carbon dioxide emissions and governance a nonparametric analysis for the g 20 this paper applies nonparametric estimators to examine countries carbon dioxide co2 emissions and governance relationship by using data for the time period 1996 2010 of the twenty largest economies group of twenty g 20 the dynamics of the considered relationship are analyzed six governance measures are included in our analysis voice and accountability political stability and absence of violence government effectiveness regulatory quality rule of law and control of corruption as have been defined in world governance indicators from the world bank the empirical findings reveal a nonmonotonic relationship between countries co2 emissions and the examined governance measures in addition and with respect to the environmental policy makers a significant difference on the number of governance measures influencing countries carbon dioxide emissions which is subject to countries specific regional and development variations is recorded finally the carbon dioxide emissions governance relationship is highly nonlinear and appears that countries higher governance quality does not always result to lower carbon dioxide emission levels

learning and wage dynamics we develop a dynamic model of learning about worker ability in a competitive labor market the model produces three testable implications regarding wage dynamics 1 although the role of schooling in the labor market s inference process declines as performance observations accumulate the estimated effect of schooling on the level of wages is independent of labor market experience 2 timeinvariant variables correlated with ability but unobserved by employers such as certain test scores are increasingly correlated with wages as experience increases and 3 wage residuals are a martingale we present evidence from the nlsy that is broadly consistent with the model s predictions

statistical discrimination and the early career evolution of the black white wage gap this article develops and tests a simple dynamic model of statistical discrimination the model improves on earlier static models both by allowing ex ante uncertainty about worker productivity to be resolved as on the job performance is observed and by generating several testable empirical implications these predictions are tested using a sample of young men from the national longitudinal survey of youth producing mixed evidence for the model the main empirical result is that no black white wage gap exists at labor force entry but that one develops as experience accumulates mainly because blacks reap smaller gains from job mobility

seasonal poverty in madagascar magnitude and solutions abstract seasonal reductions in food consumption pull about one million malagasy below the poverty line during the lean season there they join the nine million more who remain chronically undernourished throughout the year because the seasonality of food shortages coincides with the increased prevalence of diarrhea and other diseases during the rainy season the resulting lean season exacts a heavy toll in the form of increased rates of malnutrition and child mortality combining the results of recent field studies with a seasonal multi market model this paper measures the probable impacts of three common interventions aimed at combatting seasonal food insecurity we find the most promising interventions to be those that increase agricultural productivity of the secondary food crops such as cassava other roots and tubers and maize

sustaining growth in agriculture a quantitative review of agricultural research investments abstract growth in agriculture depends on many things but one of the most important is investment in agricultural research decision making in the agricultural research policy area can only be aided by access to better information this article overviews a recent endeavor to move policy dialogue beyond merely qualitative impressions towards a process that is underpinned with new and cogent data the data used have been assembled at isnar in a manner designed to make comparisons both over time and between countries more valid than has been the case in the past the comparisons thus possible reveal considerable diversity both between countries and between broad regional aggregations also illuminated here are issues related to the commodity orientation capital and labor intensity and size and scope of particular national programs

carbon emission performance evaluation and allocation in chinese cities abstract this paper presents a dea approach with multiple abatement factors to evaluate co2 emission performance and allocate co2 emission quotas in chinese cities we first consider the difference of marginal abatement costs among cities and construct the non radial directional distance function with multiple abatement factors the total factor co2 emission performance index and its dynamic change index are then proposed to measure co2 emission performance considering equity and efficiency we develop a composite index by the hybrid method to allocate emissions quota which considers co2 emissions as well as co2 emission performance then we conduct an empirical study using inputs and outputs dataset of 71 chinese cities in 2005 2012 chinese cities have poor energy efficiency and still have high co2 emissions the eastern region outperforms the central region and the western region performs worst whereas the dynamic co2 emission performance of the central region has the largest increase the change of co2 emission performance is driven mainly by technological advances as for the co2 emission allocation the composite index method encourages cities to reduce emissions and enhance emission performance through carbon trading market it also motivates cities with high historical emissions to reduce their emissions by improving technology when they have poor co2 emission performance

carbon dioxide emissions allocation a review carbon dioxide co2 emissions allocation plays a fundamental role in determining reduction responsibility at economy level or emission permits at firm level past decades have seen the development and applications of various methods for co2 emissions allocation this paper provides a literature review of co2 emissions allocation with emphasis on the evolution of allocation methods used it begins with a summary of the most popular allocation principles and criteria that lay a foundation for the development of allocation methods we then classify the existing allocation methods into four groups namely indicator optimization game theoretic and hybrid approaches the main features and findings of past studies are identified and summarized while the fairness principle prevails in earlier studies the efficiency principle has been found to receive increasing attention recently we also present a comparison of the empirical results based on ten popular indicator methods to show how indicator choice affects the allocation results issues related to selecting appropriate methods in co2 emissions allocation are finally discussed further research may be carried out to strike a balance between fairness and efficiency so that the allocation results become more widely acceptable and economically feasible

new directions in emissions trading the potential contribution of new institutional economics abstract once an arcane topic even among environmental economists emissions trading systems have substantially increased during this past decade in the usa moreover the implementation of these systems has necessitated increased involvement of professionals in many fields besides economics this paper reviews the practical experience of the six major types of emissions trading systems focusing on credit market development participation and results including transaction costs five more recent applications of emissions trading also are considered as well as the possibility of inter pollutant trading while inter pollutant trading has been successfully used for chlorofluorocarbons cfcs the applicability of this experience is probably very limited additionally it would be highly premature to attempt an evaluation of these newer emissions trading systems some of which have yet to be even partially implemented in order to improve these latter and future programs the paper considers the potential contribution of the new institutional economics nie to emissions trading the nie is used to develop theoretical insights and a series of predictions about the performance of a range of emissions trading systems

revealing the political decision toward chinese carbon abatement based on equity and efficiency criteria abstract china s economic reform over the past 30 years has allowed the free market to drive economic development however government still plays a key role in the energy sector by allocating energy conservation and emissions abatement how does the government make an equity decision as a tradeoff to market efficiency this is an unanswered question the purpose of this paper is to illustrate the government s preference toward equity and efficiency using the provincial level co 2 intensity allocation data we investigate the political decision that the government made based on the equity and efficiency criteria we find that the equity index plays a more important role than the efficiency index in determining the co 2 intensity target in addition political factors such as social stability are found to be important factors

reducing conflicts between climate policy and energy policy in the us the important role of the states the absence of us national action on global climate change policy has prompted initiatives by the us congress cities states and regions toward what is likely to become a long term collaborative effort to harmonize national energy and climate policies this upward evolution in the face of a reluctant administration is historically consistent with the development of national legislation on other environmental and social issues in the us at the heart of this movement is the need to resolve conflicts between high intensity use of low cost fossil energy supplies and the dominating impact of carbon dioxide emissions on global climate change us states are among the largest carbon dioxide emitters in the world and play a critical role in supplying and transforming energy as well as consuming it for economic advantage state governments are also likely to have to shoulder some of the cost of potentially extensive climate damages and bear the brunt of the cost of implementing future federal mandates as a result many are taking proactive stances on the development of climate mitigation policy to prepare for accelerate and or guide national policy as us states show leadership on addressing greenhouse gas emissions they also play an important role in forging policies and measures that reduce economic conflict between energy and climate goals a number have launched or completed greenhouse gas mitigation plans and other major policies in the past few years that address these conflicts through 1 finding ways to reduce mitigation costs including the use of incentive based policy instruments 2 promoting an open and democratic policy process that includes major stakeholders 3 promoting equity across socioeconomic groups regions and generations and 4 promoting interregional cooperation the results are promising and suggest that the state arena for climate and energy policy is evolving quickly and constructively toward alternatives that reduce conflict regional efforts are also unfolding along with greater congressional attention to the lessons learned and commitments made by sub federal actions in the next few years many national energy and climate conflicts are likely to be tested and addressed by states among these pennsylvania is likely to be an important player due to its high profile of energy production and potential for leadership

underinvestment in a profitable technology the case of seasonal migration in bangladesh hunger during pre harvest lean seasons is widespread in the agrarian areas of asia and sub saharan africa we randomly assign an 8 50 incentive to households in rural bangladesh to temporarily out migrate during the lean season the incentive induces 22 of households to send a seasonal migrant their consumption at the origin increases significantly and treated households are 8 10 percentage points more likely to re migrate 1 and 3 years after the incentive is removed these facts can be explained qualitatively by a model in which migration is risky mitigating risk requires individual specific learning and some migrants are sufficiently close to subsistence that failed migration is very costly we document evidence consistent with this model using heterogeneity analysis and additional experimental variation but calibrations with forward looking households that can save up to migrate suggest that it is difficult for the model to quantitatively match the data we conclude with extensions to the model that could provide a better quantitative accounting of the behavior

labor market dynamics and black white earnings gaps abstract earnings gaps between black and white workers have widened over the past 30 40 years this increase is not explained by differences in observed demographics or the industry and occupational composition of employment we suggest that variation in labor market dynamics between black and white workers are important disparities in job switching job loss and associated wage growth result in flatter career wage profiles for black workers and widening earnings gaps over the work life

will affirmative action policies eliminate negative stereotypes a key question concerning affirmative action is whether the labor market gains it brings to minorities can continue without it becoming a permanent fixture in the labor market the authors argue that this depends on how the policy affects employers beliefs about the productivity of minority workers they study the joint determination of employer beliefs and worker productivity in a model of statistical discrimination in job assignments the authors prove that even when identifiable groups are equally endowed ex ante affirmative action can bring about a situation in which employers correctly perceive the groups to be unequally productive ex post copyright 1993 by american economic association

international equity and differentiation in global warming policy ne of the major obstacles to reaching a comprehensive agreement on global warming is the setting of greenhouse gas emission reduction targets for individual countries long standing tensions between industrialized and developing countries have raised the issue of equity in burden sharing moreover individual industrialized nations have pleaded special circumstances and have sought differentiation in their obligations this paper analyzes alternative rules for distributing tradable carbon dioxide emissions permits a non linear programming model which distinguishes between allocation based and outcome based rules is used to analyze the relative welfare outcomes the model is applied to the world body of nations and yields several important policy implications

food marketing liberalization and trader entry evidence from madagascar abstract food marketing liberalization was expected to induce massive trader entry and competitive markets in africa despite evidence of trader entry enterprise expansion remains difficult and many claim market power persists though perhaps in different hands this paper confronts this puzzle of substantial market entry that might not foster competition data from madagascar reveal distinct groups within rural food marketing channels separated by intraindustry mobility barriers that limit entry to a few niches moreover individuals place within the rural marketing network is defined largely by a priori social identity so the experience of food marketing liberalization varies across socially distinct subpopulations

food price seasonality in africa measurement and extent everyone knows about seasonality but what exactly do we know this study systematically measures seasonal price gaps at 193 markets for 13 food commodities in seven african countries it shows that the commonly used dummy variable or moving average deviation methods to estimate the seasonal gap can yield substantial upward bias this can be partially circumvented using trigonometric and sawtooth models which are more parsimonious among staple crops seasonality is highest for maize 33 percent on average and lowest for rice 16 percent this is two and a half to three times larger than in the international reference markets seasonality varies substantially across market places but maize is the only crop in which there are important systematic country effects malawi where maize is the main staple emerges as exhibiting the most acute seasonal differences reaching the sustainable development goal of zero hunger requires renewed policy attention to seasonality in food prices and consumption

the allocation of co2 emissions as a claims problem abstract in the context of multilateral negotiations on climate change this paper proposes to use the claims approach as a reasonable and practicable alternative in order to allocate the admissible co2 emissions per region the proposed methodology entails analyze the application of a broad group of theoretical solutions through the establishment of equity and stability criteria to this regard the empirical analyzing combines several co2 world endowments from meinshausen et al 2009 together with claims forecasts associated with the rcp representative concentration pathways scenarios the results obtained indicate that the constrained equal awards and minimal solutions are clearly equity sensitive given that the co2 emission reduction imposed by the constrained equal awards solution on asia and the oecd are very important and considering the better balance between equity and proportionality associated with the min solution it could be that this latter solution would be the most practicable and acceptable

equity efficiency trade off in china s energy capping policy abstract as a part of the transition to a sustainable economy china has set a cap on primary energy consumption for the first time of 5 0 billion tonnes of standard coal equivalent by 2020 however there is a debate on the cap feasibility and failure to adequately address the underlying equity efficiency trade off which hampers achievement this paper identifies some key challenges ahead including the coal dominant energy mix declining financial support inconsistent central local goals rising costs of energy saving measures and quality of energy statistical data by quantifying the preference of each providence toward equity based or efficiency based allocation schemes the great disparity among provinces is revealed and the equity efficiency trade off relationship is confirmed developing regions primarily located in central and western areas tend to favor equity based disaggregating schemes contrarily developed coastal provinces strongly favor efficiency based schemes the present national disaggregation schemes are mainly based on historical energy consumption but disregard the provincial development gap and efficiency factors we conclude that this ambitious goal is likely within reach but increased efforts and flexible instruments are needed

shifting sands the changing case for monetizing project food aid in bangladesh abstract monetization involves local sale of food aid commodities and using the cash to finance other programs to explore the likely consequences of monetization this paper combines a stockpile of recent microeconomic evidence from food and cash for work projects in bangladesh together with a multimarket simulation model results suggest that a switch from food for work s ffw in kind deliveries of wheat to an identical wheat financed cash for work cfw program would unambiguously improve welfare of the poor

an aggregate measure for benefit cost analysis the kaldor hicks kh criterion has long been the standard for benefit cost analyses but it has also been widely criticized as ignoring equity and arguably moral sentiments in general we suggest the use of an aggregate measure khm instead of kh where m stands for moral sentiments khm simply adds to the traditional kh criterion the requirement that all goods for which there is a willingness to pay or accept count as economic goods this addition however runs up against objections to counting moral sentiments in general and non paternalistic altruism in particular we show these concerns are unwarranted and suggest that the khm criterion is superior to kh because it provides better information

urban bias in price risk the geography of food price distributions in low income economies the geography of agricultural marketing has important implications for the stochastic distribution of agricultural commodity prices this article proposes that objective food price risk differs between rural and urban areas of infrastructure poor economies characterised by spatially concentrated patterns of foodgrains storage this difference implies an urban bias having adverse welfare effects for peasants who seasonally switch between net food seller and net food buyer positions empirical analysis of rice price data from madagascar suggests that price variability and skewness indeed differ between rural and urban areas in ways that adversely influence the relative welfare of rural peasants

sources of food price volatility and child malnutrition in niger and malawi in recent times considerable attention has been paid to the nutritional impact of the sharp hikes in the international food prices which took place in 2007 8 and 2010 11 while understandable this growing focus has perhaps obscured the impact of other variables affecting malnutrition in sub saharan africa i e the long term impact of agricultural policies on food supply and prices large and persistent seasonal variations in food prices and the impact of famines which still affect parts of the continent this paper focuses on the relative impact of these factors on child malnutrition measured by the number of child admissions to feeding centres in malawi and niger two countries which closely represent the situation of other small landlocked subsistence agricultural economies facing severe food security problems our analysis shows that in these countries the drivers of changes in domestic staple prices and child malnutrition are related not only or not primarily to variations of international food prices but also to the impact of agricultural policies on food production and prices in a persistent food price seasonality and in recurrent and poorly managed famines these factors can exert a strong upward pressure on food prices and child malnutrition even during years of falling international prices

university differences in the graduation of minorities in stem fields evidence from california the low number of college graduates with science degrees particularly among underrepresented minorities is of growing concern we examine differences across universities in graduating students in different fields using student level data on the university of california system during a period in which racial preferences were in place we show significant sorting into majors based on academic preparation with science majors at each campus having on average stronger credentials than their non science counterparts students with relatively weaker academic preparation are significantly more likely to leave the sciences and take longer to graduate at each campus we show the vast majority of minority students would be more likely to graduate with a science degree and graduate in less time had they attended a lower ranked university similar results do not apply for non minority students

seasonality of income and poverty in bangladesh abstract seasonal food deprivation in bangladesh locally known as monga sometimes rises to the level of famine during the pre harvest period of aman rice an analysis of household income and expenditure survey data shows that income and consumption are lower during monga than in other seasons and that seasonal income greatly influences seasonal consumption econometric estimates reject the hypothesis of perfect consumption smoothing in the northwestern region of greater rangpur rural households suffer disproportionately from monga seasonal differences in poverty across regions are due mainly to differences in household specific seasonality of income and consumption income diversification explains the lower incidence of income seasonality observed in non rangpur regions to contain seasonal hunger in greater rangpur public policies should promote rural income diversification together with seasonal migration a flexible microfinance scheme that provides both production and consumption loans on flexible repayment terms could help diversify income and reduce seasonality of income and poverty

the supply of land the supply of land to a use may result from individual suppliers maximizing utility as a consequence the slope of the supply curve cannot be determined a priori supply will be influenced by the distribution of non land income different tenure categories will behave according to the balance of substitution and welfare effects compulsory purchase may be necessary to surmount individual preferences and the effect of a development gains tax on change of use will depend upon the relation between the rate of tax the tax base and the supplier s compensating variation

reducing conflict in global warming policy the potential of equity as a unifying principle abstract international agreement on global warming mitigation is likely to prove difficult efficiency based policies will result in disparate costs and benefits among nations and thus hinder cooperation this paper suggests that consideration be given to an equitable sharing of the economic impacts of global warming policy acknowledging that there is no universally held concept of equity the policy implications of several alternatives are explored because there is considerable variation in these implications it will be important for decision makers to clarify their preferred concepts of equity during the course of their negotiations on policies to address global warming

the liberalization of rice marketing in madagascar abstract madagascar s experience with rice marketing liberalization between 1985 and 1988 illustrates the many obstacles in the way of effective deregulation of agricultural markets the resistance of ambiguous regulation continuing limits on free entry attempts at cartelization and tenacious resistance of existing stakeholders and institutions at the same time the experience shows the ability of higher prices and freer markets to overcome much of this resistance and to stimulate production even in the presence of so called structural constraints such as poor roads weak extension services inadequate credit systems and input supply arrangements