial sources simultaneously it is expected that households in rural areas will face energy shortages and additional environmental problems unless they have more access to renewable energy technologies however little is known about i the transition of energy use patterns and ii whether introduced technologies have been effective to analyze these issues we estimated the energy demands of rural households by using survey data taken from beijing s ten suburban districts the data contain information on both non commercial and commercial energy use key characteristics of the households and several renewable energy technologies our empirical analysis yielded three main results first the per capita income is a key factor in the per capita energy consumption more specifically the marginal increase or marginal change in per capita coal consumption strongly diminishes or declines as per capita income increases second coal and liquefied petroleum gas lpg prices do not exhibit substitution effects but an increase in these prices has strong negative effects on the use of these energy resources third renewable energy technologies are identified to reduce coal consumption and to improve energy efficiency overall these findings suggest a positive perspective if the chinese government were to design appropriate policies associated with renewable energy technologies and related energy prices then coal consumption can be reduced in the near future and the substitution to cleaner energy use will accelerate therefore a smooth energy transition in rural china could be made in a more environmentally sustainable manner

household energy mix in uganda abstract this paper presents evidence that household energy use in uganda conforms to the energy ladder theory as household income increases solid and transitional fuel use evolves in an inverse u manner while electricity consumption shows a direct relationship with income public infrastructure provision income and education are the key variables which can be targeted to reduce household dependence on solid fuels while increasing non solid fuel use while education and public infrastructure have varying impacts on rural and urban households energy mix these variables generally reduce rudimentary fuel use and increase modern fuel consumption timely investment in electricity infrastructure is necessary to cater for burgeoning electricity demand as households become affluent strategies for reforestation dissemination of improved cookstoves relieving supply side constraints for modern fuels and staggered payment options to lower the cost of entry for modern fuels can improve ugandan households energy security

startup costs and the decision to switch from firewood to gas fuel firewood remains a key source of energy for households in developing countries contributing to forest degradation and deforestation the adoption of alternative fuels may be hindered by high startup costs and this problem may be compounded by restrictions in credit availability we use survey data to examine how credit access affects firewood consumption in guatemala our results suggest that access to credit plays a statistically significant role in determining firewood consumption through its effect on the ability to purchase a gas stove however simulations suggest that these effects are small and that subsidizing stoves would be amore promising policy for reducing firewood consumption

quasi option value and climate policy choices in the climate change issue the environmental irreversibility risk of an acceleration of mitigation policies if the worst happens has to be balanced with the investment irreversibility risk of over cautious policies to explore this balance we define an option value for a precautionary climate policy using the simplest decision making model we expose how option value relates to the expected value of future information using quantitative data from an integrated assessment model we find that most of the time the environmental irreversibility dominates the investment irreversibility for all cases explored here the order of magnitude of the option value was significant about 50 of the opportunity cost

rising wages and energy consumption transition in rural china abstract residential energy consumption in rural china is undergoing a transition from traditional biomass energy to modern commercial energy this paper examines the impact of rising wage rates on energy consumption mix in rural china using a unique panel data set from our two round surveys of 409 rural households in 4 provinces the results show that the wage rate at the village level has a significant negative impact on traditional biomass energy consumption and significant positive effects on consumption of electricity and new renewable energy in rural china as traditional biomass energy is mainly collected with family labor and is relatively labor intensive an increase in rural wage rates would enhance the opportunity costs of traditional biomass energy leading to a reduction in biomass energy consumption continuously rising rural wage rates could accelerate the transition from biomass energy to electricity in rural areas these findings could have important policy implications not only for indoor air quality and environmental and health issues in rural areas but also for greater security in rural energy supply and policies to incentive farmers to better utilize biomass resource after harvest

household energy choice and consumption intensity empirical evidence from bhutan abstract this paper uses data from three bhutan living standard surveys blss 2003 blss 2007 and blss 2012 to examine the trends and patterns of household energy consumption and identify and analyze the factors that influence household energy choices consumption intensity and the per capita household expenditure on energy sources in bhutan during the last decade significant numbers of bhutanese households have switched to cleaner energy sources empirical results show that a household s choice of cleaner energy sources is driven by income level and household wealth the age gender and education of the household heads access to electricity and location education and income have a differential role on the choice of clean or dirty fuel wealthier and more educated households use and rely more on clean sources of energy like electricity and liquid petroleum gas while poorer households use and rely on dirty fuel such as fuelwood and kerosene the study shows that female headed households are more likely to choose cleaner fuels and above all the availability of a clean and cost effective source of energy within proximity to the household is an important factor in the adoption of clean energy several models using a variety of alternative independent variables such as proxies for education and wealth were estimated and confirmed the robustness of the results

the economic relevance of sustainable agroforestry practices an empirical analysis from tanzania abstract this paper investigates the economic relevance of sustainable behavior of agroforestry practices for smallholders using the example of firewood exploitation in rural tanzania three questions are addressed 1 to what extent do households behave sustainably regarding firewood extraction from agroforestry 2 which factors determine the likelihood of households practicing sustainable agroforestry 3 are sustainably behaving households better off in terms of income compared to households practicing unsustainable agroforestry the analysis is based on cross sectional data of 314 households a sustainability indicator shows that the share of sustainable households varies between 14 and 41 depending on the underlying wood growth rate the results of the logistic regression indicate that property rights regarding the ownership of agricultural land and environmental awareness increase the likelihood of sustainable firewood extraction empirical evidence from the quantile regression reveals that poorest households generate higher income if they extract firewood unsustainably the opposite is true for households of upper income percentiles thus the poor are likely to increase environmental degradation to generate more income causing a downward spiral of the poverty environment trap resulting in income losses in the long run households with a per capita income of 524 tzs or more manage their tree stocks sustainably

fuelling calorie intake decline household level evidence from rural india summary in india average calorie intake has declined even as real monthly expenditure has increased since cross sectional evidence suggests a positive relationship between the two variables the trend emerges as a major puzzle using household level data from four recent rounds of national sample survey data on consumption expenditure and a novel instrumental variable estimation strategy we find that rising expenditure on non food items is one of the factors that has led to the calorie intake decline we provide causal evidence for such a food budget squeeze in the case of one type of non food item viz expenditures on cooking fuel

the environmental impact of poverty evidence from firewood collection in rural nepal abstract we investigate determinants of household firewood collection in rural nepal using 1995 96 and 2002 3 world bank living standards measurement survey lsms data we incorporate village fixed effects endogenous censoring measurement error in living standards and heterogeneous effects of different household assets we find no evidence in favor of the poverty environment hypothesis the evidence for the environmental kuznets curve depends on the precise measure of living standards and time period studied firewood collections fall with a transition to modern occupations and rise with increasing population and household division the local interhousehold collection externality is negligible indicating that policy interventions are justified only by ecological considerations or nonlocal spillovers

effect of fuelwood scarcity and socio economic factors on household bio based energy use and energy substitution in rural ethiopia abstract in ethiopia biomass is predominantly utilized for household energy needs often using inefficient rudimentary stoves which cause adverse environmental and welfare effects this paper examined the contribution of biomass resources to rural household energy use and energy substitution the analysis applied the ordinary least square in the final stage estimation of fuelwood and overall biomass energy consumption by using predicted shadow prices the paper used tobit model to estimate charcoal and agricultural fuel consumption due to the presence of censoring an increase in fuelwood shadow price was associated with reduced household fuelwood consumption with price elasticity of 0 38 the cross price elasticity between fuelwood and agricultural fuels revealed no evidence of energy substitution which conforms to the findings of previous studies household access to electricity was associated with lower household biomass energy utilization but kerosene was not fuelwood substitute household energy use conformed to the fuel stacking or multiple fuel use concept but households preferred modern energy options as welfare increased in areas where modern energy is available this suggests that there is a promising prospect for fuel transition but access to modern energy and economic growth have key roles the findings suggest that a concerted policy effort is required that would help diversify rural livelihoods improve living standards and encourage economic growth encourage inter fuel substitution through improved modern energy access and afforestation to increase biomass supply

a ladder within a ladder understanding the factors influencing a household s domestic use of electricity in four african countries abstract according to the energy ladder hypothesis electricity is at the top of the energy ladder of household energy use that depends primarily on wealth status income and education levels of the users however it is often observed that households with higher income wealth and education levels do not use electricity for all domestic activities such as lighting heating and cooking creating a ladder within a ladder using a comprehensive data set from the living standard measurement study from four african countries ethiopia malawi tanzania and uganda covering 17 000 households this paper investigates the factors determining a household s adoption of electricity for lighting only and for lighting and cooking the results of a multinomial logit model and an ordered probit model show that demographic characteristics a household s wealth and human capital access to markets and remoteness greatly accelerate a household s use of electricity for light and cooking which provides evidence of a ladder within a ladder

energy consumption in rural china a household model for three villages in jiangxi province abstract in china fuelwood and coal are the most important energy sources for rural households in poor areas along with population and economic growth excessive fuelwood collection is a major cause of deforestation burning coal contributes to environmental problems such as air pollution acid rain and greenhouse gas emissions the purpose of this article is to analyze factors determining choice of energy source and labor input into fuelwood collection in poor forest rich regions and to provide policy recommendations on ways to affect these choices to this end a nonseparable household model reflecting choices in labor allocation and energy demand of rural households is estimated from available data for three villages in a poor forest rich region in jiangxi province southeast china innovative aspects of this article are the analyses of factors driving household substitution between forest and non forest fuels and of dissimilarities in household responses under different market access conditions

george bush versus al gore irreversibilities in greenhouse gas accumulation and emission control investment abstract this paper investigates the fundamental problem of mitigating the impacts of climate change in an environment of uncertainty and learning in particular the paper uses a stochastic version of nordhaus s dice model to show that the irreversibility of investment capital has a stronger effect than irreversibilities in climate change other than catastrophic effects the implications are that if abatement decisions are irreversible there should be less emission control today than would be optimal without taking learning into account and that policy makers should pursue control policies that are costlessly reversible a variant on the no regrets strategy

application of an almost ideal demand system aids to ethiopian rural residential energy use panel data evidence abstract it is well known that poor rural households in low income economies are reliant on traditional fuels to meet basic domestic energy needs but little is known about the specific underlying socio economic drivers of residential fuel choices in ethiopia i used the linear approximation almost ideal demand system laaids with normalized prices to compute expenditure elasticity and a multinomial logit model mlm to examine household fuel use the laaids model result showed that expenditure was elastic for modern fuels but inelastic for traditional fuels regression results from the mlm indicated that fuel choice behaviour of rural households could be more accurately described as fuel stacking behaviour as opposed to the energy ladder hypothesis in rural areas household fuel choice may be constrained by limited access to commercial fuels and efficient cook stoves supply dependency and affordability consumer preferences and a web of other intricate factors rural households had less incentive for fuel switching due to underlying factors and the availability of fuel wood without direct financial cost with continued deforestation and receding forests households are expected to develop inter fuel substitution and switching behaviour conditional on access to modern energy technologies

modeling the choice to switch from fuelwood to electricity implications for giant panda habitat conservation despite its status as a nature reserve wolong nature reserve china has experienced continued loss of giant panda habitat due to human activities such as fuelwood collection electricity though available throughout wolong has not replaced fuelwood as an energy source we used stated preference data obtained from in person interviews to estimate a random utility model of the choice of adopting electricity for cooking and heating willingness to switch to electricity was explained by demographic and electricity factors price voltage and outage frequency in addition to price nonprice factors such as voltage and outage frequency significantly affect the demand thus lowering electricity prices and increasing electricity quality would encourage local residents to switch from fuelwood to electricity and should be considered in the mix of policies to promote conservation of panda habitat 2002 elsevier science b v all rights reserved

household energy choices and fuelwood consumption an econometric approach using french data this study proposes an econometric analysis of household fuelwood demand in france the choice concerning the energy used for heating is modeled stressing the combination between one type of energy used as a main source and another one used as a back up this endogenous decision has an impact on fuelwood consumption and is taken into account to avoid biased estimates of price and income elasticities the results show that the choice of energy mix is determined by the income and the socio economic characteristics of households and that fuelwood consumption is price sensitive in the case where wood is the main source of energy

efficiency equity and regulation an optimal pricing model of bell canada this paper examines the optimality of telecommunications prices charged to residential users within quebec and ontatio optimality is evaluated from the standpoint of both efficiency and equity the underlying optimization model incorporates equity considerations through the distribution of welfare across individuals the model is simulated using structural information obtained from a multi input multi output cost and demand model of bell canada the results suggest that historic telecommunications prices are consistent with socially optimal prices when equity considerations are heavily weighted they are not consistent with pure efficiency ramsey prices efficacite equite et reglementation un modele de tarification optimale pour bell canada ce memoire examine l optimalite des tarifs imposes aux consommateurs usagers des services de telecommunication en ontario et au quebec l optimalite est evaluee en tenant compte a la fois de l efficacite et de l equite le modele d optimisation sous jacent tient compte de l equite en examinant la distribution de bien etre entre individus les exercises de simulation utilisent des renseignements de nature structurelle obtenus du modele de demande et de couts de bell canada developpe pour plusieurs intrants et plusieurs extrants les resultats obtenus suggerent que les tarifs imposes pour les services de telecommunication sont conformes historiquement avec les niveaux qu on peut considerer comme socialement optimaux quand les considerations d equite recoivent un poids considerable ils ne sont pas conformes cependant avec ce que dicterait une tarification d efficacite pure a la ramsey

food versus fuel examining tradeoffs in the allocation of biomass energy sources to domestic and productive uses in ethiopia rural households in ethiopia have limited options to meet their domestic energy needs because they lack access to modern fuels and technologies domestic use of certain fuel sources such as cow dung can hinder agricultural outcomes and productivity this article explores the tradeoffs between domestic and productive uses of biomass energy sources in the nile basin of ethiopia using a nonseparable farm household model where labor allocation to energy collection and farming are analyzed simultaneously we estimate a system of five structural equations using three stage least squares and find that the use of dung as a domestic fuel source has negative implications for the value of harvested crops while use of on farm fuelwood is associated with increased value of agricultural output on farm production of fuelwood appears to increase the value of crop output and provide labor savings by making fuelwood collection more convenient for households policy interventions to support the expansion of agroforestry and increase access to new energy efficient technologies are needed to ensure that agricultural productivity can be both increased and sustained

an energy pricing scheme for the diffusion of decentralized renewable technology investment in developing countries the purpose of this paper is to investigate price support for market penetration of renewable energy in developing nations through a decentralized supply process we integrate the new decentralized energy support renewable premium tariff to analyze impacts of tariff incentives on the diffusion of renewable technology in senegal based on photovoltaic and wind technologies and an assessment of renewable energy resources in senegal an optimization technique is combined with a cash flow analysis to investigate investment decisions in renewable energy sector our findings indicate that this support mechanism could strengthen the sustainable deployment of renewable energy in remote areas of senegal although different payoffs emerged profits associated with a renewable premium tariff are the highest among the set of existing payoffs moreover in analyzing impacts of price incentives on social welfare we show that price tariffing schemes must be strategically scrutinized in order to minimize welfare loss associated with price incentives finally we argue that a sustainable promotion of incentive mechanisms supporting deployment of renewable technology in developing nations should be carried out under reliable institutional structures the additional advantage of the proposed methodology is its ability to integrate different stakeholders producers investors and consumers in the planning process

factors determining household use of clean and renewable energy sources for lighting in sub saharan africa abstract the purpose of the current research is to examine the factors that influence household use of determinants of renewable and clean energy sources used for lighting purposes in africa using the data from the living standard measurement study lsms from three african countries ethiopia tanzania and malawi for this purpose the paper uses multinomial logit and ordered probit econometrics models the descriptive analysis reveals that rural households are dependent largely on kerosene and batteries for lighting their houses while electricity and batteries form a major source of energy for lighting urban households a small fraction of households uses solid fuels and solar as their source of energy for lighting econometric results show that female headed households are likely to adopt clean and renewable sources of energy compared to male headed households wealthier and more educated households are found to use electricity and solar energy for lighting while poorer households tend to use kerosene batteries and solid fuels empirical results indicated that the ethiopian households followed by malawian households are more likely to use clean sources of energy compared to tanzanian households