sequential labor decisions under uncertainty an estimable household model of west african farmers this paper reports estimates of the structural parameters of a stochastic control model that describcs the labor decisions of small farmers in burkina faso west africa the focus of the estimation is on measuring flexibility in production and intertemporal substitutability in consumption full information maximum likelihood estimates of the primitive parameters of the model are computed even though optimal labor decision rules cannot be derived analytically vuong s non nested model specification test shows that this method yields parameter estimates that are superior to those derived by assuming that farmers solve a deterministic control problem the low levels of agricultural labor effort commonly observed in the survey area are shown to be a consequence both of the low productivity of labor in archaic rainfed agriculture and of farmers awareness that in the absence of a labor market overly ambitious production plans lead to seasonal manpower constraints to meet rainfed farmers concerns agricultural research institutes and extension services should factor flexibility into their research agendas

food versus fuel an updated and expanded evidence abstract this paper replicates the study of zhang et al 2010 food versus fuel what do prices tell us energy policy 38 pp 445 451 we confirm the findings of the original paper that there was only a weak relationship between ethanol and food commodities in the period between march 1989 and july 2008 in addition we extend that study and examine the cointegration relationship between biofuels and related commodities for a considerably enlarged dataset 3 vs 1 market 26 vs 8 commodities analysis up till 2017 vs 2008 weekly vs monthly data frequency focusing on the biofuel markets of brazil the eu and the usa in the three separate periods before during and after the food crisis of 2007 and 2008 we show that studying the time variation of the relationships plays an essential role in their proper understanding our results help to clarify the wide extensive discussion about the role of biofuels prices in food shortages manifested particularly during the food crises in agreement with the original study we confirm that price series data do not support strong statements about biofuels uniformly serving as main leading source of high food prices and consequently the food shortages

time series econometric analyses of biofuel related price volatility time series econometrics studies have analyzed volatility interactions between biofuel and food and fossil fuel markets we review data modeling techniques and the main findings in the literature and present our latest contributions we identify areas for further research

crude oil corn ethanol nexus a contextual approach this paper offers a holistic study on the complex relationships between crude oil corn and ethanol during a turbulent period between 2006 and end of 2011 through a holistic mapping of the current market situation and a contextual analytical design we show that there exists a strong relationship between crude oil and corn markets on one side and crude oil and ethanol on the other however the price relationship between corn and ethanol was revealed to be less straightforward and is driven by the us government fuel policy furthermore the study indicates that corn markets have became more prone to volatility due to ethanol production especially when the demand for corn is high and or the crude oil prices are high enough to create a competitive market for ethanol

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

agricultural household models extensions applications and policy this book presents the basic model of an agricultural household that underlies most of the case studies undertaken so far the model assumes that households are price takers and is therefore recursive the decisions modeled include those affecting production and the demand for inputs and those affecting consumption and the supply of labor comparative results on selected elasticities are presented for a number of economies the empirical significance of the approach is demonstrated in a comparison of models that treat production and consumption decisions separately and those in which the decisionmaking process is recursive the book summarizes the implications of agricultural pricing policy for the welfare of farm households marketed surplus the demand for nonagricultural goods and services the rural labor market budget revenues and foreign exchange earnings in addition it is shown that the basic model can be extended in order to explore the effects of government policy on crop composition nutritional status health saving and investment and to provide a more comprehensive analysis of the effects on budget revenues and foreign exchange earnings methodological topics primarily the data requirements of the basic model and its extensions along with aggregation market interaction uncertainty and market imperfections are discussed the most important methodological issues the question of the recursive property of these models is also discussed

dutch disease effect of oil rents on agriculture value added in middle east and north african mena countries abstract this paper investigates the effect of oil rents on agriculture value added in oil producing middle east and north african mena countries annual data from 1970 to 2011 panel cointegration tests by pedroni 1999 long ran panel causality tests by canning and pedroni 2008 and two step system gmm by blundell and bond 1998 are used in this study we find a negative relationship between oil rents and agriculture value added in the long run with a rather slow rate of short run adjustment of agriculture value added back to equilibrium after a boom in oil rents these results indicate that an oil sector boom is associated with a contraction in the agriculture sectors of the countries in the panel in the long run this is probably attributable to a resource movement effect from other economic sectors to the booming oil sector in these countries this serves as evidence of a dutch disease effect of an oil sector boom on agriculture in the mena countries in this study

high frequency volatility connectedness between the us crude oil market and china s agricultural commodity markets abstract this paper investigates the realised volatility connectedness of us crude oil futures and five china s agricultural commodity futures using connectedness measures and high frequency data time varying volatility connectedness characteristics are identified by combining a multivariate heteroscedastic autoregressive har model with the dcc garch model the results verify the existence of volatility spillover from the us crude oil market to china s agricultural commodity markets although the magnitude of this spillover is weak furthermore the realised volatility is decomposed into positive and negative components to identify the asymmetric effect of volatility connectedness the results show that market interdependence has obviously increased for negative volatility relative to positive volatility implying that volatility transmission has a leverage effect across markets

gender differentials in farm productivity implications for household efficiency and agricultural policy abstract within many african households agricultural production is simultaneously carried out on many plots controlled by different members of the household detailed plot level agronomic data from burkina faso provides striking evidence of substantial inefficiencies in the allocation of factors of production across the plots controlled by different members of the household production function estimates imply that the value of household output could be increased by 10 15 by reallocating currently used factors of production across plots this finding contradicts standard models of agricultural households a richer model of behaviour which recognizes that the individuals who comprise a household compete as well as co operate has important implications for the structure of agricultural production and for the design of agricultural policy

drought ethanol and livestock abstract the 2012 drought in the u s midwest resulted in volatile crop prices with field crops constituting a major input in livestock production livestock producers sought a waiver to renewable fuel standard biofuel mandates they believed such a waiver would mitigate crop price volatility given crops are major inputs in biofuel production the u s environmental protection agency epa denied the waiver under the belief that the waiver would have minimal if any impact on mitigating price volatility employing a vecm the objective is to investigate if it was prudent for the epa to reject the waiver results generally support epa s conclusion that the waiver relaxing the biofuel mandate would have minimal impact

haddad lawrence john hoddinott and harold alderman eds intrahousehold resource allocation in developing countries models methods and policy baltimore md johns hopkins university press 1997 384 pp 55 00 in this volume economists demographers sociologists and anthropologists collaborate in the study of how resources are allocated within households in developing countries and why it matters from a policy perspective surveying a broad range of theory and evidence the contributors examine the many social and cultural factors that influence decisions about the family and household level about the allocation of time income assets and other resources ths contributors show that a more complete understanding of intrahousehold behaviour can increase the likelihood that policies will reach the people they are intended to affect

co movements between crude oil and food prices a post commodity boom perspective using the correlations of var forecast errors at different horizons this paper analyzes the dynamics of co movements between crude oil and food prices for each food price considered a bivariate var model is estimated on two subsample periods a pre commodity boom 1990m1 2006m12 and a post boom period 2007m1 2015m5 our results reveal strong positive co movements between crude oil and food prices in the aftermath of the commodity boom while no statistically significant co movements are observed over the pre boom period hence our findings provide further empirical evidence on the actual linkages between the crude oil and agricultural markets

impact of food price volatility on the us restaurant sector although fluctuations in agricultural commodity prices appear to be a source of risk to the us restaurant sector the effect that volatility of food price has on the performance returns of that s

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

the impact of uncertainty shocks on the volatility of commodity prices in this paper we empirically examine the impact of uncertainty shocks on the volatility of commodity prices using several alternative measures of economic uncertainty for the u s we estimate their effects on commodity price volatility through var analysis we find that the latent uncertainty shocks have the most significant impact on commodity price volatility when compared to observable measures of economic uncertainty in specific our results show that the unobservable economic uncertainty measures of jurado et al 2015 have a significant and long lasting positive effect on the volatility of commodity prices our findings indicate that a positive shock in unobservable macroeconomic and financial uncertainty leads to a persistent increase in the volatility of the broad commodity market index and of individual commodity prices with the macroeconomic effect being more significant finally we show that the impact is stronger in energy commodities compared to agricultural and metals markets

dependence risk analysis in energy agricultural and precious metals commodities a pair vine copula approach we apply pair vine copulas specifically the c vine and r vine copulas to examine the conditional multivariate dependence pattern structure and r vine copula based value at risk var to assess fi

a cournot nash model of family decision making this paper models a two person family each family member is utility maximising yet family members are interdependent because of caring and public goods within the family the two family members interdependent utility maximisation problems are first solved using a non cooperative or cournot nash game theoretic framework the cournot nash equilibrium is then used as a threat point in a bargaining game the paper provides a rigorous derivation of the properties of household demands a full analysis of the determinants of intra household resource allocation including the effect of varying household bargaining power and consideration of policy implications

how does gender affect sustainable intensification of cereal production in the west african sahel evidence from burkina faso better understanding of gender differences in the adoption of agricultural intensification strategies is crucial for designing effective policies to close the gender gap while sustainably enhancing farm productivity we examine gender differences in adoption rates likelihood and determinants of adopting strategy sets that enhance yields protect crops and restore soils in the west african sahel based on analysis of cereal production in burkina faso applying a multivariate probit model to a nationally representative household panel we exploit the individual plot as unit of analysis and control for plot manager characteristics along with other covariates reflecting the socio cultural context of farming combined with the economic attributes of inputs we find that female managers of individual cereal fields are less likely than their male counterparts to adopt yield enhancing and soil restoring strategies although no differential is apparent for yield protecting strategies more broadly gender disaggregated regressions demonstrate that adoption determinants differ by gender plot manager characteristics including age marital status and access to credit or extension services do influence adoption decisions furthermore household resources influence the probability of adopting intensification strategy sets differently by gender of the plot manager variables expressing the availability of household labor strongly influence the adoption of soil restoring strategies by female plot managers by contrast household resources such as extent of livestock owned value of non farm income and area planted to cotton affect the adoption choices of male plot managers rectifying the male bias in extension services along with improving access to credit income and equipment to female plot managers could contribute to sustainable agricultural intensification

global oil prices macroeconomic fundamentals and china s commodity sector comovements abstract this paper investigates the common movements of commodity sectors in china as well as the economic underpinnings of the comovements we employ a bayesian dynamic latent factor model to disentangle the common and idiosyncratic sector specific factors of the prices of a group of china s commodity sectors petrochemicals grains energy non ferrous metals oils fats and softs the results indicate that the common factor accounts for a significant portion of the fluctuations of china s commodity sectors providing evidence of the strong commodity sector comovements in china we further use a var model to link the common movements across china s commodity sectors to the underlying determinants including global oil price shocks and domestic macroeconomic fluctuations we find that the global oil price shocks have strong effects on the common movements across commodity sectors in china in addition to its domestic macroeconomic fluctuations at long horizons however at short horizons the common movements across commodity sectors in china respond more strongly to the global oil shocks than to its domestic macroeconomic fluctuations

price policy poverty and power within rural west african households abstract this paper explores the impact of agricultural price policy on poverty in west africa a region in which prices are an important tool for raising rural household incomes a game theoretic collective model of household income generation and resource allocation is developed that incorporates three features typical of west african rural households preference heterogeneity among women and men individual resource control and power mediated bargaining over resource control in the face of changes in households economic environments to explore price effects the model is used to simulate the income impacts of large increases in cotton prices accompanying fast paced agricultural liberalisation in burkina faso in the 1980s the paper shows that where resources are controlled individually by household members rather than pooled pareto efficiency in income generation does not hold the impact of agricultural price policy on poverty is mediated by bargaining over resource control within households bo

energy consumption and economic growth evidence from the commonwealth of independent states abstract this study examines the relationship between energy consumption and economic growth for eleven countries of the commonwealth of independent states over the period 1991 2005 within a multivariate panel data framework based on pedroni 1999 pedroni 2004 heterogeneous panel cointegration test and corresponding error correction model cointegration is present between real gdp energy consumption real gross fixed capital formation and labor force with the respective coefficients positive and statistically significant the results of the error correction model reveal the presence of unidirectional causality from energy consumption to economic growth in the short run while bidirectional causality between energy consumption and economic growth in the long run thus the results lend support for the feedback hypothesis associated with the relationship between energy consumption and economic growth

causality and predictability in distribution the ethanol food price relation revisited abstract this paper examines the relationship between biofuels field crops and cattle prices in the u s from a new perspective we focus on predictability in distribution by asking whether ethanol returns can be used to forecast different parts of field crops and cattle returns distribution or vice versa density forecasts are constructed using conditional autoregressive expectile models estimated with asymmetric least squares forecast evaluation relies on quantile weighed scoring rules which identify regions of the distribution of interest to the analyst results show that both the centre and the left tail of the ethanol returns distribution can be predicted by using field crops returns on the contrary there is no evidence that ethanol can be used to forecast any region of the field crops or cattle returns distributions

do food and oil prices co move abstract this paper studies co movements between world oil prices and global prices for corn soybean and wheat using copulas several copula models with different conditional dependence structures and time varying dependence parameters were considered empirical results for weekly data from january 1998 to april 2011 showed weak oil food dependence and no extreme market dependence between oil and food prices these results support the neutrality of agricultural commodity markets to the effects of changes in oil prices and non contagion between the crude oil and agricultural markets however dependence increased significantly in the last three years of the sampling period even though upper tail dependence remained insignificant indicating that food price spikes are not caused by positive extreme oil price changes these results have implications for policy design risk management and hedging strategies

gender and trade within the household observations from rural guatemala abstract a household model proposed by carter and katz 1992 assumes that resource exchanges and the division of expenditure responsibilities among household members are directly observable and important to their individual and collective responses to new opportunities and constraints this paper illustrates that it is possible to observe the complex processes that characterize the domestic economy by examining several examples of intrahousehold resource transfers and expenditure flows among a sample of rural households in the central highlands of guatemala it is found that women transfer significant labor time to a new male income generating activity with the greatest single source of variation in the value of this intrahousehold resource transfer being the availability of older daughters to perform the domestic labor that is normally the responsibility of the female head it is also shown that the transfer of female land to her husband is in some cases compensated for or reciprocated by the transfer of tradeable goods at the end of the agricultural season with regard to women s remunerated labor activities older daughters enable their mothers to pursue these either by relieving them of some of their domestic responsibilities and or by directly contributing their labor to their mother s income generating endeavors nonfood expenditures are analyzed in light of the relative responsibilities of men and women in decision making finance and purchase it is found that increased male agricultural income is largely spent on male goods affecting women s ability to purchase food and domestic technology the paper concludes by arguing that the results obtained from direct observation of intrahousehold transfers are useful for the prediction and interpretation of microlevel policy impacts not obtainable from aggregate household information

dynamic jumps in global oil price and its impacts on china s bulk commodities abstract this paper investigated the impacts of oil price shocks especially dynamic jumps in its returns on china s bulk commodity markets at both the aggregate and industry levels after setting a zero lower bound to the jump intensity of the arji model we found that dynamic jumps exist in oil price movements moreover under shocks of oil price jumps not only the returns but also the risks of china s bulk commodity markets are affected significantly and the reactions of risks are characterized by overreactions meanwhile by decomposing oil price shocks into expected positive negative and unexpected positive negative components we discovered that the impacts of unexpected shocks are positive and significantly asymmetric at both levels while those of the expected shocks are negative and insignificantly asymmetric at the industry level in addition the volatility clustering of all price movements and the permanent volatility effects on china s bulk commodities are also authenticated by applying the garch family models

world oil prices precious metal prices and macroeconomy in turkey we examine the long and short run transmissions of information between the world oil price turkish interest rate turkish lira us dollar exchange rate and domestic spot gold and silver price we find that the world oil price has no predictive power of the precious metal prices the interest rate or the exchange rate market in turkey the results also show that the turkish spot precious metals exchange rate and bond markets do not also provide information that would help improve the forecasts of world oil prices in the long run the findings suggest that domestic gold is also considered a safe haven in turkey during devaluation of the turkish lira as it is globally it is interesting to note that there does not seem to be any significant influence of developments in the world oil markets on turkish markets in the short run either however transitory positive initial impacts of innovations in oil prices on gold and silver markets are observed the short run price transmissions between the world oil market and the turkish precious metal markets have implications for policy makers in emerging markets and both local and global investors in the precious metals market and the oil market

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

how is volatility in commodity markets linked to oil price shocks abstract this study investigates the effects of oil price shocks on volatility of agricultural and metal commodities we decompose an oil price shock to its underlying components including macroeconomics and oil specific shocks the applied method is the structural vector autoregressive svar model and the time span is from april 1983 to may 2014 the investigation is divided into two subsamples before and after may 2006 for agriculture taking into account the 2006 2008 food crisis and change in u s ethanol production policy and before and after january 2008 for metals considering the recent global financial crisis we find that based on impulse response functions the response of volatility of each commodity to an oil price shock differs significantly depending on the underlying cause of the shock for the both periods moreover according to variance decomposition the explanatory power of oil shocks becomes stronger after the crisis the different responses of commodities are described in detail by investigating market characteristics in each period

gender agricultural production and the theory of the household virtually all models of the household assume that the allocation of resources is pareto efficient within many african households agricultural production occurs on many plots controlled by different members of the household pareto efficiency implies that factors should be allocated efficiently across these plots i find in contrast that plots controlled by women are farmed much less intensively than similar plots within the household controlled by men the estimates imply that about 6 percent of output is lost because of inefficient factor allocation within the household the paper suggests a new approach to modeling intrahousehold allocation consistent with the empirical results

impact of energy prices and cellulosic biomass supply on agriculture energy and the environment an integrated modeling approach abstract the accelerated growth in biofuel markets has both created and reinforced linkages between agriculture and energy the evolution of biofuel markets over the next 10 20 years and the implications for energy agriculture and the environment are uncertain building on an integrated agriculture energy modeling framework this study analyzes a baseline and three alternative scenarios two scenarios based on energy prices crude oil and natural gas and one based on assumptions regarding cellulosic biomass availability by examining the impact of scenarios driven by a changes in the energy sector and b changes in the agricultural sector we can compare the differential effects on biofuels markets commodity prices and quantities in each sector and co 2 emissions scenario comparisons show biofuel markets affected more by crude oil prices than natural gas prices however higher natural gas prices shift the biofuel production mix away from corn grain based to more cellulosic ethanol via multiple mechanisms alternatively the scenario with no cellulosic feedstock lowers total ethanol production and raises ethanol and corn prices in terms of environmental impacts higher ethanol levels driven by higher oil prices lead to lower co 2 emissions in comparison the no cellulosic scenario results in the highest co 2 trajectory relative to the baseline

oil price agricultural commodity prices and the dollar a panel cointegration and causality analysis abstract this study examines the dynamic relationship between world oil prices and twenty four world agricultural commodity prices accounting for changes in the relative strength of us dollar in a panel setting we employ panel cointegration and granger causality methods for a panel of twenty four agricultural products based on monthly prices ranging from january 1980 to february 2010 the empirical results provide strong evidence on the impact of world oil price changes on agricultural commodity prices contrary to the findings of many studies in the literature that report neutrality of agricultural prices to oil price changes we find strong support for the role of world oil prices on prices of several agricultural commodities the positive impact of a weak dollar on agricultural prices is also confirmed

why firms engage in corruption a top management perspective this study builds upon the top management literature to predict and test antecedents to firms engagement in corruption building on a survey of 341 executives in india we find that if executives have social ties with government officials their firms are more likely to engage in corruption further these executives are likely to rationalize engaging in corruption as a necessity for being competitive the results collectively illustrate the role that executives social ties and perceptions have in shaping illegal actions of their respective firms

commodity dynamics a sparse multi class approach abstract the correct understanding of commodity price dynamics can bring relevant improvements in terms of policy formulation both for developing and developed countries agricultural metal and energy commodity prices might depend on each other although we expect few important effects among the total number of possible ones some price effects among different commodities might still be substantial moreover the increasing integration of the world economy suggests that these effects should be comparable for different markets this paper introduces a sparse estimator of the multi class vector autoregressive model to detect common price effects between a large number of commodities for different markets or investment portfolios in a first application we consider agricultural metal and energy commodities for three different markets we show a large prevalence of effects involving metal commodities in the chinese and indian markets and the existence of asymmetric price effects in a second application we analyze commodity prices for five different investment portfolios and highlight the existence of important effects from energy to agricultural commodities the relevance of biofuels is hereby confirmed overall we find stronger similarities in commodity price effects among portfolios than among markets

the empirical content of nash bargained household behavior in households whose allocation decisions can be represented as nash bargained household decisions extrahousehold environmental parameters eeps serve as pure shifters of the threat points the comparative statics of changes in demands due to changes in these eeps are given these are incorporated into a comprehensive statement of the empirical content of nash bargained household behavior including a nash generalization of barten s 1966 fundamental matrix equation of the theory of consumer demand estimation and data requirements are discussed along with nested testing of the following structure the neoclassical model is nested in the nash bargained model which in turn is nested in an unrestricted model of household demands emphasized throughout is the enriched menu of explanatory variables for demand analysis provided by the nash model as well as the model s ability to jointly analyze i household formation and ii intrahousehold allocation decisions

the mobilization of women s labor for cash crop production a game theoretic approach in the last decade or so economists have modeled phenomena such as household labor supply fertility behavior and child survival rates using the household as the unit of analysis this paper presents data that call into question the assumption that the household is a joint decision making unit which maximizes a neoclassical household utility function the data come from a study of the mobilization of women s labor by their husbands for irrigated rice production in north cameroon the first section of this paper describes briefly the massa rice and sorghum farming system and then considers the relationship between the amount of compensation women receive from their husbands for their labor on rice production and the amount of labor they allocate to rice production the findings suggest that a bargaining model may describe the intrahousehold relations of production and distribution better than the neoclassical model the second section specifies a nash bargaining model and contrasts it with the neoclassical model of the household using the bargaining framework the third section explores in more detail possible explanations of the allocative inefficiency which seems to characterize many of the rice cultivating households

risk spillover between energy and agricultural commodity markets a dependence switching covar copula model abstract unlike previous studies we employ a relatively newer modelling technique a time varying copula with a switching dependence to characterise the conditional dependence between energy and agricultural commodity markets in a more realistic way because the dependence may switch between positive and negative correlation regimes over time a dependence switching copula more appropriately and realistically captures a dependence structure than a single copula regime our findings indicate that the lower tail dependence is much stronger in a bearish regime than in a bullish regime highlighting the importance of systematic risk spillovers during extreme downward movements furthermore the significant risk spillovers from energy to agricultural commodities are verified by measuring the conditional value at risk covar and delta covar finally some useful implications are summarized for investors portfolios and risk avoidance

the effect of global oil price shocks on china s agricultural commodities abstract this paper studied the effect of global oil price shocks on agricultural commodities in china including strong wheat corn soybean bean pulp cotton and natural rubber we regarded oil price volatility process as a combination of continuous process and jump process we not only separated oil price shocks into positive and negative categories to identify different effects on agricultural commodities in continuous process but also investigated how jump behavior influenced these agricultural commodities we found that the oil price was characterized by volatility clustering and jump behavior at the same time oil price shocks had different effects on agricultural commodities in addition the shocks on most agricultural commodities were asymmetric only natural rubber was under influence of the jump intensity of the oil price in contrast to strong wheat corn soybean bean pulp and cotton

is food financialized yes but only when liquidity is abundant abstract in this paper we investigate whether commodity index trader cit positions help to explain the increase in the correlations between agricultural commodities and equities starting around 2008 some argue institutional investors who invest both in stock and commodity markets demolish the borders between these two seemingly unrelated markets and increase correlations a recent phenomenon known as financialization yet some others argue recently correlations have decreased back to historical levels and the increase between 2008 and 2012 was merely due to a business cycle effect our results do not support one side at the expense of the other but rather shows that both factors are important in explaining the correlations between agricultural commodities and stocks furthermore we find that cits prefer to go back to their circle of competence under scarce liquidity and thus correlations decrease back to levels absent institutions hence low liquidity is a significant obstacle inhibiting financialization to occur

volatility spillover between oil and agricultural commodity markets abstract this study examines volatility transmission between oil and selected agricultural commodity prices wheat corn soybeans and sugar we apply the newly developed causality in variance test and impulse response functions to daily data from 01 january 1986 to 21 march 2011 in order to identify the impact of the food price crisis the data are divided into two sub periods the pre crisis period 01 january 1986 to 31 december 2005 and the post crisis period 01 january 2006 21 march 2011 the variance causality test shows that while there is no risk transmission between oil and agricultural commodity markets in the pre crisis period oil market volatility spills on the agricultural markets with the exception of sugar in the post crisis period the impulse response analysis also indicates that a shock to oil price volatility is transmitted to agricultural markets only in the post crisis period this paper thereby shows that the dynamics of volatility transmission changes significantly following the food price crisis after the crisis risk transmission emerges as another dimension of the dynamic interrelationships between energy and agricultural markets

the long run impact of energy prices on world agricultural markets the role of macro economic linkages the world prices of some food and energy products have followed similar large swings in recent years we investigate the long run relationship between these prices using a world computable general equilibrium model with detailed representations of food and energy markets particular attention is paid to specifying macro economic linkages which have often been overlooked in recent analysis and debate we find that the omission of these macro economic linkages has a substantial bearing on this relationship a positive relationship due to the cost push effect has been identified in most analysis but we find that the introduction of the real income effect may indeed imply a negative relationship between world food and energy prices

feedback spillover dynamics of crude oil and global assets indicators a system wide network perspective abstract crude oil the critical driver of the world economy is quick to be blamed for causing volatility in all classes of assets viz equity commodities bonds and currencies the feedback mechanism between crude oil and these four asset classes makes the volatility spillover connectedness dynamics more complex and an important area to explore henceforth we quantify and analyze the time varying system wide volatility spillover connectedness dynamics of crude oil and global asset indicators gais covering four major asset classes for the period from 2000 to 2016 additionally we have used the confluence of generalized error variance decomposition gevd and network diagrams according to the findings of this paper crude oil is affected more by the gais than vice versa thus making the crude oil price more vulnerable to volatility fluctuations in gais on a pairwise basis the study finds that commodities and currency are more tightly knit to crude oil with cadusd and gold being more sensitive to crude oil price fluctuations in addition the equity indices of the us and the uk have become more sensitive to crude oil price volatility following the gfc the study opens future discourse for portfolio managers and policymakers to explore the spillover pattern and act accordingly by mitigating risk via the compensatory mechanism of positive negative spillover pairs

world oil prices and agricultural commodity prices evidence from an emerging market abstract oil prices are thought to have direct effect on agricultural prices followed by an indirect effect through the exchange rate this paper examines the short and long run interdependence between world oil prices lira dollar exchange rate and individual agricultural commodity prices wheat maize cotton soybeans and sunflower in turkey to this end the toda yamamoto causality approach and generalized impulse response analysis for identification of the long and short run interrelationships are applied to the monthly data spanning from january 1994 to march 2010 the impulse response analysis suggests the turkish agricultural prices do not significantly react to oil price and exchange rate shocks in the short run the long run causality analysis reveals that the changes in oil prices and appreciation depreciation of the turkish lira are not transmitted to agricultural commodity prices in turkey hence our results support neutrality of agricultural commodity markets in turkey to both direct and indirect effects of oil price changes

dynamic spillovers among major energy and cereal commodity prices abstract over the past decade the sharp increases in the prices of oil and agricultural commodities have raised serious concerns about the heightened volatility of these markets and the possible negative interactions between them this article deals with the dynamic return and volatility spillovers across international energy and cereal commodity markets it also examines the impacts of three types of opec news announcements on the volatility spillovers and persistence in these markets for this purpose we make use of the var bekk garch and var dcc garch models for the daily spot prices of eight major commodities including wti oil europe brent oil gasoline heating oil barley corn sorghum and wheat our results provide evidence of significant linkages between these energy and cereal markets moreover the opec news announcements are found to exert influence on the oil markets as well as on the oil cereal relationships finally we show that the persistence of volatility decreases increases for the crude oil and heating oil gasoline returns after accounting for the opec announcements in these multivariate garch models however the results are more mixed for the cereal markets overall our results can be used to improve the risk adjusted performance by having more diversified portfolios and also serve to hedge the oil risk more effectively