may the pro poor impacts of trade liberalisation vanish because of imperfect information abstract in this paper we try to evaluate changes in welfare gains and their distribution due to trade liberalisation when imperfect information is considered the results of two versions of a computable general equilibrium cge model using the gtap database and representing goods as well as capital flows are compared in the first version a standard world cge approach is followed in the second version we included risk aversion imperfect information and production lag in the agricultural sector after a brief description of the two versions changes in welfare represented by the income of two types of household middle low and middle high in three regions europe united states rest of the world after agricultural trade liberalisation are presented theoretical and political consequences of the results are discussed

intergenerational equity and sustainability abstract this paper explores the limitations of conventional economic analysis of intergenerational problems and examines some of the alternatives suggested in the literature it is argued that proper consideration of future generations has at least three requirements first when future costs and benefits are considered it should be taken into account that they are to be enjoyed by different generations second the sustainability requirement should be adopted this represents an equity commitment to the future and implies the recognition that future generations have the right to nondeteriorated ecological and economic capacity the paper studies the ways in which the recognition of these rights might be incorporated into economic evaluation and management third an appropriate institutional network to enforce the recognition of these rights in decision making processes should be constituted its design and necessary functions are also analyzed

sps and tbt agreements and international agricultural trade retaliation or cooperation in this article we investigate whether the brazilian notifications to the tbt and sps agreements are characterized as retaliation or as cooperation in international agricultural trade in the period 1996 2008 a generalized method of moments gmm model is used to estimate game models of bilateral trade between brazil and its major partners united states european union and japan from the viewpoint of strategic games the results suggest that the brazilian notifications are forms of retaliation against the united states and regarding the european union the best result for brazil was conciliation on the other hand if the results are interpreted as equilibria of bargaining games they suggest that brazil has great bargaining power in trade with the united states and that cooperation characterized agricultural trade between brazil and the european union in the period analyzed in the case of agricultural trade between brazil and japan only japan has characteristics of a country with significant bargaining power

trq complications who gets the benefits when the eu liberalizes mercosur s access to the beef markets the european union eu and the mercosur countries resumed negotiations on trade liberalization in may 2010 after several years of interruption the article analyzes who stands to benefit and who is likely to lose if the eu liberalizes mercosur s access to domestic beef markets this economic assessment is performed using a partial equilibrium model for beef operating at a low level of product aggregation paying specific attention to the role of tariff rate quotas trqs consultations with experts from the meat sector allowed us to identify the allocation of the quota rents to different stakeholders under an agreement based on the eu s negotiation proposal trade impacts are projected to be small due to the present quota overfill as expected impacts are more pronounced under the conditions set out in mercosur s proposal the results confirm that the distribution of quota rents can be decisive in determining welfare effects

food insecurity and public assistance this paper examines if welfare programs reduce the probability that vulnerable households experience food deprivation because of financial constraints although the 1996 welfare reform legislation specifically limited the eligibility of immigrant households to receive assistance many states chose to protect their immigrant populations by offering state funded aid to these groups i exploit these changes in eligibility rules to examine the link between food insecurity and public assistance the evidence indicates that a 10 percentage point cut in the fraction of the population that receives public assistance increases the fraction of food insecure households by about 5 percentage points

household history snap participation and food insecurity abstract food security in an important public policy issue in 2015 approximately 1 in 8 u s households experienced food insecurity at some point in the year low income families are at higher risk for food insecurity than other families and these families may also face higher levels of disruption e g moves loss of income or individuals entering or leaving the household than other families i use data from the survey of income and program participation to explore the relationship between food insecurity the household s history during the previous year and snap participation the results indicate that a number of aspects of the household s recent experience including negative income shocks moves and both increases and decreases in household size increase the probability of being food insecure while snap participation is estimated to reduce the probability of being food insecure

economywide impacts of climate change on agriculture in sub saharan africa two possible adaptation scenarios to climate change for sub saharan africa are analyzed under the sres b2 scenario the first scenario doubles the irrigated area in sub saharan africa by 2050 compared to the baseline but keeps total crop area constant the second scenario increases both rainfed and irrigated crop yields by 25 for all sub saharan african countries the two adaptation scenarios are analyzed with impact a partial equilibrium agricultural sector model combined with a water simulation module and with gtap w a general equilibrium model including water resources the methodology combines the advantages of a partial equilibrium approach which considers detailed water agriculture linkages with a general equilibrium approach which takes into account linkages between agriculture and nonagricultural sectors and includes a full treatment of factor markets the efficacy of the two scenarios as adaptation measures to cope with climate change is discussed due to the limited initial irrigated area in the region an increase in agricultural productivity achieves better outcomes than an expansion of irrigated area even though sub saharan africa is not a key contributor to global food production rainfed irrigated or total both scenarios help lower world food prices stimulating national and international food markets

how much does the supplemental nutrition assistance program reduce food insecurity nearly 15 of all u s households and 40 of near poor households were food insecure in 2009 the supplemental nutrition assistance program snap is the cornerstone of federal food assistance programs and serves as the first line of defense against food related hardship this paper measures the effectiveness of snap in reducing food insecurity using an instrumental variables approach to control for selection our results suggest that receipt of snap benefits reduces the likelihood of being food insecure by roughly 30 and reduces the likelihood of being very food insecure by 20

the effect of safety net programs on food insecurity we investigate to what extent major safety net program benefits affect food insecurity in families we impute program eligibility and benefits in each state for 2001 2009 accounting for cross program eligibility rules we use simulated eligibility and benefits for a nationally representative sample as instruments for imputed eligibility and potential benefits among nonimmigrant low income single parent families 1 000 in potential cash or food benefits reduces the incidence of food insecurity by 1 1 percentage points on a base of 33 percent cash and food both reduce food insecurity the results highlight the importance of jointly considering a full range of safety net programs

evaluation of land use based greenhouse gas abatement measures in germany abstract agricultural production contributes 11 to the total german greenhouse gas ghg emissions we compare the efficiency of three different land use based ghg abatement measures in combination and as separately applied measures the production of short rotation coppices of feedstocks for biomethane production and peatland restoration we evaluate these options with respect to the following criteria cost efficiency ghg abatement costs abatement potential and impact on agricultural production we use the regional supply model raumis to investigate the different abatement measures at the sector and regional level up to a reduction of ghg emission of 25 1012 g co2eq peatland restoration is the most cost efficient option short rotation coppice allow some cost efficient mitigation also only at limited scale energy maize is only an option if high abatement targets should be met the joint implementation of several abatement strategies allows meeting specified targets at lower costs the crowding out effect between the options is limited the spatial analysis indicates measure specific regional competitiveness and application e g short rotation coppice in eastern and southern germany peat restoration in northern germany and energy maize production in central germany

effect of distance of transportation on willingness to pay for food abstract consumers interest in locally produced foods is increasing hence there is a need to decipher and quantify consumers desire for local foods and understand the underlying causes of this demand more specifically we examine in this paper the issue of distance of transportation and its impact on consumer preferences we investigate how consumers willingness to pay wtp for food varies with the distance the food traveled results from non hypothetical second price auctions indicate that average wtp is falling in distance traveled indicating a preference for local production results also indicate that the marginal value of a mile traveled depends on the type of food studied apples vs wine socio demographic characteristics perceptions of freshness taste and food safety as well as support of local economy impact wtp for local foods

taxing international emissions trading we investigate the efficiency and effectiveness consequences of emissions trading taxation a theoretical partial equilibrium model is developed showing that permits taxation distorts the equilibrium price and abatement efforts potentially counterintuitive conclusions concerning the tax revenue are also derived a cge model complements theoretical results suggesting that the change in the equilibrium permits price brought about by taxation can be significant finally we conclude that policy design based on cost effectiveness might lead to wrong conclusions the socially desirable design of emissions trading taxation requires homogenous tax rates applied to net sellers and no rebate rates allowed for net buyers

monotone instrumental variables with an application to the returns to schooling for fifty years econometric analyses of treatment response have made extensive use of instrumental variable iv assumptions holding that mean response is constant across specified subpopulations of a population of interest 2 yet the credibility of mean independence conditions and other iv assumptions has often been a matter of considerable disagreement with much debate about whether some covariate is or is not a valid instrument in an application of interest there is therefore good reason to consider weaker but more credible assumptions to this end we introduce monotone instlumental variable miv assumptions holding that mean response varies weakly monotonically across specified subpopulations we study the identifying power of these miv assumptions and give an empirical application the findings reported here add to the literature developing nonparametric bounds on treatment effects 3 this paper uses the same formal setup as manski 1997 there is a probability space j x2 p of individuals each member j of population j has observable covariates xi e x and a response function yj t y mapping the mutually exclusive and exhaustive treatments t e t into outcomes yj t e y person j has a realized treatment zj e t and a realized outcome y 1 y zi both of which are observable the latent outcomes yj t

food stamps and food insecurity what can be learned in the presence of nonclassical measurement error policymakers have been puzzled to observe that food stamp households appear more likely to be food insecure than observationally similar eligible nonparticipating households we reexamine this issue allowing for nonclassical reporting errors in food stamp participation and food insecurity extending the literature on partially identified parameters we introduce a nonparametric framework that makes transparent what can be known about conditional probabilities when a binary outcome and conditioning variable are both subject to nonclassical measurement error we find that the food insecurity paradox hinges on assumptions about the data that are not supported by the previous food stamp participation literature

assessing agricultural trade policies options with the european union a brazilian perspective brazil has shown interest in agricultural trade negotiations at bilateral regional and multilateral levels this study addresses several important negotiations using the agricultural sector model capri common agricultural policy regional impact analysis to analyze liberalization scenarios between the european union and the mercosur countries focusing particularly on their impacts in brazil four possible agreements between europe and mercosur are simulated including a broader multilateral agreement proposed in the g20 the results suggest that a bilateral scenario involving larger tariff rate quota increase as called for by mercosur generates larger gains than accepting the european union proposal of 2004 or further multilateral trade liberalization based on the g20 proposal however much larger increases in tariff rate quotas for all products are not necessarily justified in all cases moreover brazil s production and export potential is limited by factors other than trade restrictions resume d auteur

economic status and health in childhood the origins of the gradient the well known positive association between health and income in adulthood has antecedents in childhood not only is children s health positively related to household income but the relationship between household income and children s health becomes more pronounced as children age part of the relationship can be explained by the arrival and impact of chronic conditions children from lower income households with chronic conditions have worse health than do those from higher income households the adverse health effects of lower income accumulate over children s lives part of the intergenerational transmission of socioeconomic status may work through the impact of parents income on children s health

marginal abatement costs of greenhouse gas emissions from european agriculture cost effectiveness and the eu non ets burden sharing agreement abstract we propose a quantitative assessment of the marginal abatement costs mac of greenhouse gas emissions from european agriculture and analyze the implications of the non ets burden sharing agreement bsa for this sector this assessment is based on mac reduced forms the generic specification of which enables simple parameterization and numerical computations such mac curves are parameterized for each member state using the outputs of a detailed model of the european agricultural supply they are then used to compute total and marginal abatement costs involved by the bsa targets as well as the cost effective effort sharing the corresponding emission price and abatement costs the main findings are i flexibility mechanisms such as a cap and trade system for agricultural emissions could reduce the total costs of meeting the 10 eu abatement target by a factor two to three relative to the strict implementation of each country s target ii the corresponding equilibrium emission price is found to be 32 42 tco2eq depending on the assumption regarding business as usual emissions and iii a cap and trade system with allowances based on the bsa targets would involve substantial transfers from eu 15 countries to new member states an important share of which being made of hot air

employer search training and vacancy duration we develop a model of optimal employer search strategy when information about match quality is endogenous the model is tested using four data sets two of which have not previously been used as theory predicts we find that when filling positions requiring more training employers search more intensively and extensively employers also search more extensively when hiring workers with more education and with prior experience these findings provide strong evidence of systematic variation in search strategies based on the characteristics of the positions and job applicants factors that influence employer search also affect the duration of a vacancy

does the current trade liberalization agenda contribute to greenhouse gas emission mitigation in agriculture abstract this paper contributes to the literature on the trade liberalization climate change nexus by investigating the impact of the current free trade agenda of the european union eu on the effectiveness of a possible greenhouse gas ghg reduction policy for its agricultural sector for the analysis we implement scenarios with a carbon tax on non co2 emissions and trade liberalization both individually and combined in capri a global partial equilibrium model for agriculture scenario results indicate that the simulated trade liberalization by itself has only modest effects on agricultural ghg emissions by 2030 pricing agricultural non co2 emissions in the eu triggers the adoption of mitigation technologies which contributes to emission reductions emission leakage however partially offsets the eu emission savings as production increases in less emission efficient regions in the world the combination of agricultural trade liberalization and carbon pricing increases emission leakage and therefore further undermines global mitigation gains our results hinge on the key assumptions that future trade agreements between non eu countries are not considered and that the climate actions are limited to the eu only despite these limitations we conclude that from a global ghg mitigation perspective trade agreements should address emission leakage for instance by being conditional on participating nations adopting measures directed towards ghg mitigation

the macro dimensions of food security economic growth equitable distribution and food price stability abstract rather than asking how to cope with hunger and famine the question might be how to escape their threat altogether important in this regard is recognizing that agriculture and the rural economy are greatly influenced by policies and outcomes in the rest of the economy strategies include economic growth with unchanging income distribution and growth with redistribution the latter encourages balanced growth to create non farm employment opportunities while investing in rural infrastructure

expenditure response to increases in in kind transfers evidence from the supplemental nutrition assistance program recent studies on food stamp participant households marginal propensity to spend out of food stamps versus income have had contradictory results experimental studies have found household behavior aligns with standard economic theory where households marginal propensity to spend on food out of food stamps is equivalent to cash income observational studies nd that households have a larger marginal propensity to spend out of food stamps than cash income in this study we re examine this question by estimating how an unprecedentedly large increase in food stamp benets due to the implementation of the american recovery and reinvestment act aects food at home expenditure we nd that the policy change caused households to increase food at home expenditure as well as increase households share of total expenditure allocated toward food at home expenditure we compare these results to a time period without a meaningful food stamp policy change and nd our results are unique to the arra implementation time period

food environment in the united states as a complex economic system the food environment in the united states is complex sixteen socio economic demographic variables from various public data sources are studied with a machine learning algorithm to ascertain the causality structure associated with the food environment in the united states high levels of unemployment and poverty are direct causes of high levels of food insecurity while low income causes high levels of food insecurity via increased levels of poverty unemployment is a common cause for both increased levels of food insecurity and poverty we find that food insecurity and participation in supplemental nutrition assistance program snap are related yet no direct causality is observed contrary to past studies which find that snap participation decreased the occurrences of poverty in contemporaneous time we find that poverty and snap participation are related through several back door paths via food insecurity unemployment race and food taxes obesity and snap participation are indirectly related via several back door paths namely race income poverty and food insecurity and unemployment also food insecurity and obesity are related by several back door paths low income high food taxes and race being black and non hispanic are direct causes of obesity the complex causality structure in the us food environment reveals that policy variables cannot be treated independently of their rich causal structure government agencies responsible for designing policies for food assistance poverty alleviation combating food insecurity and obesity need to consider the interrelationships among these variables

on nonlinear dynamics the case of the pork cycle new methods for analyzing nonlinear dynamic processes are used to evaluate the hogcorn price ratio the results present evidence of nonlinear dynamics in the pork cycle moreover while garch processes account for some of the nonlinearities the pork cycle is apparently characterized by more complex dynamic forms the empirical analysis provides some evidence of the presence of chaos in the pork cycle the results also indicate that the dynamic process generating the pork cycle is nonlinear and cannot be adequately characterized by a small number of state variables

can private motor vehicle augmenting technical progress reduce household and total fuel use abstract this paper demonstrates the importance of modelling energy intensive household services in general and private transportation in particular as combinations of energy and other inputs initially a partial equilibrium approach is used to analyse private transport consumption as a self produced commodity formed by household vehicle and fuel use we particularly focus on the impact of private vehicle augmenting technical progress in this framework we show that household fuel use will fall if it is easier to substitute between vehicles and fuel in the household production of private transport services than it is to substitute between private transport and the composite of all other goods in overall household consumption the analysis is then extended through computable general equilibrium simulation to investigate the wider implications of similar efficiency improvements when intermediate demand prices and nominal income are endogenous the subsequent reduction in the price of private transport service not observable in market prices allows the wage measured relative to the cpi to rise whilst the wage relative to the price of foreign goods falls this simultaneously increases uk international competitiveness encouraging increased exports and reduced import penetration whilst allowing employment to rise this provides an additional supply side stimulus to production employment and household income

an economic model of welfare stigma perhaps the most basic assumption of the economic theory of consumer demand is that more is better than less virtually all of the major propositions of consumer theory can in a certain sense be derived from the assumption that goods are good interestingly however this tenet seems to be violated by the behavior of many individuals in the low income population for many turn out to be eligible for a positive welfare benefit but do not in fact join the welfare rolls for example it has been estimated that in 1970 only about 69 percent of the families eligible for afdc aid to families with dependent children participated in the program see richard michel 1980 the corresponding percentage for afdc u the program for which families with an unemployed male are eligible was only 43 percent and the participation rate in the food stamp program was only 38 percent see maurice mcdonald 1977 this phenomenon has puzzled many investigators because such individuals do not locate on the boundaries of their budget sets consequently most investigators ignore the problem when studying the effects of welfare programs on behavior in this paper this seemingly irrational rejection of an increase in income is modeled as resulting from welfare stigma that is from disutility arising from participation in a welfare program per se 1 the existence of stigma has been amply documented in the sociological literature patrick horan and patricia austin 1974 lee rainwater 1979 where interviews of recipients have often uncovered feelings of lack of self respect and negative self characterizations from participation in welfare nevertheless this phenomenon has not been modeled and many questions consequently remain when is the disutility of participation strong enough to prevent participation shouldn t we expect individuals to weigh the disutility of participation against the potential benefit in their decisions what is the elasticity of participation with respect to the potential benefit also in a slightly different vein how are the work disincentives of welfare affected by stigma these questions have been given scant attention by economists yet they are crucial for our ability to predict the impact of various welfare programs on the lowincome population here these questions are addressed by modeling nonparticipation as a utility maximizing decision the model is developed and estimated for the afdc program 2 the model posits an individual utility function containing not just disposable income but

when risk generates chaos abstract with risk averse producers the traditional linear cobweb model becomes nonlinear the currently produced quantity is an homographic function of previous years quantities this may result in the market generating chaotic price and quantity series especially if demand is rigid hedging facilities are unable to reduce the magnitude of fluctuations which are socially detrimental especially from the consumers point of view this might justify public intervention on markets such as staple food commodities or health cares

the food stamp program and food insufficiency food stamp participants have higher food insufficiency rates than eligible nonparticipants even after controlling for other factors given the food stamp program s prominent role in the alleviation of hunger this is a counterintuitive result we conjecture that these higher rates are due to adverse selection insofar as households more likely to be food insufficient are also more likely to receive food stamps we establish a theoretical framework to address this adverse selection using a simultaneous equation model with two probits we show that once one controls for this adverse selection food stamp recipients have the same probability of food insufficiency as nonrecipients copyright 2001 oxford university press

food stamp program participation and food insecurity an instrumental variables approach the relationship between food stamp program fsp participation and household food insecurity fi is investigated using data from the 1996 1997 national food stamp program survey endogeneity of fsp participation is accommodated with an instrumental variables approach in contrast to other findings reported in the literature results suggest participation in the fsp reduces the severity of fi sociodemographic variables play important roles in fsp participation and fi underreporting of fsp participation and limited observations of food insecure households in previous studies may have also been factors copyright 2008 oxford university press

the intergenerational transmission of welfare receipt a nonparametric bounds analysis using a nonparametric bounding method and data from the panel study of income dynamics i examine the effect that growing up in a household that receives aid to families with dependent children af

capital market liberalization economic growth and instability summary this paper reviews briefly the arguments for capital market liberalization and identifies their theoretical and empirical weaknesses this provides the foundations for the argument for intervention in short term capital flows the paper concludes with a brief discussion of the various ways in which such interventions may be implemented 2000 elsevier science ltd all rights reserved

flexible and semiflexible consumer demands with quadratic engel curves in this paper we introduce three flexible consumer demand systems in which expenditures on goods are quadratic functions of income we view these alternatives as to the demand systems used heretofore in the empirical modeling of rank three demands namely those in which expenditure shares are quadratic functions of the logarithm of income curvature conditions required by theory can be imposed locally during the estimation for each and a semiflexible version can be estimated for illustrative purposes we estimate various forms of two of the systems using canadian data on seven categories of goods for the period 1947 to 1995

cash equivalence welfare stigma and food stamps the food stamp program fsp is one of the largest domestic redistributive transfer programs with approximately 22 million participants at a cost of 12 billion in 1983 the stated objective of the fsp is to raise the levels of nutrition among low income households by providing such households with an opportunity to obtain a low cost nutritionally adequate diet 29 5 for program evaluation and cost forecasting accurate estimates of the determinants of eligible households program participation and food expenditure decisions are of particular concern in light of the elimination of the purchase requirement epr and other recent structural changes in the program the problem of obtaining these estimates has three dimensions first observations on the behavior of eligible households under the post epr institutional setting are required second the roles of welfare stigma and the cash equivalence of the in kind food stamps must be clarified finally because program participation is a household choice that affects food expenditures the interdependence of eligible households fsp participation and food expenditure decisions must be accommodated emphasizing an important component of this interdependence the connection between cash equivalence of stamps in the participation decision and in expenditures for food this paper tackles all three dimensions the purpose of this study is to determine the extent to which food stamps are cash equivalent and to determine which program and household characteristics including the degree of cash equivalence and stigma affect post epr food stamp program participation

partially identifying treatment effects with an application to covering the uninsured we extend the nonparametric literature on partially identified probability distributions and use our analytical results to provide sharp bounds on the impact of universal health insurance on provider visits and medical expenditures our approach accounts for uncertainty about the reliability of self reported insurance status as well as uncertainty created by unknown counterfactuals we construct health insurance validation data using detailed information from the medical expenditure panel survey imposing relatively weak nonparametric assumptions we estimate that under universal coverage monthly per capita provider visits and expenditures would rise by less than 8 percent and 16 percent respectively across the nonelderly population

bounding causal effects using data from a contaminated natural experiment analysing the effects of teenage childbearing in this paper we consider what can be learned about causal effects when one uses a contaminated instrumental variable in particular we consider what inferences can be made about the causal effect of teenage childbearing on a teen mother s subsequent outcomes when we use the natural experiment of miscarriages to form an instrumental variable for teen births miscarriages might not meet all of the conditions required for an instrumental variable to identify such causal effects for all of the observations in our sample however it is an appropriate instrumental variable for some women namely those pregnant women who experience a random miscarriage although information from typical data sources does not allow one to identify these women we show that one can adapt results from horowitz and manski 1995 on identification with data from contaminated samples to construct informative bounds on the causal effect of teenage childbearing we use these bounds to re examine the effects of early chilbearing on the teen mother s subsequent educational and labour market attainment as considered in hotz mcelroy and sanders 1995a 1995b consistent with their study these bounds indicate that women who have births as teens have higher labour market earnings and hours worked compared to what they would have attained if their childbearing had been delayed

the role of prices in measuring the poor s living standards in this paper we revisit two pieces of conventional wisdom in the current debate about poverty paying close attention to the price data underlying these findings that the poor pay more than households of higher income for the goods and services they purchase and that poverty rates at least as measured by the u s census have remained essentially flat since the late 1960s raising questions about the success of the policies implemented to reduce poverty by examining scanner data on thousands of household purchases we find that the poor pay less not more for the goods they purchase and by extending the advances on price measurement in the recent decade back to the 1970s we find that current poverty rates are less than half of the official numbers

an integrated economic and distributional analysis of energy policies most public policies particularly those in the energy sphere have not only efficiency but also distributional effects however there is a trade off between modelling approaches suitable for calculating those impacts on the economy for the former most of the studies have been conducted with general equilibrium models whereas partial equilibrium models represent the main approach for distributional analysis this paper proposes a methodology to simultaneously carry out an analysis of the distributional and efficiency consequences of changes in energy taxation in order to do so we have integrated a microeconomic household demand model and a computable general equilibrium model for the spanish economy we illustrate the advantages of this approach by simulating a revenue neutral reform in spanish indirect taxation with a large increase of energy taxes that serve an environmental purpose the results show that the reforms bring about significant efficiency and distributional effects in some cases counterintuitive and demonstrate the academic and social utility of this approximation

integrating bioenergy into computable general equilibrium models a survey in the past years biofuels have received increased attention since they were believed to contribute to rural development energy security and to fight global warming it became clear though that bioenergy cannot be evaluated independently of the rest of the economy and that national and international feedback effects are important computable general equilibrium cge models have been widely employed in order to study the effects of international climate policies the main characteristic of these models is their encompassing scope global models cover the whole world economy disaggregated into regions and countries as well as diverse sectors of economic activity such a modelling framework unveils direct and indirect feedback effects of certain policies or shocks across sectors and countries cge models are thus well suited for the study of bioenergy biofuel policies one can currently find various approaches in the literature of incorporating bioenergy into a cge framework this paper gives an overview of existing approaches critically assesses their respective power and discusses the advantages of cge models compared to partial equilibrium models grouping different approaches into categories and highlighting their advantages and disadvantages is important for giving a structure to this rather recent and rapidly growing research area and to provide a guidepost for future work

class racial conflict intolerance and distortions in urban form lessons for sustainability from the detroit region in this qualitative analysis into the equity conditions of urban sustainability an examination is presented into the complexity of one particular aspect of intra generational equity racial and class discrimination and its role in distorting urban form and in generating resource inefficient and environmentally destructive human activity patterns the article therefore focuses on the role of discrimination itself in encouraging ecological degradation the detroit region shows that racial and class conflicts can facilitate the shaping of the urban built environment as one population sub group largely white and upper income attempts to distance itself from another sub group that is largely black lower income and considered a threat the outcome is not only disinvestment and decline in the urban core but also excessive suburbanization as whites seek homogenous urban environments and use space to increase the distance between themselves and the black population the study shows that the lack of cooperation and tolerance across ethnic racial and class subgroups facilitates inefficient low density and scattered developments and excessive degradation of natural ecological systems

sustainable development in a post brundtland world not yet two decades after the publication of our common future the world s political and environmental landscape has changed significantly nonetheless we argue that the concept and practice of sustainable development sd as guiding institutional principle as concrete policy goal and as focus of political struggle remains salient in confronting the multiple challenges of this new global order yet how sd is conceptualized and practiced hinges crucially on the willingness of scholars and practitioners to embrace a plurality of epistemological and normative perspectives on sustainability the multiple interpretations and practices associated with the evolving concept of development and efforts to open up a continuum of local to global public spaces to debate and enact a politics of sustainability embracing pluralism provides a way out of the ideological and epistemological straightjackets that deter more cohesive and politically effective interpretations of sd using pluralism as a starting point for the analysis and normative construction of sustainable development we pay particular attention to how an amalgam of ideas from recent work in ecological economics political ecology and the development as freedom literature might advance the sd debate beyond its post brundtland quagmire enhanced levels of ecological degradation vast inequalities in economic opportunities both within and across societies and a fractured set of institutional arrangements for global environmental governance all represent seemingly insurmountable obstacles to a move towards sustainability while these obstacles are significant we suggest how they might be overcome through a reinvigorated set of notions and practices associated with sustainable development one that explicitly examines the linkages between sustainability policies and sustainability politics

on the asynchronous approvals of gm crops potential market impacts of a trade disruption of eu soy imports due to their high protein content soybeans are important feedstuffs in the european union eu however the cultivation of soybeans using genetically modified gm varieties in non eu countries is increasing and the eu authorization of gm products takes longer than in other countries leading to an asynchronous approval between the eu and non eu countries that might induce soybean trade disruptions this paper uses an integrated modelling system to simulate argentina brazil and the united states ending soybean exports to the eu the impact on world trade and on the eu import prices of soy products is analysed with a computable general equilibrium model eu soy imports are shown to decline and the import price of soybeans in the eu increases the effects on eu agricultural markets are analysed based on a partial equilibrium model feed costs in the eu are found to increase with poultry and pork the most affected production and exports decline and imports increase however the effects of a trade ban are found to be less profound than in many other studies due to compensating substitution effects at various market levels increasing imports from third countries increasing domestic oilseed production and the use of other protein feeds

the effects of direct storage subsidies under limited rationality a general equilibrium analysis we study here the effects of a public subsidy to private storage set up at world level to simulate the welfare effects and impacts on market fluctuations of this subsidy we use a dynamic computable general equilibrium model assuming imperfect expectations we also perform different statistical analysis based on our cge results and show that the storage subsidy can have the undesired effect of destabilizing agricultural markets depending on the form of economic agents price expectations and on the structure of the shocks impacting the agricultural production

the hedge value of international emissions trading under uncertainty this paper estimates the value of international emissions trading focusing on a here to fore neglected component its value as a hedge against uncertainty much analysis has been done of the kyoto protocol and other potential international greenhouse gas mitigation policies comparing the costs of achieving emission targets with and without trading these studies often show large cost reductions for all parties under trading compared to a no trading case we investigate the welfare gains of including emissions trading in the presence of uncertainty in economic growth rates using both a partial equilibrium model based on marginal abatement cost curves and a computable general equilibrium model we find that the hedge value of international trading is small relative to its value in reallocating emissions reductions when the burden sharing scheme does not resemble a least cost allocation we also find that the effects of pre existing tax distortions and terms of trade dominate the hedge value of trading we conclude that the primary value of emissions trading in international agreements is as a burden sharing or wealth transfer mechanism and should be judged accordingly

nitrogen tax and set aside as greenhouse gas abatement policies under global change scenarios a case study for germany the ambitious climate policy objectives of the cop21 agreement require the design and the implementation of effective and efficient policy instruments the effectiveness and efficiency of agricultural abatement options depend on regional climate and natural conditions changes in the global economy global agricultural markets and regional agricultural production thus the assessment of abatement options requires consideration of the global scale the market scale and the regional producer scale we investigate two abatement options discussed controversially in literature both have been partially applied to reduce environmental pollution from agriculture a tax on nitrogen and the obligatory set aside of agricultural land our study provides an assessment of the ecological effectiveness and the economic efficiency of both abatement options under different global scenarios in our policy analysis we combine three applied policy simulation models to develop an integrated economic model framework this model framework considers the global the national and the regional scale and consists of the global general equilibrium model dart bio the partial equilibrium model capri and the regional supply model raumis in the different global scenarios the results show that both abatement options create relatively high marginal abatement costs and that the maximally reached abated greenhouse gas emissions represent only 15 of the quantity required to fulfill the policy targets compared to the obligatory set aside option the nitrogen tax is in both scenarios the more efficient policy with respect to impacts on production and environment a nitrogen tax is less forecastable than the obligatory set aside option our study illustrates the relevance of considering global economic and market change in the assessment of producer targeting environmental policies

informal barriers and agricultural trade does monetary integration matter eu enlargement and the recent sovereign debt crisis of euro zone countries have revived the debate around the european monetary union emu in this article we ask how informal barriers to agricultural and food trade have changed since the introduction of the common european currency and whether this evolution can be attributed to monetary integration we focus on the foreign trade of the 11 emu founder countries over a nine year period covering the creation of the emu and find a diminishing marginal trade impact of both information and institutional barriers we find a lower level of trade barriers but cannot attribute this outcome to the introduction to the euro

economic crisis and the unemployment effect on household food expenditure the case of spain this paper examines the unemployment effect on food expenditure uefe for spanish households and quantifies its magnitude in boom and crisis periods the results show that the uefe was negative in both contexts but was reinforced during the economic crisis applying propensity score matching and difference in differences techniques to a sample of spanish households for 2006 and 2013 representative of a boom period and a crisis period respectively we found that the uefe amounted to 2 9 in the boom period and to 4 5 in the crisis period quantile difference in differences estimates confirmed that the economic crisis enhanced the uefe for spanish households with this effect decreasing continuously up to quantile 0 9 the uefe was exacerbated mainly in those economically disadvantaged households

environmental sustainability as the first principle of distributive justice towards an ecological communitarian normative foundation for ecological economics abstract the ecological economic concern with environmental sustainability embodies the normative orientations of the field this concern is foremost a matter of distributive justice the definition of which determines the relevance of the appropriate scale and efficient allocation criteria yet it would appear that the discipline lacks a shared internally consistent set of ethical premises by which this concern might be legitimized various authors have embraced a rawlsian conception of liberal justice as the appropriate banner for ecological economics in place of the consequentialist libertarian foundations of neoclassical economics including environmental economics it is argued here that this is insufficient in so far as it is premised on a vision of a discrete self sufficient economic actor instead it is posited that an ecological economic ethic must proceed from an understanding of the economic actor as community member a recognition implicit in recent ecological economic contributions focused on discourse ethics and deliberative democracy an ecological communitarian conception of distributive justice which views the well being of the individual as inseparable from the integrity of its implicate mutually constituting human and non human natural communities is advanced as the appropriate basis for the ecological economic world view in this light the thermodynamic foundations of ecological economics are seen to provide the necessary departure point for normative decision making oriented towards ensuring sustainability in economic organization

estimation with response error and nonresponse error in survey data originates from failure to contact the sample and from false answers to verifiable questions these errors may be systematic and associated with uncooperative or unreliable respondents zabel modeled attrition in the survey of income and program participation and found systematic demographic and design effects bollinger and david modeled response error and identified correlations to income per capita in this analysis we link missing interviews in a panel and response error through a trivariate probit analysis robustness of the correlation between attrition and response error is examined by comparing variants of the model the joint model of response error and attrition becomes the first stage of a pseudolikelihood estimate of a model of food stamp participation the model is significantly different from naive probit on the survey data

alternative estimates of the effect of schooling on earnings this is the publisher s version it can also be found here http www mitpressjournals org doi pdf 10 1162 003465300558542