prices institutions and determinants of supply in the malian cotton sector cotton both a source of livelihood for millions of poor rural households and a major source of export revenues is a vital commodity for the economic and social development of mali inefficiencies in the malian cotton system at the ginnery and producers cooperative levels e g late payment to farmers and poorly functioning credit schemes have recently led to an important decline in supply threatening the sustainability of the sector using regional data from 1998 1999 to 2008 2009 this study aims to quantitatively assess the contribution of key determinants such as cotton prices and timely payment toward the downward trend in cotton area a dynamic supply model based on adaptive expectations and partial adjustment is employed to estimate the effects of prices and institutional factors such as credit recovery rates and date of payment to farmers on the malian cotton supply results show that supply responds significantly to cotton prices relative to cereal and fertilizer prices date of payment varies across agricultural cycles and late payment negatively influences land devoted to cotton low credit repayment rates create disincentives to grow cotton therefore the revitalization of the malian cotton sector depends upon getting both prices and institutions right

nonpecuniary benefits to farming implications for supply response to decoupled payments we develop a household model wherein farmers allocate labor to maximize utility from leisure consumption and nonpecuniary benefits from farming the model shows that farmers with decreasing marginal utility of income respond to higher decoupled payments by decreasing off farm labor and increasing farm labor resulting in greater agricultural output we then estimate the difference between farm and off farm returns to labor using data from three nationally representative farm household surveys the finding of a large on farm off farm wage differential provides compelling evidence of substantial nonpecuniary benefits from farming

comparing optima do simplifying assumptions affect conclusions consider a family of maximization models in which the optimum trades off beneficial and costly effects then comparative statics derived under many kinds of simplifying assumptions about the benefits technology are also true for general convex and nonconvex technologies for example any comparative statics conclusion about investment by a risk averse decision maker under uncertainty that holds when expected returns are described by a general linear function also holds for an arbitrary nonlinear expected return function

energy consumption and urban sprawl evidence for the spanish case residential electricity consumption constitutes one of the largest sources of spanish final energy demand to improve electricity savings policies oriented towards efficiency in residential consumption such as replacement of appliances or the construction of nearly zero energy buildings have been suggested and implemented however the potential relevance of urban structural characteristics such as the increase in detached houses in sprawling residential areas has not often been considered the aim of this research is to analyse the relevance of living in a detached house located in a dispersed urban area to household electricity consumption thus an electricity consumption model is estimated by using household socioeconomic variables and including urban characteristics as its determinants such us the level of urban agglomeration or whether families live in detached sprawling homes the model is estimated by using 2014 household budget survey hbs microdata and applying ordinary least squares ols as well as quantile regressions qr as econometric procedures endogeneity problems are corrected by means of instrumental variables the results confirm that living in a detached house significantly increases electricity consumption whereas urban agglomerations have the opposite effect sprawl is occurring rapidly in spanish cities and according to our results it could constitute a relevant source of increase in electricity demand in the following years

a theorem on portfolio separation with general preferences abstract necessary and sufficient restrictions upon arbitrary utility functions for portfolio separation for any degree are derived for complete markets generalizing the expected utility theorems of cass and stiglitz j econ theory2 1970 122 160 portfolio separation is shown to be nearly synonymous with lewbel s econometrica59 1991 711 730 definition of demand rank which is characterized using standard duality methods journal of economic literature classification numbers g11 c43 d11

from linear fuel switching to multiple cooking strategies a critique and alternative to the energy ladder model abstract promoting sustainable development requires evaluating the technical and policy options that will facilitate the adoption and use of energy efficient and less polluting cooking stoves and practices the transition from traditional to modern fuels and devices has been explained by the energy ladder model that suggests that with increasing affluence a progression is expected from traditional biomass fuels to more advanced and less polluting fuels in this paper we evaluate the energy ladder model utilizing data from a four year 1992 96 case study of a village in mexico and from a large scale survey from four states of mexico we show that an alternate multiple fuel model of stove and fuel management based on the observed pattern of household accumulation of energy options rather than the simple progression depicted in the traditional energy ladder scenario more accurately depicts cooking fuel use patterns in rural households the multiple fuel model integrates four factors demonstrated to be essential in household decision making under conditions of resource scarcity or uncertainty a economics of fuel and stove type and access conditions to fuels b technical characteristics of cookstoves and cooking practices c cultural preferences and d health impacts this model also allows better estimates of the expected fuelwood demand and indoor air pollution in rural households

effects of agricultural market policy on crop production in china this paper investigates the effects of chinese market policy on crop production in the reform process after a brief review of the policy changes due to the reform the theoretical significance of chinese market policies for crop production is demonstrated diagrammatically it is shown that under the current market system the production of main crops is significantly influenced by both market and quota prices while relatively high quota reduces the influence of market prices on production relative price changes between competing crops will lead to shifting farmers cultivation preferences if inputs are constant empirical analysis based on cross section data for the period 1985 1997 from the province of zhejiang confirms these hypotheses the effects of policy variables however prove to be crop specific if the potential of crop production in china is to be better used an even more market oriented agricultural policy is required

economic and demographic determinants of household energy use in turkey this paper analyzes several economic and socio demographic factors which affect households energy choices in turkey the data is obtained from the household budget surveys hbs conducted by the turkish statistics institute tuik the multinomial logit model is used to identify households energy choices the most important finding of the study is that monthly income of households or household welfare in general has significant effect on energy choices it is also important to note that ages of persons have influence on energy choices indeed health concerns easiness in use was found as criteria referred to particularly by household heads at age 50 and over when making energy choices as far as settlements are concerned the most salient characteristic of urban dwellers vis a vis rural dwellers is their dominant preference for natural gas while rural dwellers have their choice for more conventional fuels

on measuring energy poverty in indian households summary the relationship between energy and poverty is obvious and goes both ways recognizing this this paper provides a short overview of different approaches to measuring energy poverty it then presents a novel two dimensional measure of energy poverty and energy distribution that combines the elements of access to different energy types and quantity of energy consumed an assessment of the extent of energy poverty and changes in energy distribution pattern are analyzed by applying this measure to indian household survey data for 1983 2000 the analysis shows a significant reduction in the level of energy poverty and a rapidly developing subcontinent the new measure is a good complement to conventional monetary measures and is general enough to be applied to other developing countries

dynamic agricultural supply response under economic transformation a case study of henan china during the dramatic economic transformation in the last few decades food demand in china has expanded due to rapid urbanization dietary change and steady population growth at the same time a decline in available land for agriculture has made grain selfsufficiency a major goal of chinese agriculture policy a considerable challenge the governmenthasimplementedcomprehensivepolicies to encourage domestic agricultural production including eliminating agricultural taxes and providing direct subsidies to farmers it remains unclear whether these policies are effective in stimulating food production there isanurgentneedforknowledgeonagricultural supply response to changes in prices policies and rural infrastructure in china which can guide policy formulation in the process of economic transformation if agriculture is highly responsive policy induced changes in farmers behavior can be effective in increasing production and ensuring long term food security in the country

modeling supply response in a multiproduct framework the paper models multiproduct supply response in agriculture and tests key assumptions traditionally maintained in supply response studies the technology is approximated by a restricted profit function the properties of the restricted profit function are imposed during estimation the hypothesis that maintains the existence of output price and quantity indexes that satisfy the adding up property is rejected the existence of individual production functions for each output is also rejected unless joint production is permitted the estimates of responsiveness of a particular commodity to changes in own price or prices of competing outputs are likely to be considerably understated

are the energy poor also income poor evidence from india abstract the energy poverty line is defined as the threshold point at which energy consumption begins to rise with increases in household income this approach is applied to cross sectional data from a comprehensive 2005 household survey representative of both urban and rural india the objective is to determine if the energy poor are also income poor and whether and how energy policies help reduce energy poverty independent of income the findings suggest that in rural areas some 57 of households are energy poor versus 22 that are income poor but in urban areas the energy poverty rate is 28 compared to 20 that are income poor that is energy policies are expected to play some roles in mitigating energy poverty we find that reducing energy poverty requires not only support for rural electrification but also more use of modern cooking fuels such as lpg while income growth matters a combination of energy related programs can play an independent and substantial role in reducing energy poverty

global growing area elasticities of key agricultural crops estimated using dynamic heterogeneous panel methods we estimate the short and long run global response of corn soybeans wheat and rice growing areas to output price changes allowing responses to vary across countries using methods from the panel time series literature our estimates of growing area response are considerably lower than estimates obtained using more traditional models previous findings appear biased due to the assumption of homogeneous response across countries our aggregate estimates of short and long run elasticities of four crop growing areas with respect to average price are 0 024 and 0 143 respectively crop specific results indicate that both corn and soybean growing areas are generally more responsive than wheat and rice for corn and soybeans the long run own price growing area elasticities are 0 274 and 0 793 respectively the long run own price elasticities for wheat and rice are 0 279 and 0 045 respectively the short run own price elasticities for corn and soybeans are 0 133 and 0 199 respectively which are higher than wheat 0 037 and rice 0 00001

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

demand for cooking fuels in a developing country to what extent do taste and preferences matter overreliance on biomass energy such as firewood and charcoal for cooking in developing countries has contributed to high rates of deforestation and resulted in substantial indoor pollution which has negatively impacted the health of many individuals however the effectiveness of public policies aimed at encouraging households to switch to cleaner fuels such as liquefied petroleum gas lpg and kerosene hinges on the extent to which they are mentally committed to specific fuels using data on four cooking fuels charcoal firewood lpg and kerosene from the ghana living standards survey we found strong evidence that the most preferred fuel is lpg followed by charcoal with kerosene the least preferred in addition with the exception of kerosene that has price elastic demand the price elasticities of demand for the fuel types examined are inelastic this finding suggests the so called fuel ladder is not robust

worldwide acreage and yield response to international price change and volatility a dynamic panel data analysis for wheat rice corn and soybeans this study estimates a worldwide aggregate supply response for key agricultural commodities namely wheat rice corn and soybeans by employing a newly developed multi country crop and calendar specific seasonally disaggregated model with price changes and price volatility applied accordingly the findings reveal that although higher output prices serve as incentives to improve global crop supply as expected output price volatility acts as a disincentive depending on the crop the results show that own price supply elasticities range from about 0 05 to 0 40 output price volatility however has negative correlations with crop supply implying that farmers shift land other inputs and yield improving investments to crops with less volatile prices simulating the impact of price dynamics since 2006 we find that price risk has reduced the production response of wheat in particular and to a lesser extent rice thus dampening price incentive effects the simulation analysis shows that the increase in own crop price volatility during the 2006 2010 period has dampened yield by about 1 2 for the crops considered

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

energy for sustainable development a case of developing countries abstract today there are 1 4 billion people around the world that lack access to electricity some 85 of them in rural areas without additional dedicated policies by 2030 the number of people drops but only to 1 2 billion some 15 of the world s population still lack access the majority of them living in sub saharan africa the number of people relying on the traditional use of biomass is projected to rise from 2 7 billion today to 2 8 billion in 2030 addressing these inequities depends upon international recognition that the projected situation is intolerable a commitment to effect the necessary change and setting targets and indicators to monitor progress a new financial institutional and technological framework is required as is capacity building in order to dramatically scale up access to modern energy services at the local and regional levels in this paper we discussed the energy situation of the developing countries for sustainable development

value data and the bennet price and quantity indicators abstract we derive value based bennet indicators expressed in terms of revenues and expenditures values and relative prices rather than prices and quantities we then show how relative price information is recoverable from value data when agents are rational

the role of income in energy consumption behaviour evidence from french households data the main purpose of this paper is to characterise quantitatively the impact of income on household energy consumption in the residential and transport sectors starting from the data collected in a paper survey we analyse the extent of the constraint experienced by households in terms of equipment purchasing behaviour and daily energy consumption this analysis shows that the least well off households are particularly constrained since the share of their budget represented by these energy services is very large 15 25 and this corresponds to a level of energy service well below that of the better off households the case of space heating shows a factor of 2 in terms of level of comfort achieved between the extreme 10 percentiles these households also face a strong capital constraint for equipment purchases this leads either to a large increase in the required rate of return or to a reduction in the proportion of households that are prepared to replace their equipment earlier the least well off households are thus doubly constrained since it is more difficult for them to invest in our opinion it is crucial to take into account this observation in the context of political measures aimed at reducing households co2 emissions

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

transactions costs and agricultural household supply response we develop and estimate a model of supply response when transactions costs create a situation where some producers buy others sell and others do not participate in markets we present two rationales for why producing households may have different relationships to the market proportional and fixed transactions costs using data on mexican corn producers we estimate an empirical model that allows for separate tests of the significance of both types of transactions costs revealing that both fixed and proportional transactions costs matter for the estimation the results provide consistent estimates of supply elasticity and measures of the relative importance of factors determining both proportional and fixed transactions costs

consumers surplus as an exact and superlative cardinal welfare indicator this article shows that the bennet bowley consumer surplus measure is an exact measure of allais disposable surplus if the consumer s utility function is of the translation homothetic generalized quadratic form the bennet bowley consumer surplus measure therefore is a superlative cardinal welfare measure for the entire class of translation homothetic preferences because the exactness results in this article apply for cardinal welfare measures they can be meaningfully aggregated across consumers to make aggregate welfare comparisons

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

dual approaches to the analysis of risk aversion we present a dual formulation of choice under uncertainty based on a few simple assumptions about preferences it is shown that the additive separability restriction on preferences key to expected utility theory can be dropped with little loss of analytic power for a broad class of choice problems dual risk premiums are characterized and it is shown that placing various invariance restrictions on them leads naturally to generalizations of the concepts of cara crra and lrt familiar from expected utility theory each of these generalizations conforms to a notion of homotheticity

a more robust definition of subjective probability the goal of choice theoretic derivations of subjective probability is to separate a decisionmaker s underlying beliefs subjective probabilities of events from their preferences attitudes toward risk classical derivations have all relied upon some form of the marschak samuelson independence axiom or the savage sure thing principle which imply that preferences over lotteries conform to the expected utility hypothesis this paper presents a choice theoretic derivation of subjective probability in a savage type setting of purely subjective uncertainty which neither assumes nor implies that the decisionmaker s preferences over lotteries necessarily conform to the expected utility hypothesis copyright 1992 by the econometric society

household energy preferences for cooking in urban ouagadougou burkina faso abstract an extensive survey on household expenditures in ouagadougou the capital of burkina faso was used to analyze the factors determining urban household energy choices using a multinomial logit model wood energy remains the preferred fuel of most urban households in the country though rational the choice is not sustainable as it portends a threat to the savanna woodlands and the economy many important policies have been adopted by public authorities to minimize household wood energy consumption and to substitute it by alternative fuel despite the magnitude of all these policies the depletion rate of the forest resource is increasing a kind of inertia is thus observed for household preferences for cooking fuel this model analyzes the sociological and economic variables of household energy preferences for cooking in ouagadougou the analyses show that the inertia of household cooking energy preferences are due to poverty factors such as low income poor household access to electricity for primary and secondary energy low house standard household size high frequency of cooking certain meals using woodfuel as cooking energy the descriptive analyses show that the domestic demand for wood energy is strongly related to household income the firewood utilization rate decreases with increasing household income in other words this fuel appears as a transition good for these households which aim for other sources of energy for cooking that are more adapted for urban consumption this implies that a price subsidy policy for liquid petroleum gas lpg and its cook stoves could significantly decrease the utilization rate of wood energy

on the consumer value of complementarity a benefit function approach the article develops a conceptual model of the consumer value of complementarity and illustrates its usefulness in an application to fisheries complementarity arises when some goods have a positive effect on the marginal value of other goods we propose a measurement of the value of complementarity based on the benefit function our econometric analysis of fish consumption in italy examines these issues with special attention given to dynamics our results show that while short run fish demand is characterized by substitution relationships complementarity does develop in the intermediate run and in the long run copyright 2007 oxford university press

estimating supply response in the presence of farm programs previous empirical research on crop supply response has given insufficient attention to the fundamentally different nature of supply response under farm programs versus competitive markets a simple theoretical model is presented which highlights the program participation option in the farmer s acreage allocation decision the model also provides the basis for different expected supply elasticities under free market and farm program regimes for corn and soybeans econometric supply estimation for corn belt states for 1948 80 using a temporally disaggregated approach confirms a greater supply elasticity for corn and a lower supply elasticity for soybeans under acreage restricting feed grain programs

impact of off farm income on household energy expenditures in china implications for rural energy transition abstract this study examines the impact of off farm income on rural household energy expenditures paying special attention to clean energies such as electricity and gas and non clean energy such as coal we use instrumental variable approaches to address the endogeneity issues of off farm income and analyze household survey data collected from rural gansu henan and shandong provinces of china econometric results show that off farm income promotes rural energy transition in particular off farm income significantly increases both electricity and gas expenditures but decreases coal expenditure of rural households further analyses reveal that the energy transition effects generated by off farm income are more pronounced for households in shandong where the economy is relatively better developed relative to henan and gansu our findings highlight the importance of income diversification through off farm activities by farm households to enhance clean energy accessibility and boost sustainable rural economic development

linear risk tolerant invariant risk preferences this note identifies the class of preferences which simultaneously satisfy invariance two fund portfolio separation and linear risk tolerance it also considers the implications for asset demand and asset pricing of this class of preferences c 2004 elsevier b v all rights reserved

on marginal risk behavior this paper examines marginal risk behavior in a decision theoretic setting that is sufficiently general to accommodate any decision making model representable by a certainty equivalent the analysis shows that risk aversion in its usual sense is a special case of marginal risk aversion associated with mean preserving changes in gambles thus marginal risk behavior and risk behavior are not inherently different rather they manifest similar behavior evaluated at different gambles the paradox of marginal risk loving risk averters arises from mixing definitions of an increase in risk

a definition of uncertainty aversion a definition of uncertainty or ambiguity aversion is proposed it is argued that the definition is well suited to modelling within the savage as opposed to anscombe and aumann domain of acts the defined property of uncertainty aversion has intuitive empirical content behaves well in specific models of preference multiple priors and choquet expected utility and is tractable tractability is established through use of a novel notion of differentiability for utility functions called eventwise differentiability

the role of energy productivity in u s agriculture abstract this paper investigates the role of energy on u s agricultural productivity using panel data at the state level for the period 1960 2004 we first provide a historical account of energy use in u s agriculture to do this we rely on the bennet cost indicator to study how the price and volume components of energy costs have developed over time we then proceed to analyze the contribution of energy to productivity in u s agriculture employing the bennet bowley productivity indicator an important feature of the bennet bowley indicator is its direct association with the change in normalized profits thus our study is also able to analyze the link between profitability and productivity panel regression estimates indicate that energy prices have a negative effect on profitability in the u s agricultural sector we also find that energy productivity has generally remained below total farm productivity following the 1973 1974 global energy crisis

first order risk aversion and the equity premium puzzle abstract this paper integrates yaari s dual theory of choice under uncertainty into a multiperiod context and examines its implications for the equity premium puzzle an important property of these preferences is that of first order risk aversion which implies in our model that the risk premium for a small gamble is proportional to the standard deviation rather than the variance since the standard deviation of the growth rate in aggregate consumption is considerably larger than its variance the model can generate both a small risk free rate and a moderate equity premium