evaluation of drought management in irrigated areas this paper focuses on the economic consequences of droughts for the irrigation sector we develop a dynamic recursive mathematical programming farm model that assumes imperfect mobility of capital and labour as well as rational expectations about future water availability the model is calibrated to 12 representative farms belonging to three irrigation communities of the guadalquivir basin south spain and used to simulate the 1991 1997 period which included 3 years of intense drought results indicate that the drought imposed significant costs on farmers but show also that water managers partly exacerbated these costs by allocating excessive amounts of water to irrigators in the abundant years the model is also used to evaluate the benefits of a perfect water supply forecast and to simulate the economic gains of a voluntary water banking scheme results show that the benefits resulting from the perfect forecast of water supply 1 year ahead would represent a relative gain of 5 however a voluntary banking system would allow farmers to increase their benefits by 32 82 depending on the supply system

beyond carbon pricing the role of banking and monetary policy in financing the transition to a low carbon economy it is widely acknowledged that introducing a price on carbon represents a crucial precondition for filling the current gap in low carbon investment however as this paper argues carbon pricing in itself may not be sufficient this is due to the existence of market failures in the process of creation and allocation of credit that may lead commercial banks the most important source of external finance for firms not to respond as expected to price signals under certain economic conditions banks would shy away from lending to low carbon activities even in the presence of a carbon price this possibility calls for the implementation of additional policies not based on prices in particular the paper discusses the potential role of monetary policies and macroprudential financial regulation modifying the incentives and constraints that banks face when deciding their lending strategy through for instance a differentiation of reserve requirements according to the destination of lending may fruitfully expand credit creation directed towards low carbon sectors this seems to be especially feasible in emerging economies where the central banking framework usually allows for a stronger public control on credit allocation and a wider range of monetary policy instruments than the sole interest rate

pushing the boundaries of climate economics critical issues to consider in climate policy analysis abstract climate policy choices are influenced by the economics literature which analyses the costs and benefits of alternative strategies for climate action this literature in turn rests on a series of choices about the values and assumptions underlying the economic analysis the methodologies for treating dynamics technological change risk and uncertainty and the assumed interactions between economic systems society and the environment including institutional constraints on climate policy we identify and discuss such critical issues pushing at the boundaries of current climate economics research new thinking in this area is gathering pace in response to the limitations of traditional economic approaches and their assumptions on economic behaviour ecological properties and socio technical responses we place a particular emphasis on the role of induced technological change and institutional setups in shaping cost effective climate action that also promotes economic development and the alleviation of poverty

water pricing policies public decision making and farmers response implications for water policy abstract the problems caused by water scarcity demand important changes in the criteria and objectives of water policies the agricultural sector in spain consumes up to 80 of all available hydric resources and the need to increase the efficiency of current uses of water in the agricultural sector is at the core of the country s national water policy one alternative would be to resort to water pricing policies with the aim of providing incentives to save water consumption although it would inflict a certain degree of income losses to the farmers and raise the revenue collected by the water authorities the objective of this research is to analyze the effect caused by the application of different water pricing policies on water demand farmers income and the revenue collected by the government agency to undertake this analysis a dynamic mathematical programming model has been built that simulates farmers behavior and their response to different water pricing scenarios empirical application of the model has been carried out in several irrigation districts in spain covering varied farm regions and river basins results show that the effects of alternative pricing policies for irrigation water are strongly dependent on regional structural and institutional conditions and that changing policies produce distinct consequences within the same region and water district thus equivalent water charges would create widespread effects on water savings farm income and collected government revenue across regions and districts

the inverted pyramid a neo ricardian view on the economy environment relationship abstract in ecological economics natural resources which may contribute only a small amount to gdp are viewed as fundamental to the functioning of the economy they are sometimes pictured as sitting at the base of an inverted pyramid with the rest of the economy balanced on top of them in this paper we show that when prices are set by markup a standard heterodox assumption then the inverted pyramid picture of the economy emerges naturally in a neo ricardian model we demonstrate the use of the model with brief applications to biophysical economics the paper is one of a growing number that use heterodox macroeconomics to address questions in ecological economics

economic mobility and poverty dynamics in developing countries this study provides an introduction to this special issue of the journal of development studies on economic mobility and poverty dynamics in developing countries in addition to providing a conceptual framework it outlines how the contributions fit into the extant literature a series of regularities emerge across these studies the poor consist of those who are always poor poor at all dates and those who move in and out of poverty with the latter group tending to be strikingly large such movements in and out of poverty are apparent when looking at poverty in either absolute or relative terms changes in returns to endowments can be a potent source of increased incomes finally seemingly transitory shocks can have long term consequences the study concludes by drawing out the policy implications of these regularities

green revolution in sub saharan africa implications of imposed innovation for the wellbeing of rural smallholders green revolution policies are again being pursued to drive agricultural growth and reduce poverty in sub saharan africa however conditions have changed since the well documented successes of the 1960s and 1970s benefitted smallholders in southern asia and beyond we argue that under contemporary constraints the mechanisms for achieving improvements in the lives of smallholder farmers through such policies are unclear and that both policy rationale and means of governing agricultural innovation are crucial for pro poor impacts to critically analyze rwanda s green revolution policies and impacts from a local perspective a mixed methods multidimensional wellbeing approach is applied in rural areas in mountainous western rwanda here malthusian policy framing has been used to justify imposed rather than induced innovation the policies involve a substantial transformation for rural farmers from a traditional polyculture system supporting subsistence and local trade to the adoption of modern seed varieties inputs and credit in order to specialize in marketable crops and achieve increased production and income although policies have been deemed successful in raising yields and conventionally measured poverty rates have fallen over the same period such trends were found to be quite incongruous with local experiences disaggregated results reveal that only a relatively wealthy minority were able to adhere to the enforced modernization and policies appear to be exacerbating landlessness and inequality for poorer rural inhabitants negative impacts were evident for the majority of households as subsistence practices were disrupted poverty exacerbated local systems of knowledge trade and labor were impaired and land tenure security and autonomy were curtailed in order to mitigate the effects we recommend that inventive pro poor forms of tenure and cooperation none of which preclude improvements to input availability market linkages and infrastructure may provide positive outcomes for rural people and importantly in rwanda for those who have become landless in recent years we conclude that policies promoting a green revolution in sub saharan africa should not all be considered to be pro poor or even to be of a similar type but rather should be the subject of rigorous impact assessment such assessment should be based not only on consistent objective indicators but pay attention to localized impacts on land tenure agricultural practices and the wellbeing of socially differentiated people

climate change policy what do the models tell us very little a plethora of integrated assessment models iams have been constructed and used to estimate the social cost of carbon scc and evaluate alternative abatement policies these models have crucial flaws that make them close to useless as tools for policy analysis certain inputs e g the discount rate are arbitrary but have huge effects on the scc estimates the models produce the models descriptions of the impact of climate change are completely ad hoc with no theoretical or empirical foundation and the models can tell us nothing about the most important driver of the scc the possibility of a catastrophic climate outcome iam based analyses of climate policy create a perception of knowledge and precision but that perception is illusory and misleading jel c51 q54 q58

climate change financial stability and monetary policy using a stock flow fund ecological macroeconomic model we analyse i the effects of climate change on financial stability and ii the financial and global warming implications of a green qe programme emphasis is placed on the impact of climate change damages on the price of financial assets and the financial position of firms and banks the model is estimated and calibrated using global data and simulations are conducted for the period 2015 2115 four key results arise first by destroying the capital of firms and reducing their profitability climate change is likely to gradually deteriorate the liquidity of firms leading to a higher rate of default that could harm both the financial and the non financial corporate sector second climate change damages can lead to a portfolio reallocation that can cause a gradual decline in the price of corporate bonds third financial instability might adversely affect credit expansion and the investment in green capital with adverse feedback effects on climate change fourth the implementation of a green qe programme can reduce climate induced financial instability and restrict global warming the effectiveness of this programme depends positively on the responsiveness of green investment to changes in bond yields

irrigation water pricing differential impacts on irrigated farms european water policy as set out in the water framework directive wfd requires all eu member states to implement volumetric water pricing at rates that roughly cover the total costs of providing water services the objective of this paper is to develop a methodology that for the different types of farm in an irrigable area will enable us to analyse the differential impact that a pricing policy for irrigation water would have for this purpose multi attribute utility theory maut mathematical programming models were used the methodology is implemented on a representative area in the duero valley in spain our results show the usefulness of differential analysis in evaluating the impact of a water pricing policy this allows significant differences in the evolution of agricultural incomes to be observed as well as the recovery of costs by the state demand for agricultural employment and the consumption of agrochemicals resulting from rising prices of irrigation water in various groups of farmers within a given irrigated area

post keynesian stock flow consistent modelling a survey the aim of the paper is to provide an overview of the current stock ow consistent sfc literature indeed we feel the sfc approach has recently led to a blossoming literature requiring a new summary after the work of dos santos and above all after the publication of the main reference work on the methodology godley and lavoie s monetary economics an integrated approach to credit money income production and wealth the paper is developed along the following lines first a brief historical analysis investigates the roots of this class of models that can be traced as far back as 1949 and the work of copeland second the competing points of view regarding some of its main controversial aspects are underlined and used to classify the different methodological approaches followed in using these models namely we discuss i how the models are solved ii the treatment of time and its implication and ii the need or not for microfoundations these results are then used in the third section of the paper to develop a bifocal perspective which allows us to divide the literature reviewed according to both its subject and the methodology we explore various topics such as financialisation exchange rate modelling policy implication the need for a common framework within the post keynesian literature and the empirical use of sfc models finally the conclusions present some hypotheses and wishes for the possible lines of development of sfc models

combining quantitative and qualitative methods in assessing chronic poverty the case of rwanda this paper addresses the issue of chronic poverty in rwanda an issue which has not been addressed specifically in the policy debate despite the fact that it is likely to be widespread in part this has reflected lack of available evidence in that the conventional sources used to analyze chronic poverty are not available we argue in this paper that by judicious combination of existing qualitative a high quality nationwide participatory poverty assessment and quantitative sources a household survey it is possible to identify and characterize a clearly distinct group of chronically poor households whose characteristics are different from the poor as a whole

looking at pro poor growth from an agricultural perspective summary pro poor growth has been identified as one of the most promising pathways to accelerate poverty reduction in developing countries the diagnostic pro poor growth toolbox has so far focused on the income dimension as well as key non income achievements in education and health this article contributes to the literature by expanding the toolbox with several new measures that take into account the extraordinary importance of agricultural productivity for poverty reduction in developing countries we distinguish between land productivity and labor productivity and find that the poor identified by low incomes poor education outcomes low land productivity and low labor productivity overlap only to a small degree suggesting that analyses of pro poor growth from these different perspectives are complementary the toolbox is then applied to three comparable household surveys from rwanda eicv data for the years 1999 2001 2005 06 and 2010 11 a country that has experienced impressive economic growth since the genocide in the mid 1990s and that has undertaken considerable efforts to increase agricultural productivity and improve the population s access to social services over the first decade of the 2000s our application shows that the enormous progress made in the income education and health dimension of well being has been pro poor according to most definitions of the concept the new tools reveal that the land productivity poor experienced pro poor growth in the relative and absolute sense while the labor productivity poor increased their labor productivity relatively but not absolutely faster than the labor productivity rich even though the former dispose of considerably lower education levels

poverty in palanpur the meaning and identification of poverty are examined using three indicators of standard of living in the north indian village of palanpur the first is intended as a measure of apparent prosperity based on the personal assessments of investigators after intensive field work in the village over the full agricultural year 1983 84 the other two are income in 1983 84 and a measure of permanent income obtained by averaging incomes from four surveys conducted over a twenty six year interval a comparison of these three indicators shows that income measured in any one year may give a misleading impression of the incidence of poverty the risk of poverty for households is calculated vulnerability is high among low caste households and those which are involved in agricultural labor categories however are not homogeneous for example whereas the landless and widows are more likely to be poor some of such households are quite well off it is argued that poverty in a good agricultural year is a better indicator of sustained poverty than poverty in a bad year occupational mobility out of agricultural labor is low and changes in the distribution of land are largely accounted for by demographic processes such as household splits

simulating the impact of policy upon chronic and transitory poverty in rural pakistan anti poverty programmes often seek to improve their impact by targeting households for assistance according to welfare measures in a single time period however a growing literature shows the importance to poor households of fluctuations in their welfare from month to month and year to year this study uses a five year panel of 686 households from rural pakistan to investigate the magnitude of chronic or transitory poverty making an explicit adjustment for measurement error the impact of two types of policies those designed to smooth incomes and those designed to promote income growth on the severity of chronic and transitory poverty is examined since the largest part of the squared poverty gap in our sample is transitory large reductions in poverty can be achieved by interventions designed to smooth incomes but reducing chronic poverty in the long term requires large and sustained growth in household incomes the level and variability of incomes is then modelled as a function of household char

a monetary minsky model of the great moderation and the great recession abstract steve keen s model of minsky s financial instability hypothesis keen 1995 displayed qualitative characteristics that matched the real macroeconomic and income distributional outcomes of the preceding and subsequent fifteen years a period of economic volatility followed by a period of moderation leading to a rise of instability once more and a serious economic crisis this paper extends that model to build a strictly monetary macroeconomic model which can generate the monetary as well as the real phenomena manifested by both the great recession and the great moderation

water use in the spanish economy an input output approach against the background of the water limitations that often appear in spain the aim of this paper is to study the behaviour of the productive sectors of the spanish economy as direct and indirect consumers of water to that end we employ input output analysis with the particular methodology being based on the linkages analysis known as the hypothetical extraction method hem we have introduced three modifications to this method first the valuation is made in terms of water consumption secondly we obtain the components of the impacts of each block of activity into which the economy is divided with these components being described as the internal effect mixed linkage net or external backward linkage and net or external forward linkage thirdly this methodology is used to detect key sectors our results confirm the marked importance of the agriculture food and other services blocks as regards the direct and indirect consumption of water in general we also find that other services chemicals metals and electronics and agriculture blocks play an important role in explaining the consumption of drinking water moreover the hem analysis allows us to classify productive sectors according to their forward or backward linkage character in a way that is more precise than that permitted by earlier methods finally this methodology can be extended to other types of environmental pressures 2002 elsevier science b v all rights reserved

assessing the extent and nature of chronic poverty in low income countries issues and evidence discussions of chronic poverty have mostly considered its monetary dimensions with current evidence suggesting that such poverty is much more transient than chronic but chronic poverty is a real and important phenomenon potentially more important quantitatively than it first appears once account is taken of different methodological approaches and inevitable measurement difficulties the chronic poor have distinctive characteristics such as lack of assets or high dependency rates which may account for their persistent poverty the paper argues that it is also necessary to develop concepts of chronic poverty further covering relevant nonmonetary dimensions and not just relying on panel data

network connectedness of green bonds and asset classes abstract we identify network connectedness between green bonds and different asset classes over different investment horizons in the eu and us asset markets we first focus on dynamic correlations between green bond and asset class price changes in different time scales on the basis of wavelet coherence we then identify network connectedness by decomposing time series into different frequency components in each of which we evaluate connectedness on the basis of the error variance decomposition of a multivariate vector autoregressive model our empirical evidence reveals strong connectedness between green bonds and treasury and corporate bonds in the short and long run and in both the eu and the usa with green bonds receiving sizeable spillovers from treasury and corporate bond prices and transmitting negligible effects likewise we find that green bonds are weakly connected with high yield corporate bond stock and energy assets over different time scales these findings have implications for green bond investors regarding portfolio design and hedging decisions and for the channelling of financial flows to economic activities that are consistent with a decarbonized economy

combining participatory crop trials and experimental auctions to estimate farmer preferences for improved common bean in rwanda abstract participatory crop improvement raises the prospects for developing seed varieties that meet the needs of subsistence farmers but may face challenges regarding preference elicitation particularly in complicated policy environments we integrate binding experimental auctions with participatory variety selection to elicit farmers preferences for improved common bean varieties in rwanda we find that auctions reveal farmer preferences more accurately than stated nonbinding rankings in this context and that participatory on farm crop research is essential to understanding how farmers evaluate tradeoffs between multiple crop attributes we also find that farmers highly value intercrop yield despite government policy that encourages farmers to monocrop

refuting two claims about virtual water trade abstract using the heckscher ohlin trade model i refute two prominent but incorrect claims on virtual water trade these claims are that virtual water trade i levels uneven water distribution and ii reduces the potential for water conflict both claims are based on an incorrect understanding of comparative advantage in the production of water intensive goods the results show that both claims only hold under certain conditions but do not necessarily follow from the heckscher ohlin trade model

a theory of the consumption function with and without liquidity constraints fifteen years ago milton friedman s 1957 treatise a theory of the consumption function seemed badly dated dynamic optimization theory had not been employed much in economics when friedman wrote and utility theory was still comparatively primitive so his statement of the permanent income hypothesis never actually specified a formal mathematical model of behavior derived explicitly from utility maximization instead friedman relied at crucial points on intuition and verbal descriptions of behavior although these descriptions sounded plausible when other economists subsequently found multiperiod maximizing models that could be solved explicitly the implications of those models differed sharply from friedman s intuitive description of his model furthermore empirical tests in the 1970s and 1980s often rejected these rigorous versions of the permanent income hypothesis in favor of an alternative hypothesis that many households simply spent all of their current income today with the benefit of a further round of mathematical and computational advances friedman s 1957 original analysis looks more prescient than primitive it turns out that when there is meaningful uncertainty in future labor income the optimal behavior of moderately impatient consumers is much better described by friedman s original statement of the permanent income hypothesis than by the later explicit maximizing versions furthermore in a remarkable irony much of the empirical evidence that rejected the permanent income hypothesis as specified in tests of the 1970s and 1980s is actually consistent both with friedman s original description of the model and with the new version with serious uncertainty there are four key differences between the explicit maximizing models

saving and liquidity constraints this paper is concerned with the theory of saving when consumers are not permitted to borrow and with the ability of such a theory to account for some of the stylized facts of saving behavior the models presented in the paper seem to account for important aspects of reality that are not explained by traditional life cycle models copyright 1991 by the econometric society

cooperation in common property regimes under extreme drought conditions empirical evidence from the use of pooled transferable quotas in spanish irrigation systems the success of a common property regime can be partially judged on the basis of its ability to handle extreme events that stress its capacity for cooperation this paper compares the performance of 38 irrigation associations in a large irrigation area in spain during a severe drought as a test of hypotheses derived from property right theories the case is particularly interesting because it contains a transferable quota institution that can potentially strengthen the effectiveness of common property regimes in scarcity conditions according to the results the use of transferable quotas across associations can contribute to cooperation and drought performance in this context performance is higher when the associations enjoy 1 effective monitoring systems 2 experience and legitimate leaders and 3 facilitative biophysical conditions like soil water holding capacity the analysis also suggests that biophysical properties like soil water holding capacity may compensate for weaker monitoring or leadership and vice versa

analysing andalusian virtual water trade in an input output framework dietzenbacher e and velazquez e 2007 analysing andalusian virtual water trade in an input output framework regional studies 41 1 12 andalusian agricultural sectors are relatively small but account for 90 of annual water consumption more than 50 of the agricultural final demands is exported to other spanish regions or abroad using the concept of virtual water within an input output framework it is found that a substantial part of andalusian water consumption is embodied in its exports considering the virtual water content of its trade andalusia is a net exporter of water examining regional policy aspects a reduction in the exports abroad of agricultural products yields considerable benefits in terms of water savings while the negative effects are only moderate dietzenbacher e et velazquez e 2007 une analyse des echanges andalous d eau virtuelle dans le contexte d un tableau d echanges interindustriels regional studies 41 1 12 les secteurs agricoles andalous sont relativement petit

the eirin flow of funds behavioural model of green fiscal policies and green sovereign bonds abstract fiscal and monetary policies as well as new financial instruments could play a key role to meet the paris agreement however deep uncertainty characterizes their design and their potential effects on growth financial and credit market stability and inequality we develop the eirin flow of funds behavioural model to simulate the introduction of green fiscal policies and green sovereign bonds and we display their effects on firms investments in the brown and green sector on unemployment on the credit and bonds market eirin is stock flow consistent and is rooted on a balance sheet approach it adopts a leontief production function with no substitution of the production factors i e labour capital and raw materials its sectors are endowed with adaptive behaviours and expectations and interact with the others and the foreign sector through a set of markets simulations show that green public policies can promote green growth by influencing firms expectations and the credit market green sovereign bonds represent a short term win win solution while green fiscal measures have higher immediate distributive effects that induce negative feedbacks on the economy these results are influenced by the conditions fiscal budgetary and public debt gdp in which both measures are implemented

infrastructure provision gender and poverty in indian slums we examine the relationship between infrastructure provision and poverty alleviation by analyzing 500 interviews conducted in serviced and non serviced slums in india using a mixed method approach of qualitative analysis and regression modeling we find that infrastructure was associated with a 66 increase in education among females service provision increased literacy by 62 enhanced income by 36 and reduced health costs by 26 evidence suggests that a gender sensitive consideration of infrastructure is necessary and that a one size fits all approach will not suffice we provide evidence that infrastructure investment is critical for well being of slum dwellers and women in particular

an input output model of water consumption analysing intersectoral water relationships in andalusia abstract this paper presents an input output model of sectoral water consumption created by combining the extended leontief input output model with the model of energy use developed by proops the analysis is applied to andalusia a region situated in the south of spain which is characterized by water shortage we determine which economic sectors consume the greatest quantities of water both directly and indirectly and to what extent this natural resource may become a limiting factor in the growth of certain production sectors the model allows us to distinguish between direct and indirect consumption thus offering the possibility of designing an economic and environmental policy oriented towards water saving additionally the model allows simulation of possible changes in water consumption caused by certain environmental measures as well as their consequences on the regional economy

the globalization of virtual water flows explaining trade patterns of a scarce resource abstract water availability is paramount for security and development yet many countries suffer from water scarcity virtual water trade or trade in water embedded agricultural commodities has been considered a means for countries to overcome water deficits provided they can import food rather than produce locally despite a rich literature research on the subject has not reached a consensus on whether virtual water trade is actually driven by relative water endowment differentials e g countries seeking to alleviate pressure on their own resources or by comparative advantage in water utilization e g countries using their most abundant and cheap factors of production understanding what drives virtual water trade would support water management policies in targeting the roots of water depletion excessive use due to lack of other available inputs and bad water management due to absence of water use regulation using panel data of bilateral virtual water trade flows from 1994 to 2007 applied to a gravity model we first demonstrate that arid countries do resort to trade as a means to alleviate water scarcity second we demonstrate that there is much inefficiency in water use in some countries where other agricultural inputs land labor are available and cheap given the increased urgency related to global water scarcity our results suggest how agricultural production and trade could help countries preserve and better use precious water resources

green bond and financial markets co movement diversification and price spillover effects abstract we examine co movement between the green bond and financial markets finding that the green bond market couples with corporate and treasury bond markets and weakly co moves with stock and energy commodity markets we also find that green bonds have negligible diversification benefits for investors in corporate and treasury markets whereas diversification benefits are sizeable for investors in stock and energy markets we further confirm that green bonds are affected by substantial price spillovers from corporate and treasury fixed income markets and that large price swings in stock and energy markets have a negligible impact on green bond prices

water scarcity and food import a case study for southern mediterranean countries abstract taking six southern mediterranean countries as a case study this paper addresses the water food challenges facing water scarce countries and the implications for the world food economy by accounting the volume of virtual water embedded in food imports into the countries concerned a close relationship between water endowment and food import dependence is elaborated a projection of the cereal demand suggests an increment of 40 60 percentage points in these countries by 2020 above their 1998 99 levels raising the aggregate volume of cereal imports to around 40 million tons the analysis also finds that the trend of shifting from staple grain crops to higher value cash crops was weak during the past two decades a deteriorating trade deficit for both cereal and noncereal agricultural products was evident in almost all the countries suggesting a rigid and persistent constraint of water scarcity on overall agricultural development the results of this case study highlight two important points a food imports are imperative for compensating water resource deficiency b water scarcity related food imports will continue to expand and impose increasing impacts on the global food economy

a stock flow fund ecological macroeconomic model this paper develops a stock flow fund ecological macroeconomic model that combines the stock flow consistent approach of godley and lavoie with the flow fund model of georgescu roegen the model has the following key features first monetary and physical stocks and flows are explicitly formalised taking into account the accounting principles and the laws of thermodynamics second georgescu roegen s distinction between stock flow and fund service resources is adopted third output is demand determined but supply constraints might arise either due to environmental damages or due to the exhaustion of natural resources fourth climate change influences directly the components of aggregate demand fifth finance affects macroeconomic activity and the materialisation of investment plans that determine ecological efficiency the model is calibrated using global data simulations are conducted to investigate the trajectories of key environmental macroeconomic and financial variables under i different assumptions about the sensitivity of economic activity to the leverage ratio of firms and ii different types of green finance policies

multi criteria modelling of irrigation water market at basin level a spanish case study abstract this paper develops a multi criteria methodology to simulate irrigation water markets at basin level for this purpose it is assumed that irrigators try to optimise personal multi attribute utility functions via their productive decision making process crop mix subject to a set of constraints based upon the structural features of their farms in this sense farmers with homogeneous behaviour regarding water use have been grouped such groups being established as types to be considered in the whole water market simulation model this model calculates the market equilibrium through a solution that maximises aggregate welfare which is quantified as the sum of the multi attribute utilities reached by each of the participating agents this methodology has been empirically applied for the duero basin northern spain finding that the implementation of this economic institution would increase economic efficiency and agricultural labour demand particularly during droughts

valuing the impact of trade on local blue water international trade of agricultural goods impacts local water scarcity by quantifying the effect of trade on crop production on grid cell level and combining it with cell and crop specific virtual water contents we are able to determine green and blue water consumption and savings connecting the information on trade related blue water usage to water shadow prices gives us the possibility to value the impact of international food crop trade on local blue water resources to determine the trade related value of the blue water usage we employ two models first an economic land and water use model simulating agricultural trade production and water shadow prices and second a global vegetation and agricultural model modeling the blue and green virtual water content of the traded crops our study found that globally the international trade of food crops saves blue water worth 2 4 billion us this net saving occurs despite the fact that europe exports virtual blue water in food crops worth 3 1 billion us countries in the middle east and south asia profit from trade by importing water intensive crops countries in southern europe on the other hand export water intensive agricultural goods from water scarce sites deteriorating local water scarcity

spot water markets and risk in water supply water availability patterns in semiarid regions are typically extremely variable even in basins with a highly developed infrastructure users are subject to unreliable water supplies incurring substantial economic losses during periods of scarcity more flexible instruments such as voluntary exchanges of water among users can help users to reduce risk exposure this article looks at the effects of spot water markets on the economic risk caused by water availability variations our theoretical and empirical risk analyses are based on the random profits of water users profit probability density functions are formally and graphically characterized for both water sellers and buyers under several possible market outcomes we conclude from this analysis that where water supply is stochastic water markets unambiguously reduce both parties risk exposure the empirical study is conducted on an irrigation district in the guadalquivir valley southern spain where there is a high probability of periods of extreme water scarcity water demand functions for the district representative irrigators and a spatial equilibrium model are used to simulate market exchanges and equilibrium this programming model is combined with statistical simulation techniques we show that the profit probability distribution of a representative irrigator is modified if water exchanges are authorized leading to risk reductions results also indicate that if the market were extended to several districts and users that are subject to varying hydrological risk exposure extremely low profit events would be less likely to occur in sum we show that exchanging water in annual spot markets can reduce farmers economic vulnerability caused by water supply variability across irrigation seasons these results support the water policy reform carried out in spain in 1999 to allow for voluntary water exchanges among right holders

relationship between green bonds and financial and environmental variables a novel time varying causality abstract in this paper we examine the time varying causal relationship between green bonds and other assets including us conventional bonds wilderhill clean energy equity index and co2 emission allowances price during the period spanning from 30 july 2014 to 10 february 2020 we apply the novel time varying granger causality test shi et al 2018 based on the recursive evolving algorithm introduced by phillips et al 2015a 2015b for controlling financial bubbles to detect real time causality detecting possible changes in the causal direction and dating financial turbulences the study based on this algorithm reveals a significant causality running from the us 10 year treasury bond index to green bonds starting from the end of the year 2016 until the end of the sample period besides we find that the link co2 emission allowances price causing green bonds is significant from the beginning of the sample period to the end of the year 2015 furthermore by using the recursive evolving causality algorithm of the shi et al 2018 test we find that the causality running from the clean energy index to green bonds is very limited to the year 2019 on the other hand there is no significant causality running from green bonds to all considered assets indicating no predictive power for this asset in its proper domain which is not yet examined in the literature

the impact of phasing out fossil fuel subsidies on the low carbon transition abstract there is growing consensus on the fact that fossil fuel subsidies provided by governments in high income countries represent a misalignment on emissions reduction with the global climate agenda in addition a discussion emerged on the negative socio economic and environmental externalities associated with fossil fuel subsidies nevertheless pathways for phasing out fossil fuel subsidies in high income countries and their implications on the low carbon transition have not yet been assessed with the aim to narrow this knowledge gap we extend the eirin stock flow consistent behavioral model to study the implications on sustainable development of the gradual phasing out of fossil fuels subsidies whose revenues could be used by the government to subsidize energy investments in green capital e g solar panels either via fiscal policies or green bonds we assess the effects on green growth employment credit and bonds market as well as the distributive effects across heterogeneous households and sectors a smooth phasing out of fossil fuels subsidies contributes to improve macroeconomic performance to decrease inequality and helps the government to find fiscal space to support stable renewable energy policies renewable energy subsidies contribute to foster the low carbon transition but could imply distributive effects depending on the way in which they are implemented

the effect of pro environmental preferences on bond prices evidence from green bonds abstract we use green bonds as an instrument to identify the effect of non pecuniary motives specifically pro environmental preferences on bond market prices we perform a matching method followed by a two step regression procedure to estimate the yield differential between a green bond and a counterfactual conventional bond from july 2013 to december 2017 the results suggest a small negative premium the yield of a green bond is lower than that of a conventional bond on average the premium is 2 basis points for the entire sample and for euro and usd bonds separately we show that this negative premium is more pronounced for financial and low rated bonds the results emphasize the low impact of investors pro environmental preferences on bond prices which does not represent at this stage a disincentive for investors to support the expansion of the green bond market

are virtual water flows in spanish grain trade consistent with relative water scarcity abstract virtual water adds a new dimension to international trade and brings along a new perspective about water scarcity and water resource management most virtual water literature has focused on quantifying virtual water flows and on its application to ensure water and food security nevertheless the analysis of the potential gains from international trade at least from a water resources perspective needs to take into account both spatial and temporal variations of blue groundwater and stream flow and green soil moisture water as well as the socioeconomic and policy conditions this paper evaluates whether spanish international trade with grains is consistent with relative water scarcity for this purpose the study estimates the volume and economic value of virtual water flow through international grain trade for the period 1997 2005 which includes 3 years with different rainfall levels the calculations show that spain is a net virtual water importer through international grain trade the volume of net virtual water imports amounts to 3420 4383 and 8415 million m 3 in wet 1997 medium 1999 and dry 2005 years respectively valuing blue water at its shadow price or scarcity value blue water exports oscillate between 0 7 and 34 2 million euros for a wet and dry year respectively overall grain trade is apparently consistent with relative water scarcity as net imports increase in dry years however the evolution of grain exports expressed as a variation in quantity and volume does not match the variations in resource scarcity a disaggregated crop analysis reveals that there are other factors such as quality product specialization or the demand for a standardized product which also influence trade decisions and are not included in the notion of virtual water these facts among others can therefore create potential distortions in the application of virtual water to the analysis of specific trade patterns nevertheless from a water resources perspective virtual water can bring important insights across countries for improving water and land management globally fostering adaptation strategies to climate change and to transboundary resource management

ten years of q squared implications for understanding and explaining poverty summary over the past decade there have been a number of initiatives to promote a more systematic integration of quantitative and qualitative or q squared approaches to poverty analysis in the global south and a large body of literature had emerged the objective of the article is to present a selective review of this empirical work with a view to demonstrate the value it has added for understanding and explaining poverty the evidence strongly suggests that q squared approaches have aided our understanding of the characteristics of the poor and the causes of poverty

china and trans pacific partnership agreement countries estimation of the virtual water trade of agricultural products abstract the trans pacific partnership agreement tppa is one of the most important multilateral free trade and investment agreements in recent years although as a major economic power in the asia pacific region china has yet to join the tppa existing research on china and tppa countries has mainly been conducted from political and economic perspectives this paper first reports the relationship between china and tppa countries from the perspective of virtual water trade of agricultural products and completes a diachronic analysis from 2001 to 2014 the results indicate that china was in virtual water trade surplus with tppa countries for agricultural products and that the surplus had an expansion trend the exported virtual water totalled 7 47 billion m 3 y whereas 63 45 billion m 3 y was embedded in imported products malaysia was the biggest virtual water surplus partner of china and japan was the biggest virtual water deficit partner additionally the proportion of the grey water footprint of agricultural products that china exported to tppa countries was about five times higher than that imported from tppa countries it reflected the difference of agricultural science and technology moreover the products structure of china s virtual water trade was not reasonable and was excessively focused on several products finally with respect to environmental and water allocation ethics tppa countries were classified into four types in terms of net import and water abundance mutual benefit countries australia canada new zealand the united states malaysia and chile unilateral benefit countries peru and brunei supported countries japan and singapore and double pressure countries mexico and vietnam with respect to the virtual water trade of agricultural products there is a close relationship between china and tppa countries the virtual water trade promotes the sustainability of water resources and the findings are conducive to the adjustment of trade structure to achieve optimal state of ecology economy and politics

on modeling and interpreting the economics of catastrophic climate change with climate change as prototype example this paper analyzes the implications of structural uncertainty for the economics of low probability high impact catastrophes even when updated by bayesian learning uncertain structural parameters induce a critical tail fattening of posterior predictive distributions such fattened tails have strong im plications for situations like climate change where a catastrophe is theoretically possible because prior knowledge cannot place sufficiently narrow bounds on overall damages this paper shows that the economic consequences of fat tailed structural uncertainty along with unsureness about high temperature damages can readily outweigh the effects of discounting in climate change policy analysis

does credit create a growth imperative a quasi stationary economy with interest bearing debt abstract this paper addresses the question of whether a capitalist economy can ever sustain a stationary or non growing state or whether as often claimed capitalism has an inherent growth imperative arising from the charging of interest on debt we outline the development of a dedicated system dynamics macro economic model for describing financial assets and liabilities in a stock flow consistent framework falstaff and use this model to explore the potential for stationary state outcomes in an economy with balanced trade credit creation by banks and private equity contrary to claims in the literature we find that neither credit creation nor the charging of interest on debt creates a growth imperative in and of themselves this finding remains true even when capital adequacy and liquidity requirements are imposed on banks we test the robustness of our results in the face of random variations and one off shocks we show further that it is possible to move from a growth path towards a stationary state without either crashing the economy or dismantling the system nonetheless there remain several good reasons to support the reform of the monetary system our model also supports critiques of austerity and underlines the value of countercyclical spending by government

a gravity model of virtual water trade this work investigates the determinants of virtual water trade vwt ows by means of an estimated gravity model of trade applied to the virtual water embodied in the agricultural goods exchanged across countries in line with the recent literature on the gravity model the paper presents a battery of estimation methods cross section and panel ols and pseudo maximum likelihood with and without two way xed eects the analysis shows that bilateral vwt ows are aected by the classical determinants of trade but also by national water endowments as well as by the level of pressure on water resources these general ndings are robust even though some variation can be observed across the estimation methods and in particular when smaller sub samples of countries such as continents and regional groups are considered this contributes to account for the mixed evidence in the literature on the importance of water endowments for the vwt ows