an assessment of the current structure of food demand in urban china we evaluate the current structure of food demand in urban china by using household expenditure survey data from five provinces two complementary analyses are undertaken first an aggregate analysis based on a fractional logit model is used to examine how households allocate food expenditures across the food at home fah and food away from home fafh categories this is followed by a disaggregated analysis of how households allocated their fah expenditures across 12 commodity categories a quadratic almost ideal demand system quaids is used we find evidence of significant food purchase substitution and complementarity

demand for rural tourism the effects of quality and information the development of rural tourism is regarded as a promising diversification strategy especially for lagging and mountainous areas of the european union research concerning the demand and or supply of rural tourism services has been limited within the agricultural economics domain despite the significance attached to rural tourism by various rural development policy measures and initiatives the article examines the expenditure behavior of rural tourists within a framework of demand for composite heterogeneous goods the proposed framework captures the quality of the tourism experience as the commodity s unit value a quantifiable economic variable examines its effects on expenditures and allows for the estimation of elasticity in prices regarding expenditure and quantity empirical analysis is facilitated by a survey recording the expenditure behavior of 465 tourists in two rural and lagging areas of greece the quality of the tourism experience is significantly and positively affected by the income the source from which information about the trip is retrieved internet newspapers as well as general press and special travel press and by the amount of information sought by the consumer prior to the trip in turn the quality of the tourism experience is the major endogenous factor that positively influences expenditures for rural tourism further research is needed before evidence provided in this work can be used to draw policy conclusions and recommendations

organic labelling private label and u s household demand for fluid milk abstractthe u s fluid milk market has been experiencing two trends in the recent decade the fast growth of private label milk and organic milk using the data from nielsen homescan panel we estimate a censored demand system to study the demand relations among types of milk differentiated by brand types and organic status we find that sociodemographic factors still play important roles in household choice of milk types and fluid milk as a whole is an inferior good moreover as income increases households are more likely to shift from buying conventional milk to organic milk and from private label conventional milk to branded conventional milk as indicated by the asymmetric cross price elasticities corresponding implications for milk producers and marketers are discussed

extrinsic versus intrinsic problems of agricultural cooperation anti incentivism in tanzania and china peasant willingness to engage in collective farming and the efficiency of collective farms once established may be preconditioned on local self determination participatory control discriminating work incentives and external manoeuvrability in the absence of such preconditions whether or not there exist economies of scale sufficient to offset effectively minimised incentive problems cannot be determined anti incentivism bureaucratic controls and extractive external environments are identified as factors inhibiting successful collective farming in both tanzania and china explanations of these tendencies in the two countries are sought in their political economies and ideological structures

how do scholars approach the circular economy a systematic literature review abstract circular economy ce aims to overcome the take make dispose linear pattern of production and consumption proposing a circular system in which the value of products materials and resources is maintained in the economy as long as possible in recent years there has been a proliferation of scholars publications on the topic this study presents the results of a systematic literature review exploring the state of the art of academic research on ce the paper examines the ce body of literature with a systematic approach to provide an exhaustive analysis of the phenomenon with rigorous and reproducible research criteria the revisited material consists of 565 articles collected through the web of science and scopus databases and has been evaluated using specific structural dimensions to group literature into analytical categories starting from being a concept studied in connection with industrial ecology ce has slowly acquired its independent role in academic research framed mainly into environmental sustainability related studies as a result of policies implementation academic production is mainly concentrated in china and europe employing tools and methods for modelling processes and supporting decision making for ce implementation e g life cycle assessment and material flow analysis ce studies follow three main lines of action the first aims to change the social and economic dynamics at macro and administrative level the second to support firms in circular processes implementation at micro level to spread new forms of consumption and product design the third developed at meso level discusses industrial symbiosis experiences ce is associated with a variety of concepts and waste management emerges as the most relevant sub sector ce is also strongly connected with the concept of sustainability proposing ways to operationalize its implementation at the environmental and economic level while scholars only marginally consider social and institutional implications the most explored practices are those related to cleaner production aiming at reducing environmental impact and waste production along the life cycle of a product and optimizing the performance and efficiency of processes conversely studies on ce may devote greater attention to strategies for social and institutional changes able to transform the upstream process of production and consumption considering business model strategies scholars mainly focus on studying closing material loops strategy while slowing the loops which requires a radical change of consumption and production patterns is only marginally included with respect to ce implementation this study s findings highlight ce as an evolving concept that still requires development to consolidate its definition boundaries principles and associated practices

eco efficiency analysis of power plants an extension of data envelopment analysis abstract in public discussion on environmental policy the notion of eco efficiency is often used the joint production of goods and undesirable outputs such as pollutants which may not be freely disposable without costs causes difficulties to measure the overall performance of the firm because of the absence of market prices for the undesirable outputs we are not able to estimate the environmental costs some of the measurement and evaluation difficulties can be overcome by employing data envelopment analysis dea as the efficiency measurement vehicle we propose the use of two different approaches in the first approach we start by decomposing the problem into two parts 1 the problem of measuring technical efficiency as the relation of the desirable outputs to the inputs and 2 the problem of measuring so called ecological efficiency as the relation of the desirable outputs to the undesirable outputs separately those two efficiency indicators are then combined in the second approach we treat pollutants as the inputs in the sense that we wish to increase desirable outputs and decrease pollutants and inputs the approaches are applied to the problem of measuring the efficiency of 24 power plants in a european country

household composition and food expenditures a cross country comparison abstract in the analysis of food expenditures use of household member counts as an explanatory variable assumes each member has the same marginal food expenditure impact in our analysis of latin american food expenditures we reject this assumption via the estimation of endogenously determined adult equivalence scales that vary by household member gender and age a series of hypothesis tests indicate significant differences not only in the male versus female equivalence scales but also across country with the use of such equivalence scales in the definition of per capita expenditures we find significant differences in the distributions implying substantially different poverty rankings

a microeconometric model analysis of us consumer demand for alcoholic beverages this paper discusses the specification and estimation of a two stage budgeting consumer demand for alcoholic beverages using 1987 88 usda individual and household food consumption survey data the upper level first stage budgeting decision is modelled via a gamma tobit model the lower level second stage budgeting allocates alcohol expenditure via a synthetic demand system for beer spirits and wine the synthetic system is constructed via a normalized linear combination of the level rotterdam cbs and an aids equivalent model data on individual three day alcohol consumption from the individual food intake survey are used for analysis while price and household characteristics information are obtained from the house hold food intake survey the results show that some individual and household characteristic variables as well as economic variables have significant impacts on consumer demand for alcoholic beverages

the impact of changes in household vacation expenditures on the travel and hospitality industries two large tourism industries travel and hospitality are strongly affected by changes in household demand for vacations in recent years rising income and declining prices per unit of quality have led to changes in patterns of household vacation consumption to understand the impact of these changes on the travel and hospitality industries we develop a theoretical model distinguishing between travel and on site expenditures and apply it to israeli data we find that under certain circumstances the changes in income and prices are responsible for a shift toward multiple short vacations this trend can be a boon to the travel industry but a disadvantage for the hospitality industry both industries are expected to face a rise in the demand for high quality products

on measuring child costs with applications to poor countries the theoretical basis for measuring child costs is discussed and detailed consideration is given to two straightforward procedures for calculation engel s food share method and rothbarth s adult good method each of these methods embodies different definitions of child costs so that the same empirical evidence can generate quite different estimates depending on the method used it is shown that true costs are generally overstated by engel s method and understated by rothbarth s procedure although the latter unlike the former can provide a sensible starting point for cost measurement our estimates from sri lankan and indonesian data suggest that children cost their parents about 30 40 percent of what they spend on themselves

quality quantity and spatial variation of price this paper develops and implements a method for estimating price elasticities of demand using cross sectional household survey data geographically clustered households report unit values which when corrected for quality effects and for measurement error indicate the underlying spatial variation in prices and can be matched to variation in demand patterns a simple model of quality choice is proposed while the correction for measurement error exploits the clustered design of such surveys data from a 1979 household survey from the ivory coast are used to estimate price elasticities for beef meat fish cereals and starches copyright 1988 by american economic association

prices and quality effects in cross sectional demand analysis a conceptual clarification of the sources and meaning of cross sectional price variability is used to motivate a theoretical and econometric framework for the estimation of cross sectional demand functions quality effects are distinguished from supply related price variability to identify cross sectional demand for disaggregated food commodities an empirical application using data from the 1977 78 nationwide food consumption survey indicates that parameter differences resulting from a failure to adjust cross sectional prices for quality effects are likely to be small for relatively homogenous disaggregated food commodities in demand analysis with cross sectional household budget data it is usually assumed that prices are constant allen and bowley prais and houthakker george and king given this assumption engel functions are estimated where expenditure or quantity is regressed on income or total expenditures family size and other demographic characteristics the assumption that cross sectional price effects are absent or are captured adequately by spatial and temporal dummy variables has not been evaluated empirically whether cross sectional price effects can be treated in this manner has implications for the specification of cross sectional demand functions as well as the estimation of engel functions there is a considerable literature on estimating price elasticities with cross sectional data most of the applications utilize timeseries cross sectional data annual or quarterly household consumption surveys and

a latent variable model of consumer taste determination and taste change for complex carbohydrates despite evidence that aggregate consumption of complex carbohydrates has risen over the last decade food consumption surveys suggest that fewer households are consuming less bread pasta rice potatoes and corn this paper estimates systems of complex carbohydrae demand using cross sectional data from 1977 78 and 1987 88 in order to explain this paradox changes in demand that are not explained by changes in prices or income are explained by variations in taste because tastes cannot be directly observed the paper uses a multiple indicator and multiple cause mimic model to construct a suitable proxy variable in the mimic approach the indicators are residuals from a household demand function that includes prices and incomes as explanatory variables while household and demograhic proxies are cause variables the objectives in applying the mimic model are to determine the effect of consumer tastes on complex carbohydrate demand and comparing cross sectional survey data from two different periods

variation in retail costs for fresh vegetables and salty snacks across communities in the united states abstract households living in different communities pay different amounts of money for food food costs depend on whether a household lives in an urban community or in a locality with a high incidence of poverty among other factors this study focuses on spatial variation across the united states in the retail costs for fresh vegetables and salty snacks findings reveal that the major economic and demographic characteristics of a household s community affect its costs for these two types of foods differently however households are likely to pay more money for salty snacks in communities where fresh vegetables also cost more

estimation of demand functions using cross sectional household data the problem revisited a procedure that corrects for selectivity bias is proposed to estimate demand functions using cross sectional data under the assumption that prices vary across households this procedure which extends the work by cox and wohlgenant includes a two equation system of expenditure and unit value functions this model is applied to household expenditures for beef steaks and roasts

transition and enterprise restructuring the development of individual farming in romania economic reforms have induced enterprise restructuring in transition countries in agriculture the most dramatic form of restructuring is the break up of state and collective farms into individual farms the development of individual farming varies strongly between countries regions and households this paper uses household level data from a 1996 survey in romania to analyze which household and regional characteristics determine the shift to individual farming individual farming is influenced by several household characteristics such as the human capital education age farming experience physical capital endowments ownership of land buildings machinery livestock and access to other finance sources off farm wages pensions furthermore environmental factors such as infrastructure local access to inputs and the pre reform importance of individual farming in the region all affect the development of individual farming

farm strategy self selection and productivity can small farming groups offer production benefits to farmers in post socialist romania abstract this paper addresses two questions why are romanian farmers continuing to place land in cooperative forms of farming when theory suggests that private farming is more productive and are there efficiency gains to be had from cooperative farming endeavors results from an econometric selection model suggest that smaller endogenously developed farming cooperatives such as family societies provide benefits over private farming strategies under certain conditions this paper questions the wholesale rejection of cooperation around production and challenges policy to move away from the typically dichotomized presentation of agrarian structure as being a trade off between private small scale farming and large scale collective farming

quality variation and quantity aggregation in consumer demand for food viewing the problem of quality variation in consumer demand for food as a problem of valid aggregation over goods leads to new insights the simple sum of physical quantities used as the measure of demand in the quality literature is found to be a theoretically arbitrary and potentially misleading measure of demand when goods are heterogenous alternative measures of demand derived from restrictions on quality variation consumer preferences or relative prices are investigated a hypothetical example illustrates the use of a hicksian composite commodity assumption the empirical as well as conceptual merits of the various measures are discussed the usual assumption made about prices in a cross section analysis of household food expenditures is that all households are facing the same prices estimation of price elasticities of demand is commonly left to time series researchers who get price information from intertemporal indices recently however there has been renewed interest in the otential of cross section analysis for estimation of price elasticities of demand for food especially when surveys collect data on both household expenditures for food items and on the physical quantities purchased

working wives and food away from home the box cox double hurdle model household expenditures on food away from home are analyzed with the use of the bls 1989 consumer expenditure survey parameterization and distributional assumptions of cragg s double hurdle model are generalized for this purpose and the resulting model outperforms the more traditional ones results suggest households with working wives and those with higher income are more likely to consume food away from home and also to consume more than others wife s age and household size increase the conditional level of consumption education has conflicting effects on probability and conditional level of consumption

at home consumption of cheese a purchase infrequency model for many commodities zero purchases are recorded in household budget surveys even though positive consumption occurs this may reflect a survey period that is shorter than the purchase cycle the present study estimates a purchase infrequency model for cheese using the 1987 bls consumer expenditure survey appropriateness of the tobit specification is examined along with the assumption of independence of the two stage expenditure decision process applied consumption analyses often use household budget surveys with little concern as to survey period length relative to the length over which consumption can occur many of these analyses use the tobit model to account for censoring associated with use of this type of model are underlying assumptions that first the same stochastic process affects both purchase decisions and consumption levels and second a zero value of the dependent variable represents a true comer solution however when the commodity in question has a purchase cycle longer than the survey period length a zero expenditure level may not correspond to zero consumption and the tobit specification may be inappropriate blundell and meghir p 197 as a commodity cheese may exhibit characteristics precluding use of a tobit demand model for many cheese varieties consumption may occur many weeks after purchase as evidence the 1972 and 1987 consumer expenditure surveys report that 48 and 42 of surveyed households respectively had purchased cheese over a one week survey period in contrast the 1977 usda household food consumption survey indicates over 75 of surveyed households had consumed cheese at home over a one week period this large difference

modeling physical quantities of food and nutrients consumed from aggregate data with an application to finland anticipating the impact of changes in economic incentives on dietary quality and nutritional health requires knowledge of how physical quantities of food consumed respond to price and income variations a problem arises however because physical quantities are 1 not consistent aggregates in demand models and 2 not measured at final retail level in national statistics the article develops a solution by establishing explicitly the theoretical link between composite demand and physical quantities from which a novel empirical approach to the estimation of nutrient elasticities is derived it is applied to finnish aggregate data from the national accounts and food balance sheets over the 1975 2006 period and the results are used to assess the potential effectiveness of several incentive based nutritional policy instruments jel classifications i10 q11 q18

towards a national circular economy indicator system in china an evaluation and critical analysis abstract it is widely acknowledged that china s economic miracle has been achieved at the expense of its natural capital and environment in order to deal with this problem the circular economy ce has been chosen as a national policy for sustainable development national laws and regulations have been enacted to facilitate the implementation of ce and national ce demonstration projects have been initiated such that national benchmarking activities could be completed china is the first country to release nationally focused ce indicators so that objective and credible information on the status of ce implementation can be recognized these ce indicators are valuable metrics for policy and decision makers and can help achieve ce goals and outcomes this unique indicator system has not been communicated to international communities this paper aims to more broadly introduce this unique national ce indicator system china s ce efforts are first detailed with various provisions of the national indicator system a critical analysis of such an indicator system is presented we show that certain benefits can be gained but substantive revision is also needed due to the lack of a comprehensive set of sustainability indicators which should include social business indicators urban industrial symbiosis absolute material energy reduction and prevention oriented indicators concerns related to barriers on implementation are also presented in this paper the knowledge gained from chinese efforts on ce indicators are valuable to both developed and developing nations seeking to implement sustainable development measures within their regulatory policies

the demand for food quality in rural china many studies of food demand do not use actual prices but unit values obtained by dividing expenditures by the quantity consumed this can bias empirical analyses because unit values are not exogenous market prices they reflect household food quality choices within each food category this article develops a framework for assessing the resulting bias in income and price elasticities of demand and applies the framework to data for rural china empirical results indicate that households in rural china tend to consume higher quality food as income increases with a greater sensitivity to income for basic foods than for luxury foods copyright 2009 oxford university press

evaluation on china s forestry resources efficiency based on big data abstract the development of china s forestry resources has never been more challenging due to serious problems such as shortage inferiority and uneven distribution of forestry resources therefore the study and evaluation of china s forestry resources has a great significance to improve efficiency and ensure the sustainable development of the forestry resource meanwhile the vast territory huge population and widespread forest landscape of china have led to the numerous indexes and the huge data to perform the research and evaluation accurately this paper utilized the big data theory to analyze the relevant data of china s forestry resources this study collected the data from 31 inland provinces and municipalities of china from 2005 to 2013 after which we carefully examined economic social and ecological factors to choose assessment indexes and processed data accordingly firstly we performed a cross sectional dataset analysis using the method of data envelopment analysis to investigate the forestry resources efficiency in 31 inland provinces and municipalities of china in years 2008 2012 and 2013 secondly we analyzed time series data of the 31 inland provinces and municipalities from 2005 to 2013 using the malmquist total factor productivity index method our results showed the dominant factor that restraining forestry resources efficiency for the 31 inland provinces and municipalities is the implemented technology so we suggest increasing the investment in science and technology to improve the overall efficiency of forestry resources along with improvement of operation and management by relevant administrative departments to improve technology utilization the innovation of this paper lies in the dynamic process of analysis

an inverse demand analysis with introduction of quality effects an application to spanish consumption of fruit and vegetables this article analyzes consumer preference for fruit and vegetables when by using time series with socioeconomic characteristics of households there can be seemingly unobserved quality effects which are increased by aggregation the changes in spanish demand for fresh and processed fruit and vegetables over the period 1987 2000 are discussed following previous tests and analyses quantities are taken as predetermined and prices as matching the offer conditions thus quality effects based on the nutritional and or health value of the product are estimated from the error terms associated with the functions of the unit values quality variables are introduced as taste shifters in the inverse demand system laitinen theil model the results show the positive effects of quality differences on the normalized price for the group of products through own quality flexibilities and the negative effects between fresh and processed products through cross quality flexibilities

growth in global materials use gdp and population during the 20th century the growing industrial metabolism is a major driver of global environmental change we present an assessment of the global use of materials since the beginning of the 20th century based on the conceptual and methodological principles of material flow accounting mfa on the grounds of published statistical data data compilations and estimation procedures for material flows not covered by international statistical sources we compiled a quantitative estimate of annual global extraction of biomass fossil energy carriers metal ores industrial minerals and construction minerals for the period 1900 to 2005 this period covers important phases of global industrialisation and economic growth the paper analyses the observed changes in the overall size and composition of global material flows in relation to the global economy population growth and primary energy consumption we show that during the last century global materials use increased 8 fold humanity currently uses almost 60 billion tons gt of materials per year in particular the period after wwii was characterized by rapid physical growth driven by both population and economic growth within this period there was a shift from the dominance of renewable biomass towards mineral materials materials use increased at a slower pace than the global economy but faster than world population as a consequence material intensity i e the amount of materials required per unit of gdp declined while materials use per capita doubled from 4 6 to 10 3 t cap yr the main material groups show different trajectories while biomass use hardly keeps up with population growth the mineral fractions grow at a rapid pace we show that increases in material productivity are mostly due to the slow growth of biomass use while they are much less pronounced for the mineral fractions so far there is no evidence that growth of global materials use is slowing down or might eventually decline and our results indicate that an increase in material productivity is a general feature of economic development

key sustainability challenges for the global phosphorus resource their implications for global food security and options for mitigation abstract global food security is a priority for the future development agenda of the united nations given the high dependence of the modern global food production system on the continuous supply of commercial phosphorus p fertilizers the goal of achieving global food security could be hampered by any form of paucity of the global p resource p is a finite non substitutable non renewable and geographically restricted resource the anthropogenic influences on this critical resource are likely to pose a number of challenges to its sustainability based on an in depth and systematic review of recently published literature this study presents a detailed methodical and up to date assessment of the key sustainability challenges for the global p resource and highlights their implications for global food security the assessment indicates that the demand for p fertilizer to produce enough food for the growing global population will substantially increase by the middle of this century there are also significant discrepancies in estimates of the lifetime of global phosphate rock the main source of chemical p fertilizer reserves that range from a few hundred to a thousand years however as global reserves deplete exploitation of and exploration for resources will replenish reserves although the global p resource is finite the signs of geopolitical constraints regarding phosphate rock reserves are already evident and are likely to be more intense in future the combined impact of increasing demand dwindling reserves and geopolitical constraints could result in a substantial decline in the production and supply of chemical p fertilizer in the global market and lead to an increased p price and this situation may eventually restrict the access of farmers of many countries to p fertilizers for food production moreover there is evidence of significant p wastage and loss as well as high discharge to water bodies from various systems at different geographical scales the wastage and loss of p in this manner if not checked will not only increase the global demand for p but also result in the increased depletion of global phosphate rock reserves on the other hand the continuing high discharge of p to water bodies will accelerate harmful processes such as algal bloom hypoxia and eutrophication that deplete fish and other aquatic foods the signs of which are already apparent and may cause irreparable damage to aquatic ecosystems shortage in supply of fish and sea foods in turn will restrict the access of many people to a protein based diet and eventually result in hunger and malnutrition however this important fact is often overlooked while addressing the significance of sustainable p management for global food security we recommend that any policy at the international national and local levels that aims to achieve food security and to protect aquatic ecosystems should incorporate measures to address the key sustainability challenges for the global p resource an overview of the recent advances in the knowledge of sustainable p management strategies as presented in this study could be effectively utilized to mitigate these challenges for achieving global phosphorus security food security and environmental sustainability

an econometric analysis of demand for food quantity and quality in urban china this article offers an analytical framework for studying consumer demand for food quality based on a theory consistent demand model namely the exact affine stone index specification importantly it accounts for unobserved consumer and regional heterogeneity and allows for arbitrary engel curves the empirical value of our framework is illustrated in an econometric analysis of demand for food quality in china evaluating possible structural changes in consumer food expenditures in china is of paramount importance given the ever increasing global role of china and the implications of the structural food preference changes for the global food system the major findings emerging from this study indicate that income is an important determinant of demand for food quality and quantity with the relatively more affluent provinces having a higher affinity for food quality

safety in small numbers local strategies for survival and growth in romania and the kyrgyz republic abstract using a comparative study of farm households from poor rural communities in kyrgyzstan and north east romania this paper explores the intricacies of a variety of forms of cooperation in agriculture the findings highlight the safety net labour specialisation asset pooling and service delivery functions of different groups that enable rural livelihoods to at times cope and at times improve in situations of imperfect information sluggish labour and land markets and constrained capital markets the research presented here indicates that small to medium forms of cooperation provide the rural poor with predictable livelihood strategies under conditions of uncertainty specifically cooperative action in the form of groups substitutes for imperfect markets despite the push for decollectivisation and privatisation across transition countries there remains a place for encouraging group initiatives at least for the medium term on the grounds of both poverty alleviation and agricultural growth

impact of bse and bird flu on consumers meat demand in japan in this article we investigate the impact of bse and bird flu on consumers meat demand in japan by using the almost ideal demand system the bse and bird flu scares brought about a fall in demand for beef and chicken respectively and an upturn in demand for pork and fishery products which are substitutes for beef and chicken in japan we also find that the bird flu outbreak had no impact on the market share for beef this suggests that bse had a larger impact on consumers meat demand than did bird flu our empirical results also show that bse has had a persistent impact whereas bird flu has not these differences might depend on the characteristics of each disease such as the incubation period cure rate and infection risk

widowhood and poverty in rural india some inferences from household survey data abstract this paper examines the relationship between widowhood and poverty in rural india based on national sample survey data on consumer expenditure in terms of standard poverty indices based on household per capita expenditure there is no evidence of widows being disproportionately concentrated in poor households or of female headed households being poorer than male headed households these findings also apply in terms of adult equivalent consumption for any reasonable choice of equivalence scales poverty indices for different household types however are quite sensitive to the level of economies of scale even relatively small economies of scale imply that the incidence of poverty among single widows widows living with unmarried children and female household heads all of whom tend to live in relatively small households is higher than in the population as a whole

coupon redemption and its effect on household cheese purchases by endogenizing unit value and coupon redemption we estimate u s household cheese purchase quality choice and coupon redemption equations simultaneously zero purchases and missing values on coupons and unit values are taken into account in the model to correct for selectivity bias correlations among the three equations are found to be significant empirical findings show that high quality choice significantly decreases cheese purchases while cheese coupon usage significantly increases purchases we find that higher income households select higher quality cheese while larger households choose lower quality cheese for coupon redemption we find that african american and hispanic households redeem less while asian households have no significant difference compared to caucasian households

the power of the vegetable patch how home grown food helps large rural households achieve economies of scale escape poverty this paper explores how the household s capacity to grow food impacts their ability to achieve economies of scale in food consumption and how this impacts the geographic distribution of poverty across rural and urban areas an accurate understanding of consumption economies of scale is vital for comparing poverty levels across households of varying size using sri lankan data on home grown food consumption we empirically confirm that such economies of scale exist and that large households tend to consume relatively more home grown food than smaller households the magnitude of these scale economies are found to be larger than those in market purchased food but smaller than those found in housing expenditure consuming more home grown food is also found to be positively correlated with per capita calories consumed taking these effects into account in poverty estimates leads to a 15 per cent decline in the number of household who fall below the poverty line in rural regions

food stamps and the market demand for food this article compares estimates of disaggregated market food demand responses to the supplemental nutrition assistance program benefits based on exact nonlinear aggregation to responses based on linear aggregation by accounting for income inequality nonlinear aggregation implies that only the households that receive benefits contribute to market demand responses in contrast linear aggregation presumes all households receive benefits and thus contribute to the market demand response the consequence is that nonlinear market estimates are smaller than the linear estimates by roughly the fraction of households that receive benefits

quantity and quality effects of advertising a demand system approach quantity and quality effects of advertising are investigated in this article a censored demand system is estimated for fish beef pork and other meats using norwegian household data in the demand model generic fish advertising and meat advertising is introduced as demand shifters and at the same time unit values are treated as endogenous the unit values capture the quality of the commodities empirical findings show that advertising can have both quantity and quality effects on household demand

fluid milk purchases a multivariate tobit analysis we formulate an econometric model of fluid milk expenditures taking into account two important characteristics expenditures may be censored at zero and may be interdependent across milk type censoring of fluid milk expenditures is addressed with a generalized tobit system estimator interdependence of milk expenditures is examined through a likelihood function with no restrictions on elements of the engel curve error covariance matrix expenditure function parameters are estimated using a march 1991 to march 1992 u s consumer panel

is there curvature in the slutsky matrix d o the poor substitute among commodities more flexibly than the rich when relative prices change even when compensated for the income effects of the price changes is it necessary to add a third dimension to the slutsky substitution matrix to identify household income in short do the terms of the slutsky elasticity matrix curve smoothly from poor households to rich households in such a way that equation 1 is meaningful

the generalized composite commodity theorem and food demand estimation this article reports tests of aggregation over consumer food products and estimates of aggregate food demand elasticities evidence that food demand variables follow unit root processes leads us to build on and simplify existing tests of the generalized composite commodity theorem we compute food demand elasticities using a method of cointegration that is shown to apply to a convenient but nonlinear functional form estimates are based on consumer reported expenditure data rather than commercial disappearance data appropriately specified models of consumer demand are central to market analysis it has been established that a valid equilibrium for markets characterized by diverse firms or diverse consumer products depends on downward sloping composite demand curves heiner braulke wohlgenant or on valid indirect utility functions chavas and cox given the large number of consumer food products food demand and price analysis must be implemented at some level of product aggregation improper aggregation can lead to biased estimates of welfare loss associated with public policies biased estimates of consumer and derived demand elasticities and misleading tests of market power testing for consistent aggregation over food products and estimating aggregate consumer food demand elasticities are the subjects of this article by far the most common justification for aggregation has been separable preferences one reason for its popularity has been the lack of a viable alternative tests of the composite commodity theorem hicks leontief lewbel are always rejected because it restricts relative prices within a group to remain fixed over time on the other hand aggregation based on weak separability is often rejected diewert and wales eales and unnevehr

collective agricultural production a solution for transition economies abstract the paper examines theoretical reasons and provides examples for productivity differences between agricultural service cooperatives and collectives service cooperatives can utilize economies of scale enhance competitiveness and provide technical information advantages that often outweighed problems of free riding low investment and excessive political intervention agricultural collectives while not adding substantial advantages are in addition associated with problems of supervision and effort supply tendencies to substitute casual workers or mechanization for regular members and low investment incentives while collective forms of organization in transition economies respond to high risk and market imperfections they do so inefficiently policies that create conditions for service cooperatives to compete may lead to large productivity gains

a case study of a phosphorus chemical firm s application of resource efficiency and eco efficiency in industrial metabolism under circular economy abstract circular economy plays an essential and useful role in china in considering economic and ecological sustainability individual firms as the primary implements of a circular economy are facing many obstacles at present in aspects of resource and ecological efficiency therefore this study presents a set of tools to help decision makers better solve these problems and to guide resource based chemical industries in sustainable development first this study describes resource efficiency based on the sfa of a selected p chemistry firm and identifies the key potential opportunities for improvement using analysis tools and assessment tools furthermore by applying eco design and decision tools a firm level p chemical circular economic system is designed and constructed a phosphorus chemical optimization model is established and relevant successive scenarios are generated finally the corresponding feasible solutions and policy recommendations are proposed to improve economic benefit resource efficiency waste recycling rate and eco efficiency after industry design planning and technological progress the total economic benefit increases dramatically and the recycling efficiencies of accompanying resources f si i and s improve by different degrees the results demonstrate that the economic benefit of phosphorus products increases by 28 5 and p utilization efficiency correspondingly increases from 81 1 to 94 7 the comprehensive utilization efficiency of phosphor gypsum increases to 100 and the eco efficiency could be improved significantly by eliminating the phosphor gypsum stack this study demonstrates that technological progress in mineral processing and the production of associated products is the endogenic motivation to increase economic benefit and improve resource efficiency the method proposed in this paper can be applied duplicated and spread not only within the p chemical industry but also in other resource based chemical industries

substance flow analysis as a tool for the elucidation of anthropogenic phosphorus metabolism in china abstract substance flow analysis was used to develop a stock and flow model that was applied to time series data from 1984 to 2008 to explore the correlation between change traits of anthropogenic phosphorus p metabolism in china and socioeconomic variables quantify the accumulation of p in natural reservoirs and search for man made stocks with the greatest potential for recovering p resources the results showed that a total of 154 5 tg p was extracted in china but 80 5 was lost to natural water and soil indicating the unsustainability of societal p metabolism urbanization improved standards of living and population growth are responsible for the rising magnitudes of the p flows related to ore extraction use and waste generation and the declining ratio of recycled p wastes while inefficient small mines and corresponding restrictive policies contributed to the large fluctuation in ore extraction and waste generation in 2001 2008 financial and policy support combined with technological advances strongly promoted the progress of the phosphate fertilizer industry in china which transformed the country from a net importer into a net exporter of p materials after 2000 three anthropogenic stocks were formed 38 3 tg p in agricultural soil 19 0 tg p in natural water and 105 3 tg in natural soil the last stock included 41 4 tg p in mining wastes abandoned by small mines which will be valuable human induced mines for the secondary recovery of p resources in the future model uncertainties are analyzed and conclusions and suggestions are presented

wife s employment food expenditures and apparent nutrient intake evidence from canada the increase in women working outside the home has had important economic effects one effect involves food expenditures both in terms of patterns of eating out and the types of foods prepared in the home with consequent effects on nutrient availability this study examines the effect of wife s employment on an extensive set of variables describing food behavior the variables include the share of food in total expenditure the share of food away from home fafh in the food budget price paid per calorie and the per capita availability of twelve nutrients the results are of potential interest for food policy for nutrition education and for programs which aim to affect the nutrient composition of food eaten outside the home restaurant food fast food school meals etc in ad

adult equivalence scales and food expenditures an application to mexican beef and pork purchases in the analysis of food expenditures the use of a simple count of household members as an estimate of household size implicitly assumes each household member has the same marginal impact in this analysis of mexican food expenditures endogenously determined adult equivalence scales are estimated in such a way that these marginal impacts are allowed to vary by household member age and gender the results of a series of hypothesis tests indicate a rejection of the implied null hypothesis of equal marginal expenditure impacts associated with the use of the traditional count based household size variable this study also rejects the null hypothesis of the equality of adult equivalent scales across the commodities included in this analysis

towards circular economy implementation a comprehensive review in context of manufacturing industry the concept of circular economy ce is to an increasing extent treated as a solution to series of challenges such as waste generation resource scarcity and sustaining economic benefits however the concept of circularity is not of novel as such specific circumstances and motivations have stimulated ideas relevant to circularity in the past through activities such as reuse remanufacturing or recycling main objectives of this work are to provide a comprehensive review of research efforts encompassing aspects of resources scarcity waste generation and economic advantages to explore the ce landscape in the context of these three aspects especially when they are considered simultaneously based on an idea of a comprehensive ce framework propose an implementation strategy using top down and bottom up approach in a concurrent manner to fulfill this objective a comprehensive review of state of the art research is carried out to understand different ideas relevant to ce motivation for the research and context of their recurrence main contributions of this paper are a comprehensive ce framework and a practical implementation strategy for a regenerative economy and natural environment the framework emphasizes on a combined view of three main aspects i e environment resources and economic benefits it also underlines that joint support of all stakeholders is necessary in order to successfully implement the ce concept at large scale the proposed framework and implementation strategy also identify new avenues for future research and practice in the field of ce

the quantity and variety of households meat purchases a censored demand system approach this study investigates the demand for 10 disaggregated meat products by u s households a censored demand system which imposes budget constraints in both observed and latent shares is estimated along with a detailed explanation of the estimation procedure additional details about the methodology not provided in previous studies should help researchers to empirically apply the model an innovation of the study is to introduce the censored demand system model for studying the variety of a household s food purchases most households buy between seven and eight different products and hardly change the variety of their purchases with changes in meat expenditure