The economics of oil,biofuel and food commodities

We study the effects on the food price of introducing biofuels as a substitute for fossil fuel in the energy market. Energy is supplied by a price-leading oil cartel and a competitive fringe of farmers producing biofuel. Biofuel production shares a finite land resource with food production. A positive relationship results between energy and food prices. We establish that the equilibrium price of food will be growing as long as the oil stock is being depleted, and beyond if demand is growing. An analysis of the effects of the productivity of land use in either the food or the biofuel sectors is carried out. It is shown that, with a highly inelastic demand for food, an increase in the productivity of land in agriculture will decrease the price of food in the short-run, only to increase it in the long-run as the stock of fossil fuel is depleted.     

Profitability and supply price in the US domestic oil industry: implications for the political economy of oil in the twenty-first century

In May 2001, the US Government's National Energy Policy DevelopmentGroup proposed to increase investment in domestic oil resourcesand to diversify further the sourcing of US oil imports by increasingproduction in new petroleum provinces. The paper argues thatboth strands of this policy are dependent upon a third, unstated,objective—to ensure that OPEC retains sufficient marketpower to prevent the sort of collapse in world oil prices thatoccurred in 1998–99. The consequences of that collapse,when the real price of US oil fell to its lowest level in 53years, are explored. Finally, it is argued that the outcomeof the crisis was a rapprochement between OPEC and the US. Itis suggested that the consensus between the US and OPEC as tothe desired range within which the world oil price should moveis likely to survive any temporary political disturbances.     

Healthy food, unhealthy food and obesity

We examine whether the latent behavioral mechanisms embedded in two “price effects” explanations of the obesity problem are operative. Our findings lend support to the hypothesis that falling food price is one likely cause of the obesity epidemic.     

The non-linear impact of oil price on the oil demand

ABSTRACT

A panel smooth transition regression model was adopted to analyse the non-linear impact of oil prices on oil demand. Data for 42 countries was obtained from the International Energy Agency for the time period spanning from January 1990 to June 2017. The results indicate that a threshold value does exist. Furthermore, when the oil price was lower than this threshold value, a positive relationship between oil price and oil demand was observed. When the price of oil was higher than the threshold value, however, a negative relationship between price and demand was found.     

冲击世界未来的能源问题：油价低迷走势及其对国际关系的影响

本文介绍了非政府机构美国外交关系委员会亚洲能源和安全研究项目组关于世界未来2 0年石油供应将持续保持低价的论点 ,这对世界石油供应短缺的预测提出了挑战。该项研究认为 ,这对美国对外关系政策和国家安全政策也构成了严峻的挑战     

Quantile spillovers and dependence between Bitcoin,equities and strategic commodities

This paper has two aims. We first examine the dynamic spillovers between Bitcoin and 12 developed equities, gold, and crude oil for different market conditions using a Bayesian Time-Varying Parameter Vector Autoregressive (TVP-VAR) model with daily spot prices. Our econometric approach enables us to capture the left and right tails as well as the shoulders of the return distribution corresponding to volatility spillovers under the bear, normal, and bull market states among these financial assets. We quantify and trace the dependence and directional predictability from Bitcoin to other assets using the sample cross-quantilogram. Our key findings offer convincing evidence of time variation in the level of volatility. Spillovers between Bitcoin and other financial assets intensify during extreme global market conditions. Secondly, results from the cross-quantilogram indicate strong dependence and positive directional predictability between Bitcoin and most equities and crude oil when market returns are bullish. However, during the bearish market period, there is negative dependence and predictability from Bitcoin to stocks in Finland, the Netherlands, the U.S.A, and the crude oil market only. This implies that Bitcoin can act as a hedge to stocks in Finland, the Netherlands, the U.S.A, and the crude oil market. However, insignificant dependence and directional predictability from Bitcoin to the remaining assets indicate that Bitcoin may act as a safe-haven to these assets during bearish markets. Our findings hold important implications for both international investors and portfolio managers who consider Bitcoin as part of their portfolio diversification and other investment strategies.     

Revisiting the oil price and stock market nexus: A nonlinear Panel ARDL approach

In this paper, we re-examine the relationship between oil price and stock prices in oil exporting and oil importing countries in the following distinct ways. First, we account for possible nonlinearities in the relationship in order to quantify the asymmetric response of stock prices of these two categories to positive and negative oil price changes. Secondly, in order to capture within group differences, we allow for heterogeneity effect in the cross-sections by formulating a nonlinear Panel ARDL model which is the panel data representation of the Shin et al. (2014) model and also analogous to the non-stationary heterogenous panel data model. Thirdly, we evaluate the relative predictability of the linear (symmetric) and nonlinear (asymmetric) Panel ARDL models using the Campbell and Thompson (2008) test. Our results depict that stock prices of both oil exporting and oil importing groups respond asymmetrically to changes in oil price although the response is stronger in the latter than the former. This finding is further corroborated by the out-of-sample forecast results suggesting that the inclusion of positive and negative oil price changes in the predictive model for stock prices will produce better forecast results only for the oil importing countries. Our results are robust to different oil price proxies, lag structure and in-sample periods. Overall, the dichotomy between oil exporting and oil importing countries has implications on oil price-stock nexus.     

我国石油储备的必要性分析

本文从经济学供需分析的视角,采取计量的方法,分析我国石油储备建立的必要性。建立石油储备是我国国内需求不断攀升的需要,是我国国民经济稳定发展的需要,可以避免油价的大幅波动,减少石油供应中断风险,减少国家的外汇支出。     

Exchange rates of oil exporting countries and global oil price shocks: a nonlinear smooth-transition approach

This paper models logistic and exponential smooth transition adjustments of real exchange rates for six major oil-exporting countries in response to different shocks affecting oil prices. The logistic form captures asymmetric and the exponential form symmetric adjustments in regards to positive and negative oil price shocks. We chose oil-exporting countries that do not peg their exchange rates. For most countries, we detect no statistically significant non-linearities for the adjustment process of real exchange rate returns, be they asymmetric or symmetric, in response to oil supply shocks, idiosyncratic oil-market-specific shocks, and speculative oil-market shocks. Exceptions are oil supply shocks in the UK and possibly Brazil, where exchange rates respond nonlinearly, though the effects are symmetric for both countries. On the other hand, global aggregate demand shocks, which are shocks not originating directly in the oil market, have nonlinear asymmetric effects on real exchange rate returns for Canada, Mexico, Norway and Russia, and nonlinear symmetric effects for Brazil and the UK.     

The impacts of weather variations on energy demand and carbon emissions

This paper examines the impacts of climate fluctuations on carbon emissions using monthly models of US energy demand. The econometric analysis estimates price, income, and weather elasticities of short-run energy demand. Our model simulations suggest that warmer climate conditions in the US since 1982 slightly reduced carbon emissions in the US. Lower energy use associated with reduced heating requirements offsets higher fuel consumption to meet increased air-conditioning needs. The analysis also suggests that climate change policies should allow some variance in carbon emissions due to short-term weather variations.     

Correlation dynamics of crude oil with agricultural commodities: A comparison between energy and food crops

This study elucidates plausible correlation between crude oil and agricultural commodities. We assess whether the conditional correlation of crude oil with energy crops (e.g., corn and soybeans) is different from that of food crops (e.g., oats and wheat). We find a stronger correlation of about 20 percent between returns of crude oil and energy crops. However, the correlation coefficient value for oil-oats and oil-wheat is as low as eight percent. We add to the literature by exploring correlation in a dynamic context using three different GARCH models and found that conditional correlation between crude oil and energy corps is relatively high. In order to reduce risk associated with crude oil price fluctuations, this study also examined hedging possibilities against crude oil by investment in agricultural commodities. Although hedging effectiveness is low with all underlying agricultural commodities, soybeans provide relatively better hedging possibilities compared to other agricultural crops.     

Structural transformation and the oil price

What part of the high oil price can be explained by structural transformation in the developing world? Will continued structural transformation in these countries result in a permanently higher oil price? To address these issues I identify an inverted-U shaped relationship in the data between aggregate oil intensity and the extent of structural transformation: countries in the middle stages of transition spend the highest fraction of their income on oil. I construct and calibrate a multi-sector, multi-country, general equilibrium growth model that accounts for this fact by generating an endogenously falling aggregate elasticity of substitution between oil and non-oil inputs. The model is used to measure and isolate the impact of changing sectoral composition in the developing world on global oil demand and the oil price in the OECD. I find that structural transformation in non-OECD countries accounts for up to 53% of the oil price increase in the OECD between 1970 and 2010. However, the impact of structural transformation is temporary. Continued structural transformation induces falling oil intensity and an easing of the upward pressure on the oil price. Since a standard one-sector growth model misses this non-linearity, to understand the impact of growth on the oil price, it is necessary to take a more disaggregated view than is standard in macroeconomics.     

Macroeconomic and financial effects of oil price shocks: Evidence for the euro area

The paper investigates the macroeconomic and financial effects of oil price shocks for the euro area, with a special focus on post-2009 oil price dynamics and the recent slump. The analysis is carried out episode by episode, by means of a large-scale time-varying parameter model. We find that recessionary effects are triggered by oil price hikes and, in some cases, also by oil price slumps. In this respect, the post-2009 run-up likely contributed to sluggish growth, while uncertainty and real interest rate effects are the potential channels through which the 2014 slump has depressed aggregate demand and worsened financial conditions. Also in light of the zero interest rate policy carried out by the ECB, in so far as the Quantitative Easing policy failed to generate inflationary expectations, a more expansionary fiscal policy might be required to counteract the deflationary and recessionary threat within the expected environment of soft oil prices.     

The interpretive flexibility of oil and gas pipelines: Case studies from Southeast Asia and the Caspian Sea

Based on research interviews and field research, this article explores the “interpretive flexibility” of two large pipelines: the $4.6 billion Baku-Tbilisi-Ceyhan (BTC) oil pipeline exporting petroleum from the Caspian Sea near Azerbaijan and then traversing parts of Georgia and Turkey; and parts of the $14.2 billion Trans-ASEAN Gas Pipeline (TAGP) Network connecting the gas reserves of Indonesia, Myanmar, and Thailand with each other and Singapore. Each pipeline is the product of differing interpretations and ideologies, meaning they have “interpretive flexibility” because their meaning is under constant interpretation. The article depicts four differing interpretive frames for each pipeline, revealing the views of the Association of Southeast Asian Nations, government of Thailand, government of Myanmar, and state-owned energy Malaysian energy company Petronas for the TAGP, and the World Bank Group, British Petroleum, European Union, and the government of Azerbaijan for the BTC. The article finds that pipelines not only mark the physical landscape and distribute energy fuels, they also transfer what were once customary public resources into private hands, concentrate political power, facilitate human rights abuses and possible acts of genocide, become intertwined in national discourses of revitalization and strength, and validate distinct approaches to economic and social development.     

Asymmetric responses of money demand to oil price shocks in Saudi Arabia: a non-linear ARDL approach

Saudi Arabia is an open oil-based economy with fixed exchange rates; therefore, it has limited monetary policy autonomy. Using non-linear autoregressive distributed lag approach, this article investigates the asymmetric effects of oil price shocks on the demand of money in Saudi Arabia over the period 1990:Q1–2014:Q4. The empirical results show evidence of positive long run but asymmetric effects of oil price shocks on the money demand. In particular, we find that the positive oil price shocks are more important than negative shocks. Therefore, two policy responses can be considered: either sustaining the fixed exchange rate regime and following an economic diversification policy or switching towards a flexible exchange rate regime to achieve price stability. In that case, the existence of a stable money demand function in Saudi Arabia is a necessary precondition for adopting a monetary policy strategy targeted to price stability using instruments like money targeting.     

The interdependence of global oil price,China's stock price and economic policy uncertainty

This investigation examines the interaction among global oil price (OP), China's stock price (SP) and China's economic policy uncertainty (EPU) during the period of 2005:01 and 2017:12. A rolling window Toda‐Yamamoto causality method shows a complex time‐varying relationship. Bilateral causalities between these variables mostly accompany by sharp fluctuations in global or China's economy. Taking into account the inherent consistency of this time‐varying relation, the causal steps approach shows EPU follows a partial but time‐varying mediator process during crisis periods, which suggests EPU is one of mediator variables in this transmission mechanism. The mediator role of EPU in the transmission mechanism of OP and SP has not been paid enough attention before. Our findings provide a new direction for investors from the perspective of policy changes to deal with risks caused by OP and SP fluctuations especially when the financial market experiencing huge fluctuations.     

企业降价与总收益关系的新认识

随着环境的变化,企业有时候要调低产品价格。本文针对一些企业错误地应用关于降价与总收益关系的传统结论的现象,结合数学和经济学,提出了很多命题,对降价与总收益之间的关系揭示得很清楚,对于传统的需求价格弹性理论关于降价与总收益之间关系的不完全准确认识的一种修正,也是对需求价格弹性理论应用的拓展;且本文分别用图形形象地表示出降价与总收益之间的关系,结合企业在调低价格后给予一定的指导——企业降价后还要进行跟踪调查、还要根据效果采取相应措施、要关注客户需求量的变化、降价不是拍脑袋的事情,这具有一定的现实意义。     

石油行业上市公司财务绩效综合评价研究

石油是一种不可再生的优质基础能源,其供应量的大小不仅关系到国家经济社会的发展和人民生活的质量,而且对国防安全也起到了重要的作用.由于石油行业上市公司在石油产品供应中起着重要的作用,是国家石油有效供应的微观主体,因此,如何有效地衡量石油行业上市公司整体运营绩效对于准确把握国家石油供应能力有着重要的意义.基于此,石油行业上市公司在石油产品供应中所起的作用,本文构建了石油行业上市公司财务评价指标体系,并运用因子分析模型对我国13家石油行业上市公司2010年的财务绩效进行了综合评价,得出了各上市公司财务绩效的综合排序,并从股本扩张能力、偿债能力、盈利能力、资产管理能力和成长能力五个方面探讨了其影响因素,为各石油行业上市公司财务业绩的改进及石油的可特续供应提供了科学的决策依据和方向.     

Reconsidering the macroeconomics of the oil price in Germany: testing for causality in the frequency domain

This paper reconsiders the macroeconomics of the oil price for Germany. It investigates whether causality between the oil price and a selection of both macroeconomic and financial market variables differs between frequency bands. Both a bivariate frequency-wise causality measure and its higher-dimensional extension are applied. The main findings are that short-run causality exists between the oil price and variables such as short-term interest rates and the German share price index, while long-run causality is found between the oil price and long-term interest rates. Moreover, the oil price predicts the consumer price index at a high number of different frequencies, while no significant causality is found to run from the oil price to industrial production and the unemployment rate.      

美国的食品安全管理体系

美国是一个十分重视食品安全的国家，有关食品安全的法律法规在美国非常繁多，既有《联邦食品、药物和化妆品法》、《食品质量保护法》和《公共卫生服务法》等综合性法规，也有《联邦肉类检查法》等非常具体的法律。这些法律法规覆盖了所有食品，为食品安全制定了非常具体的标准以及监管程序。另外，联邦政府和地方政府负责食品安全的部门构成了一套综合有效的安全保障体系，对食品从生产到销售的各个环节实行严格的监管。