commodity prices trade and poverty in uruguay abstract the 2006 2008 food price spike raised concerns about the impact of high commodity prices on poverty in developing countries this paper addresses these concerns in relation to uruguay a small country that exports agricultural commodities and imports fuels applying a general equilibrium model we find that as a whole an increase in commodity prices has a positive effect on the economy of uruguay benefits obtained through a growth in export activities are partially outweighed by an increase in crude oil prices in this context extreme poverty increases as in other countries the increase in food prices affects the already poor population who become even poorer this fact highlights the need for policies that mitigate the negative effects of price shocks

rethinking the global food crisis the role of trade shocks although fundamental factors were clearly responsible for shifting the world to a higher food price equilibrium in the years leading up the 2008 food crisis there is little doubt that when food prices peaked in june of 2008 they soared well above the new equilibrium price numerous arguments have been proposed to explain overshooting including financial speculation depreciation of the united states us dollar low interest rates and reductions in grain stocks however observations that international rice prices surged in response to export restrictions by india and vietnam suggested that trade related factors could be an important basis for overshooting especially given the very tangible link between export volumes and export prices in this paper we revisit the trade story by closely examining monthly data from thailand the largest exporter of rice and the united states the largest exporter of wheat and maize and the third largest exporter of soybeans in all cases except soybeans we find that large surges in export volumes preceded the price surges the presence of these large demand surges together with back of the envelope estimates of their price impacts suggests that trade events played a much larger and more pervasive role than previously thought

agricultural price instability a survey of competing explanations and remedies there are two explanations for agricultural price dynamics one follows cobweb logic and models fluctuations driven by expectation errors but emphasises that these expectations create complex dynamics and possibly chaos the other stems from the rational expectations tradition of dynamics driven by real shocks the empirical evidence tends to support the latter but is not conclusive the rational expectations model generates an optimal dynamic path from which no improvement can be expected from public intervention however if we take account of all the potential market failures in agricultural markets and especially in developing countries this conclusion might require some qualifications although an appropriate policy design for stability has still to be achieved this paper surveys the positive and normative literature on agricultural prices highlighting empirical evidence and identifying remaining unresolved issues

the future of food demand understanding differences in global economic models understanding the capacity of agricultural systems to feed the world population under climate change requires projecting future food demand this article reviews demand modeling approaches from 10 global economic models participating in the agricultural model intercomparison and improvement project agmip we compare food demand projections in 2050 for various regions and agricultural products under harmonized scenarios of socioeconomic development climate change and bioenergy expansion in the reference scenario ssp2 food demand increases by 59 98 between 2005 and 2050 slightly higher than the most recent fao projection of 54 from 2005 2007 the range of results is large in particular for animal calories between 61 and 144 caused by differences in demand systems specifications and in income and price elasticities the results are more sensitive to socioeconomic assumptions than to climate change or bioenergy scenarios when considering a world with higher population and lower economic growth ssp3 consumption per capita drops on average by 9 for crops and 18 for livestock the maximum effect of climate change on calorie availability is 6 at the global level and the effect of biofuel production on calorie availability is even smaller

did the commodity price spike increase rural poverty evidence from a long run panel in bangladesh we assess the effects of the dramatic rise in agricultural commodity prices during 2007 2008 on income dynamics and poverty among rural households in bangladesh a unique panel data set allows us to put the effects of recent events in the context of long run trends in income and poverty we use data from a nationally representative longitudinal survey of rural households in bangladesh collected in four waves in 1988 2000 2004 and 2008 nargis and hossain nargis n hossain m 2006 income dynamics and pathways out of rural poverty in bangladesh 1988 2004 agric econ 35 425 435 analysed income dynamics and poverty incidence for the first three waves finding a declining trend in both the incidence and severity of poverty aided in particular by human capital development and off farm employment opportunities we update and extend the analysis to include data collected in 2008 at the height of a spike in agricultural prices we find that the price of a balanced food basket increased by more than 50 during 2000 2008 while household income rose only 15 as a result the incidence and severity of rural poverty in bangladesh sunk to pre 2000 levels during 2004 2008 thus the price spikes in 2007 2008 helped push an additional 13 million people into poverty in rural bangladesh moreover we find that the determinants of poverty have not been time invariant in particular agricultural production which had previously been associated with a higher incidence of poverty served as a hedge against higher food prices during 2004 2008

period specific volatility spillover based connectedness between oil and other commodity prices and their portfolio implications abstract this paper analyses the changing impact of oil price shocks on a bouquet of metal and agro prices and their implications for investment decisions during different oil price regimes separated by structural breaks endogenously identifying the structural breaks we use network analysis to decipher the nature and extent of such shock transfer across different sub periods we suggest optimal portfolios based on conditional variance estimates to hedge oil shocks during each period this is the first study to analyse the portfolio decisions during specific oil price regimes the results are of significant interest to investors and policy makers

evaluating the impact of rising fertilizer prices on crop yields because of tensions on fossil energy and phosphorus markets the rise in fertilizer prices observed during the last decades may continue in the future putting into question production pathways relying heavily on crop intensification to evaluate how in this context economic choices may alter crop yields we first construct different fertilizer price scenarios to 2050 based on an econometric relation with oil and gas prices other possible scenarios such as the continuation of historical trends are also considered the resulting changes in fertilizer price range between 0 8 and 3 6 per year over the 2005 2050 period these scenarios are tested in a global land use model incorporating an endogenous representation of the land fertilizer substitution we find that the supply side response to rising fertilizer prices could lower crop yields in 2050 from 6 to 13 with a corresponding increase in global cropland area ranging between 100 and 240 mha if the demand for food and nonfood products has to be met the sensitivity of these results is tested with regard to assumptions on food consumption change in potential yield and nutrient use efficiency resume d auteur

a global vector autoregression model for the analysis of wheat export prices food commodity price fluctuations have an important impact on poverty and food insecurity across the world conventional models have not provided a complete picture of recent price spikes in agricultural commodity markets and there is an urgent need for appropriate policy responses perhaps new approaches are needed to better understand international spill overs the feedback between the real and the financial sectors as well as the link between food and energy prices in this article we present the results from a new worldwide dynamic model that provides the short and long run impulse responses of the international wheat price to various real and financial shocks

the effect of carbon tax on farm income comment olale et al environ resour econ 605 623 2019 argue that the introduction of a carbon tax substantially reduced farm income in the canadian province of british columbia in this comment we raise serious concerns with their data empirical methods and theory most importantly olale et al 2019 assume that the difference in farm income between british columbia and the rest of canada would have remained constant over time without the introduction of the carbon tax we provide evidence that this is unlikely to be true and show that their results disappear when we account for differential trends we conclude that the estimates in olale et al 2019 do not represent the effect of a carbon tax on farm income

the impact of the 2005 2010 rice price increase on consumption in rural bangladesh this article studies the impact of the rice price increase between 2005 and 2010 on consumption in rural bangladesh using the household income and expenditure survey hies data we compare net rice buyers and sellers to self sufficient households to identify the effect of rice price changes on household consumption of rice nonrice food and nonfood items we employ a difference in differences did technique our findings indicate that the surge in domestic rice prices between 2005 and 2010 reduced the nonrice food consumption of net rice buyer households by 7 compared to the households who are self sufficient in rice production however it did neither affect their rice nor their nonfood consumption in contrast while we find no significant effect of rice price increases on the rice consumption of net rice sellers we observe a 9 increase in their nonrice food consumption in such situation a subsidy on low quality rice may be effective in fulfilling the nutritional requirement of low income households

the fossil episode abstract agriculture sector output biocarbon is a good substitute for oil in energy production but oil cannot be used as food this one way substitutability is analyzed in a dynamic general equilibrium model it features three endogenous phases a pure fossil a mixed fossil and biocarbon and an absorbing biocarbon fuel only phase in the latter two the demand for biocarbon as fuel leads to increasing food prices depending on how easily capital and labor can reallocate food prices increase by between 40 and 240 the model is also used to analyze climate consequences of biocarbon fuel polices and of the shale revolution

abolishing biofuel policies possible impacts on agricultural price levels price variability and global food security abstract in this paper we assess the impact of abolishing biofuel policies mandates tax credits import and export tariffs on agricultural price levels and price variability as well as some aspects related to global food security for the analysis we employ a recursive dynamic agricultural multi commodity model within a stochastic framework results of the 10 years forward looking scenario indicate that the removal of biofuel policies would have a significant effect on price variability of biofuels but only a marginal impact on the variability of agricultural commodity prices without biofuel policies global biofuel demand would decrease by 25 for ethanol and 32 for biodiesel moreover prices would only moderately decrease for ethanol feedstock commodities like wheat and coarse grains while prices for biodiesel feedstock commodities specifically vegetable oils would be more affected due to competing uses of crop production such as feed and industrial use abolishing biofuel policies would not necessarily lead to an increase in global food security as food use increases would remain low for most crops and regions

global oil prices and local food prices evidence from east africa it is widely believed that oil prices impact food prices in developing countries yet rigorous evidence on this relationship is scarce using maize and petrol price data from east africa we show that global oil prices do affect food prices but primarily through transport costs rather than through biofuel or production cost channels we find that global oil prices transmit much more rapidly to the pump and then to local maize prices than do global maize prices suggesting that the immediate effects of correlated commodity price shocks on local food prices are driven more by transport costs than by the prices of the grains themselves furthermore we present suggestive evidence that for markets furthest inland changes in world oil prices have larger effects on local maize prices than do changes in world maize prices

gendered impacts of the 2007 2008 food price crisis evidence using panel data from rural ethiopia abstract this paper provides empirical evidence on the gendered impact of the 2007 2008 food price crisis using panel data on 1400 households from rural ethiopia that were initially surveyed before the onset of the crisis in 1994 1995 1997 and 2004 and after food prices spiked in 2009 it investigates whether female headed households are more likely to report experiencing a food price shock and whether female headed households experiencing a shock are more or less likely to adopt certain coping strategies controlling for individual household and community characteristics our findings suggest that female headed households are more vulnerable to food price changes and are more likely to have experienced a food price shock in 2007 2008 because female headed households are also resource poor and have a larger food gap compared with male headed households they cope by cutting back on the number of meals they provide their households during good months and eating less preferred foods in general a combination of short term measures to protect diet diversity and micronutrient consumption of vulnerable groups and longer term measures to promote investment in sustainable agriculture such as strengthening women s property rights may increase the ability of poor and vulnerable households to cope better with food price increases

volatility linkages between energy and agricultural commodity prices abstract we investigate price and volatility risk originating in linkages between energy and agricultural commodity prices in germany and study their dynamics over time we propose an econometric approach to quantify the volatility and correlation risk structure which has a large impact for investment and hedging strategies of market participants as well as for policy makers volatilities and their short and long run linkages are analyzed using an asymmetric dynamic conditional correlation garch model as well as a multivariate multiplicative volatility model our approach provides a flexible and accurate fitting procedure for volatility and correlation risk we find that in the long run prices move together and preserve an equilibrium while correlations are mostly positive with persistent market shocks our results reveal that concerns about biodiesel being the cause of high and volatile agricultural commodity prices are rather unjustified

higher fuel and food prices impacts and responses for mozambique rising world prices for fuel and food represent a negative terms of trade shock for mozambique the impacts of these price rises are analyzed using various approaches detailed price data show that the world price increases are being transmitted to domestic prices short run net benefit ratio analysis indicates that urban households and households in the southern region are more vulnerable to food price increases rural households particularly in the north and center often benefit from being in a net seller position longer term analysis using a computable general equilibrium cge model of mozambique indicates that the fuel price shock dominates rising food prices from both macroeconomic and poverty perspectives again negative impacts are larger in urban areas the importance of agricultural production response in general and export response in particular is highlighted policy analysis reveals difficult trade offs between short run mitigation and long run growth improved agricultural productivity has powerful positive impacts but remains difficult to achieve and may not address the immediate impacts of higher prices

explaining the african food riots of 2007 2008 an empirical analysis abstract a sharp escalation in worldwide commodity prices precipitated the global food crisis of 2007 2008 affecting the majority of the world s poor causing protests in developing countries and presenting policymakers with the challenge of simultaneously addressing hunger poverty and political instability these food price shocks fomented violent civil responses in some countries but not others offering a unique opportunity to assess the factors that contributed to these disturbances we explore this question empirically with specific reference to africa where food riots occurred in at least 14 countries by examining the socio economic and political conditions facing african countries we attempt to answer why only some countries in africa witnessed food riots in late 2007 and early 2008 while others did not our empirical analysis demonstrates that higher levels of poverty as proxied by the human poverty index restricted access to and availability of food urbanization a coastal location more oppressive regimes and stronger civil societies are associated with a higher likelihood of riots occurring we also examine three country cases egypt mozambique niger which represent different circumstances and responses to the food crisis and identify specific factors that were associated with food protests in each case our study highlights the importance of pro poor policies and investments and improved governance in addressing the problems facing the poor and in helping secure political stability as the frequency and variability of natural disasters increase in response to climate change such policies can serve to protect the poor from the debilitating consequences of the resulting shocks

biofuel related price transmission literature a review abstract in this article an extensive review of the rapidly growing biofuel related time series literature is carried out the data used the modeling techniques and the main findings of this literature are discussed providing a review of this flourishing research area is relevant as a guidepost for future research this literature concludes that energy prices drive long run agricultural price levels and that instability in energy markets is transferred to food markets

in search of attention in agricultural commodity markets abstract this paper investigates the impact of attention driven behaviour on agricultural commodity prices we proxy attention driven behaviour using search queries for the commodity names in google we apply the ardl model to estimate the impact of search queries on three internationally traded agricultural commodities corn wheat and soybean using weakly data for the period 2009 2015 the results show that there is causal and permanent relationship between google search queries and prices of corn and wheat confirming the presence of the attention driven behaviour however the estimates do not confirm this relationship for soybean price

food prices and poverty do higher food prices help or hinder poverty reduction despite much debate existing research has almost solely relied on simulation models to address this question in this paper world bank poverty estimates are used to systematically test the relationship between changes in poverty and exogenous changes in real domestic food prices the paper uncovers indicative evidence that increases in food prices are associated with reductions in poverty not increases a likely empirical explanation is the relatively strong agricultural supply and wage responses to food price increases and the fact that the majority of the world s poor still heavily rely on agriculture or agriculture related activities to earn a living

impact of increasing liquid biofuel usage on eu and uk agriculture the biofuels industry in both the uk and the eu as a whole has expanded significantly in recent years in response to various eu biofuel policy initiatives further expansion of biofuel demand will increase the impact of the biofuels sector on agricultural markets this paper examines the impact that increasing levels of first generation biofuel demand to 10 of total transport fuel use in the uk and other eu member states would have on agricultural markets within the eu and specifically the uk using a partial equilibrium modelling system increasing overall biodiesel demand raises demand for vegetable oil and oilseed and in turn their prices the increased grain demand in response to the increased bioethanol demand is mostly sourced from changes in eu net trade

a sketch of the economics of the greenhouse effect over the last decade scientists have studied extensively the greenhouse effect which holds that the accumulation of carbon dioxide co2 and other greenhouse gases ghgs is expected to produce global warming and other significant climatic changes over the next century see stephen schneider 1989 the present study presents an economic approach for analyzing policies to slow climate change

global biofuels key to the puzzle of grain market behavior these jumps in the prices of these three major grains have also revealed the these jumps in the prices of these three major grains have also revealed the chaotic state of economic analysis of agricultural commodity markets economists chaotic state of economic analysis of agricultural commodity markets economists and scientists have engaged in a blame game apportioning percentages of responand scientists have engaged in a blame game apportioning percentages of responsibility for price spikes to bewildering lists of factors which include a surge in meat sibility for price spikes to bewildering lists of factors which include a surge in meat consumption caused by unprecedented increases of income of the vast populations consumption caused by unprecedented increases of income of the vast populations of china and india idiosyncratic regional droughts and fi res speculative bubbles a of china and india idiosyncratic regional droughts and fi res speculative bubbles a new fi nancialization of grain markets the slowdown of global agricultural research new fi nancialization of grain markets the slowdown of global agricultural research spending jumps in costs of energy and fertilizers shifts in interest rates the decline spending jumps in costs of energy and fertilizers shifts in interest rates the decline of the dollar the surge in biofuels demands bans on genetically modifi ed plants of the dollar the surge in biofuels demands bans on genetically modifi ed plants and climate change several observers have claimed to identify a perfect storm in and climate change several observers have claimed to identify a perfect storm in the grain markets in 2007 2008 a confl uence of some of the factors listed above the grain markets in 2007 2008 a confl uence of some of the factors listed above the continuing confused state of the economics of grain price volatility may the continuing confused state of the economics of grain price volatility may seem odd after all grain markets have many of the features of textbook competiseem odd after all grain markets have many of the features of textbook competitive models the products are relatively uniform their primary producers and tive models the products are relatively uniform their primary producers and ultimate consumers are atomistic price takers prices and outputs in the united ultimate consumers are atomistic price takers prices and outputs in the united states and other developed countries are unusually well measured by the standards states and other developed countries are unusually well measured by the standards of most goods and services in the world economy with data freely available from of most goods and services in the world economy with data freely available from

toward a green revolution in africa what would it achieve and what would it require the current global food crisis has reemphasized the costliness of africa s failure to achieve food security and poverty reduction the instrument by which other more successful developing countries achieved these outcomes was a green revolution in agriculture while previous research has provided largely discursive appraisals of the viability of an african green revolution this article adopts a more rigorous methodology to address that question first an economy wide multimarket model augmented with existing poverty growth elasticities is developed to assess the likely impacts of a rapid acceleration in food production of the kind witnessed in previous green revolutions on food prices consumption and demand farmer revenue and poverty our results suggest that a rapid growth in staple production together with more integrated regional markets would reduce food prices by roughly 20 40 for consumers and 10 20 for producers among the major crops this translates into a large rise in farm revenues annual agricultural growth rates of 6 5 or higher broader income growth and food security and over 70 million africans being lifted out of poverty the article concludes by emphasizing the kinds of fundamental policy actions and resources that would be required for achieving these outcomes

anatomy of a crisis the causes and consequences of surging food prices although the potential causes and consequences of recent rising international food prices have attracted widespread attention many existing appraisals are superficial and or piecemeal this article attempts to provide a more comprehensive review of these issues based on the best and most recent research as well as on fresh theoretical and empirical analysis we first analyze the causes of the current crisis by considering how well standard explanations hold up against relevant economic theory and important stylized facts some explanations turn out to hold up much better than others especially rising oil prices the depreciation of the u s dollar biofuels demand and some commodity specific explanations we then provide an appraisal of the likely macro and microeconomic impacts of the crisis on developing countries we observe a large gap between macro and micro factors which when identifying the most vulnerable countries often point in different directions we conclude with a brief discussion of what ought to be learned from this crisis

extent and possible causes of intrayear agricultural commodity price volatility wheat corn rice soybeans and cotton experienced higher volatility in the second half of the 2000s for the sample at hand the unit root tests only validate a new period of high volatility for wheat and cotton if in the next couple of years however corn rice and soybeans maintain their higher volatility a new period of high volatility may also be validated statistically regarding the factors driving the intrayear volatility gmm estimates show that commodity market fundamentals i e the stock to use ratio and to a lesser extent the degree of internationalization are the most systematically statistically significant coefficients among commodities over time consecutive low stock to use ratios and a thin international market provoke typically high volatility speculative activity and liquidity in the agricultural derivative market have a stabilizing effect on the spot price if any finally common macro factors significantly impact volatility especially the volatility of petrol and of exchange rates their dispersion importance over the sample is quite sizeable however it is difficult to establish a link between on the one hand loose monetary policy business cycle and inflation and on the other hand commodity price volatility as the sign of the estimated coefficient changes depending on the commodity and the estimated elasticities are quite low

can export restrictions be disciplined through the world trade organisation a number of major agricultural exporting countries responded to high food prices from 2007 to 2011 by imposing export restrictions on agricultural commodities in efforts to constrain domestic food price inflation these restrictions reduced the volume of internationally traded food and exacerbated international price spikes net food importing countries were faced with growing import bills and non governmental organisations that target food security scaled back programme commitments and appealed for increased funding there have subsequently been a chorus of calls for the development of a formal international framework that could discipline the use of agricultural export restrictions the agreements of the world trade organisation wto have been targeted as possible fora for such disciplines we present a framework in which the efficacy of such disciplines can be analysed and conclude that constraints on agricultural export restrictions are not likely to be effective within the wto s dispute settlement understanding for two reasons first the timelines for dispute settlement in the wto are too long to be useful in disputes about export restrictions during periods of high food prices second the withdrawal of tariff concessions or trade retaliation that could be authorised in such cases would not be a credible response for many complainant countries

food versus fuel what do prices tell us abstract sorting out the impacts of biofuels on global agricultural commodity prices is impossible without turning to data and distinguishing between the short run versus the long run impacts using time series prices on fuels and agricultural commodities the aim is to investigate the long run cointegration of these prices simultaneously with their multivariate short run interactions results indicate no direct long run price relations between fuel and agricultural commodity prices and limited if any direct short run relationships in terms of short run price movements sugar prices are influencing all the other agricultural commodity prices except rice with sugar the number one world input for ethanol results indicate increased ethanol production is potentially influencing short run agricultural commodity prices overall results support the effect of agricultural commodity prices as market signals which restore commodity markets to their equilibria after a demand or supply event shock

the impact of rising ethanol production on the brazilian market for basic food commodities an econometric assessment the controversial debate on the impacts of rising biofuel production on food commodity markets is of great policy relevance in brazil this paper contributes to the discussion by applying panel data regression models with fixed effects using ols our dataset comprises annual production harvested area data for sugar ethanol and five other staple commodities ranging from 1981 to 2009 for 24 brazilian states our results indicate that rising ethanol production exerts statistically significant positive impacts on sugarcane negative impacts on rice beans and soybeans acreage but no statistically significant effect on the areas for corn and manioc the negative impacts on commodities acreage have implications for the associated prices ceteris paribus rising ethanol production puts some upward pressure on the prices for rice beans and soybeans however the economic implication of these direct land use effects is attenuated due to the moderate scale of any effect

modelling production cost scenarios for biofuels and fossil fuels in europe competitive production costs compared to conventional fuels are imperative for biofuels to gain market shares as current tax advantages for biofuels are only temporary comparing production costs of different biofuels with fossil fuels is a challenge due to the complexity of influencing factors the objective of this research paper is threefold 1 to project future bio fuel feedstock prices based on the crude oil price development the price index for agricultural products growth in world population growth in wealth per capita income and change in energy consumption per capita 2 to simulate production costs under consideration of likely economies of scale from scaling up production size and technological learning and 3 to compare different biofuels and fossil fuels by scenario analysis a calculation model for biofuel production is used to analyse projected production costs for different types of biofuels in europe for 2015 and 2020 unlike engineering oriented bottom up approaches that are often used in other biofuel studies the macro economic top down approach applied in this study enables an economic comparison and discussion of various fuel types based on reference scenarios of crude oil prices of 50 100 150 and 200 per barrel depending on the specific raw material prices as well as the conversion costs the analysis delivered a differentiated view on the production costs and thus on the competitiveness of each individual type of fuel the results show that 2nd generation biofuels are most likely to achieve competitive production costs mid to long term when taking into account the effects from technological learning and production scale size as well as crude oil price scenarios between 50 and 200 per barrel for both reference years in all crude oil price scenarios bioethanol from lignocellulosic raw materials as well as biodiesel from waste oil are associated with high cost saving potentials which enable them to outperform fossil fuels and 1st generation biofuels

co movements in commodity prices a note based on network analysis this article analyses co movements in a wide group of commodity prices during the time period 1992 2010 our methodological approach is based on the correlation matrix and the networks inside through this approach we are able to summarize global interaction and interdependence capturing the existing heterogeneity in the degrees of synchronization between commodity prices our results produce two main findings a we do not observe a persistent increase in the degree of co movement of the commodity prices in our time sample however from mid 2008 to the end of 2009 co movements almost doubled when compared with the average correlation b we observe three groups of commodities which have exhibited similar price dynamics metals oil and grains and oilseeds and which have increased their degree of co movement during the sampled period

rational destabilizing speculation positive feedback trading and the oil bubble of 2008 abstract this article examines how the interaction of different participants in the crude oil futures markets affects the crude oil price efficiency normally the commercial market participants such as oil producers and oil consumers act as arbitrageurs and ensure that the price of crude oil remains within the fundamental value range however institutional investors that invest in crude oil to diversify their portfolios and or hedge inflation can destabilize the interaction among commercial participants and liquidity providing speculators we argue that institutional investors can impose limits to arbitrage particularly during the financial crisis when the investment demand for commodities is particularly strong in support we show that commercials hedgers had significantly reduced their short positions leading to the 2008 oil bubble they were potentially aggressively offsetting their short hedges as a result by essentially engaging in a positive feedback trading commercial hedgers at least contributed to the 2008 oil bubble these findings have been mainly overlooked by the existing research

a quantile autoregression analysis of price volatility in agricultural markets this paper investigates the dynamics of agricultural price volatility based on a quantile autoregression qar model the qar model provides a flexible representation of the distribution of price and its dynamics the approach is applied to u s wheat and corn markets over the period of 1980 2017 this period is of significant interest as it covers important changes in agricultural policy and increased reliance on markets the price analysis is conducted conditional on stocks held in the previous period we show how increasing previous stocks shift the price distribution to the left and decreases the odds of facing price spikes by shifting down the upper tail of the price distribution our analysis also examines the effects of changing public stocks on prices for both wheat and corn this reflects changing agricultural policy contrasting the 1980s when public stocks were relatively high with the post 2005 period when public stocks became zero we document how higher public stock ratio during the previous period did not lower the odds of facing price spikes applied to the wheat and corn markets we also uncover evidence of local dynamic instability in the upper tail of the price distribution suggesting that price instability becomes more pronounced when previous stocks are low

farm level pathways to improved nutritional status global national and local policies and programs for agricultural development arerecurrently justified based on their alleged role in improving food and nutrition security however strikingly little evidence is available to prove that a direct household level linkbetween agricultural production and improved nutrition exists the objective of thisspecial issue is to systematically and empirically test using data from africa and southasia whether a relationship between household agricultural production and nutrition canbe found overall the studies in this special issue support the hypothesis that householdagricultural production has direct and important linkages with dietary patterns andnutrition

self reported food insecurity in africa during the food price crisis this article analyzes data on self reported food insecurity of more than 50 000 individuals in 18 sub saharan african countries over the period 2005 2008 when global food prices increased dramatically the average level of self reported food insecurity was high but remarkably stable over time at about 54 however this average hides large heterogeneity both within countries and across countries in eight of the sample countries self reported food security improved while it worsened in the ten other countries our results suggest that heterogeneous effects in self reported food security are consistent with economic predictions as they are correlated with economic growth and net food consumption both at the household and country level specifically in the face of rising food prices self reported food security improved on average in rural households while it worsened in urban households a finding that holds when using global prices or domestic food prices improvements in food security over time were also positively correlated with net food exports and gdp per capita growth while the self reported indicator used in this paper requires further study and one should carefully interpret the results our findings suggest the need for a critical evaluation of the currently used data and numbers in the public debate on food prices and food insecurity

farm acreage shocks and crop prices an svar approach to understanding the impacts of biofuels the last 10 years have seen tremendous expansion in biofuels production particularly in corn ethanol in the united states at the same time that commodity prices e g corn have experienced significant spikes while supporters claim that biofuels are renewable and carbon friendly concerns have been raised about their impacts on land use and food prices this paper analyzes how us crop prices have responded to shocks in acreage supply these shocks can be thought of as a shock to the residual supply of corn for food using a structural vector auto regression framework we examine shocks to a crop s own acreage and to total cropland this allows us to estimate the effect of dedicating cropland or non crop farmlands to biofuels feedstock production a negative shock in own acreage leads to an increase in price for soybeans and corn our calculations show that increased corn ethanol production during the boom production year 2006 2007 explains approximately 27 of the experienced corn price rise

fit for purpose rethinking food security responses in protracted humanitarian crises the recent rise in the price of food worldwide defied easy categorization however the impact of the price hikes on developing country consumption served to refocus attention on food security much attention was paid to short term buffering of nutrition in tandem with new investments in agriculture a dual approach that served to reinforce a longstanding bifurcation in analysis and programming between emergency and development categories suggesting that emergency responses deal with immediate needs while development means addressing underlying causes with a longer term lens the notion of the relief to development continuum has long been dismissed as conceptual framework but has never really been replaced as a programmatic framework this paper suggests a multi dimensional way of conceiving of these categories and a more systematic way of thinking about response ethiopia is noted as an example where elements of this new approach are taking shape but even ethiopia has not adopted all of these components in an integrated way and the programming there has not been comprehensively evaluated

are smallholder farmers better or worse off from an increase in the international price of cereals citation nakelse t dalton t j hendricks n p hodjo m 2018 are smallholder farmers better or worse off from an increase in the international price of cereals food policy 79 213 223 https doi org 10 1016 j foodpol 2018 07 006

local impacts of a global crisis food price transmission consumer welfare and poverty in ghana abstract this paper takes a local perspective on global food price shocks by analyzing food price transmission between regional markets in ghana it also assesses the impacts of food price increases on various household groups taking the 2007 2008 global food crisis as an example we show that prices for domestic grain products are highly correlated with world market prices this is true both for products for which ghana is highly import dependent e g rice and the products for which ghana is self sufficient e g maize the econometric results also show that price transmission is high between regional producer markets and markets located in the country s largest cities and the distance between producer and consumer markets and the size of consumer markets matter in explaining the price transmission the welfare analysis for households as consumers shows that the effect of world food prices appears relatively modest for the country as a whole due to relatively diverse consumption patterns within country however the national average hides important regional differences both between regions and within different income groups we find that the poorest of the poor particularly those living in the urban areas are hardest hit by high food prices the negative effect of the food crisis is particularly strong in northern ghana the main explanations for this regional variation in the price effect is the different consumption patterns and much lower per capita income levels in the north of ghana compared to other regions in the country

rice prices and income distribution in thailand a non parametric analysis rice is a staple crop in thailand significantly entering both household production and consumption this paper examines the effect of rice prices on the distribution of real income across households taking into account household characteristics and geographical location the data set is a large scale survey of 11 893 households simple nonparametric techniques for regression and density estimation are used these methods depend on few assumptions and generate flexible graphical results that are directly informative about the problem at hand the main results are that higher rice prices should benefit all rural households but the largest benefits accrue to rural households in the middle of the income distribution copyright 1989 by royal economic society

modelling price transmission and volatility spillover in the slovenian wheat market abstractinterdependence between first and second moments of producer and consumer wheat prices in slovenia is assessed in light of the recent major historical events that the country has undergone as well as the recent rumours of cartel agreements between millers causing a decline in farm gate prices while leaving consumer prices untouched a threshold vector error correction and multivariate generalized autoregressive conditional heteroscedasticity model with exogenous variables is applied results indicate that price level adjustments mainly favour retailers by increasing their marketing margins important second moment interactions are also identified increases in international wheat stocks reduce producer prices while higher interest rates increase their instability

the effects of china s growth on the food prices and the food exports of other developing countries this article explores the impacts of china s growth in the international markets of agricultural products along two dimensions food price inflation and export growth in other developing countries china s food imports of vegetable oils have grown dramatically over the last decade linking china s economic growth to the recent increases in global food prices if china is a source of global food price inflation exporting countries will benefit whether they sell directly to china or not these direct and indirect linkages are explored using a short run partial equilibrium model of international trade in agricultural products in which consumer prices and trade costs are derived from bilateral trade flows china s effects on food prices and exports are estimated by reducing chinese food expenditures in 2007 by half roughly china s level of expenditures in 1995 results indicate that food prices as measured by ces price indexes in developing asia africa and latin america would have been reduced by 1 27 0 32 and 0 22 respectively china has been an important source of growth for exporters selling directly to china there is no evidence of export growth due to an overall increase in food prices caused by china s growth

implications of higher global food prices for poverty in low income countries in many poor countries the recent increases in prices of staple foods raise the real incomes of those selling food many of whom are relatively poor while hurting net food consumers many of whom are also relatively poor the impacts on poverty will certainly be very diverse but the average impact on poverty depends upon the balance between these two effects and can only be determined by looking at real world data results using household data for ten observations on nine low income countries show that the short run impacts of higher staple food prices on poverty differ considerably by commodity and by country but that poverty increases are much more frequent and larger than poverty reductions the recent large increases in food prices appear likely to raise overall poverty in low income countries substantially

commodity prices and money lessons from international finance many commodity prices have been falling rapidly recently as of thursday 31 july 1984 the journal of commerce s index for raw industrial materials had declined 10 relative to march and 20 relative to its peak value in 1980 in the current lull between political conventions this counts as something of a hot topic in washington some supply siders like alan reynolds from jude wanniski s firm polyconomics are warning that the large decline in commodity prices is signalling a general deflation throughout the economy and the possibility of widespread defaults reminiscent of the 1930s congressman jack kemp wants the federal reserve board to adopt a monetary policy rule that would automatically expand whenever commodity prices are low as now and automatically contract whenever commodity prices are high as in the late 1970s there has even been talk about embodying such a monetary rule as a plank in the republican party platform in dallas this month seldom before have steel scrap cotton and hides seemed so glamorous my topic today is the determination of the prices of basic commodities everything from agricultural commodities to the gold and other metals so precious to the supply siders

food price increases and net food importing countries lessons from the recent past recent increases in food and other commodity prices have highlighted concerns that many poor countries are net food importers and higher food prices would worsen their trade balances in this article we analyze the changes in food trade balances associated with the 32 increase in food prices from 2000 2001 to 2004 2005 we find a small deterioration in food trade balances of low income countries and an improvement in middle income countries the deterioration is most severe for countries in conflict and small island states so attention should be placed first on these countries and on a few very low income countries that are also vulnerable because low income countries as a group had much lower agricultural gdp growth rates than middle income countries the answers to food vulnerability in low income countries should probably be addressed within the context of incentives for agricultural production

the impact of exchange rates and developing country debt on commodity prices a major feature of the international economy over the past decade has been the swings in the value of the us dollar the dollar fell to a historically low level in the late i970s but rose sharply over the period i982 4 by the beginning of i985 the dollar was generally considered to be over valued by between 2o and 40 since i985 there has been a depreciation of over one third these wide fluctuations in the value of the dollar have had implications for all major traded goods this paper focuses on the effects of changes in the value of the dollar on primary commodity prices and possible interactions between ldc indebtedness and these effects a rise fall in the value of the dollar must be expected to result in a fall rise in dollar commodity prices ridler and yandle i972 proposed a simple comparative static single commodity model to analyse the effects of exchange rate changes on the price of an individual primary commodity they showed that the commodity price change would be given by the change in an appropriately weighted exchange rate index write the price of commodityj as

risks and spatial connectivity evidence from food price crisis in rural indonesia abstract this paper examines the impact of the agricultural commodity price surge globally experienced in 2007 2008 and thereafter on income growth of agricultural producers and non producers using recent panel data from indonesia first during this period producers experienced significantly higher earnings and total income growth than non producers narrowing their income gap second the negative effect on non producers real incomes was smaller in spatially well connected areas where to mitigate the impact private transfers such as remittances as well as employment incomes increased among non producers in contrast government programs did not effectively cushion the income shock therefore informal insurance was more effective than formal government funded social protection programs to mitigate the crisis shock