国际农产品价格如何影响了中国农产品价格?

本文使用月度数据考察国际农产品价格是否影响中国农产品价格,以及影响程度和可能的影响机制。在控制了其他影响因素的条件下,本文证实了国际农产品价格对国内价格具有经济意义上的显著影响,各种农产品的国内价格对相同产品国际价格的反应程度存在较大差异,玉米、大米和大豆价格的国际价格弹性介于0.20到0.36之间,小麦的国际价格弹性为0.05左右,国内外农产品市场间高度的整合关系主要是通过国际贸易建立的。中国在未来为保持粮价稳定需要加大对农业的扶持力度,加强国内农产品储备,合理地对农产品贸易进行管制,建立农产品价格预警机制,并通过财政补贴等手段平抑因国际价格波动而带来的国内农产品价格上涨。     

纵向关联市场间的价格传递

本文运用均衡移动模型研究农业生产者与食品零售商之间的纵向价格传递关系。模型建立在如下假设之上：即农产品（食品）营销企业在零售环节拥有寡占卖方力量、在农产品收购环节拥有寡占买方力量、营销企业所需要的农产品投入与其他营销投入之间存在一定替代关系并拥有规模报酬可变的技术。结果表明，市场力量和规模报酬对价格传递的影响十分复杂，一方面取决于农产品供给函数和食品需求函数的具体形式，另一方面还取决于外生冲击作用下农产品收购环节与食品零售环节市场力量变化的相对幅度。     

纵向关联市场间的价格传递

本文运用均衡移动模型研究农业生产者与食品零售商之间的纵向价格传递关系。模型建立在如下假设之上:即农产品(食品)营销企业在零售环节拥有寡占卖方力量、在农产品收购环节拥有寡占买方力量、营销企业所需要的农产品投入与其他营销投入之间存在一定替代关系并拥有规模报酬可变的技术。结果表明,市场力量和规模报酬对价格传递的影响十分复杂,一方面取决于农产品供给函数和食品需求函数的具体形式,另一方面还取决于外生冲击作用下农产品收购环节与食品零售环节市场力量变化的相对幅度。     

期货市场与现货市场之间的价格研究--中国农产品市场的经验

本文借助于信息共享模型与波动溢出效应模型对我国大豆和小麦的期、现货市场之间的价格发现进行了多层次的实证研究,定量描述了期、现货市场在价格发现中作用的大小,深入刻画了我国农产品期、现货市场之间的动态关系.研究结果显示:大豆期、现货价格之间存在双向引导关系,小麦仅存在期货对现货的单向引导关系;期、现货市场均扮演着重要的价格发现角色,且期货市场在价格发现中处于主导地位;期、现货市场之间均存在双向波动溢出关系,但现货市场来自期货市场的波动溢出效应均强于期货市场来自现货市场的波动溢出效应;并且,随着期货市场的发展,期、现货市场之间的波动溢出程度均呈逐渐增强态势.     

国内外农产品价格传导路径

对国内外农产品价格及其涨幅进行了对比分析。从国际农产品价格、国际原油价格向国内农产品价格传导的角度,利用结构方程模型探讨了国内外农产品价格的传导路径。结果显示:国际农产品价格对国内农产品价格具有直接的传导效应,国际原油价格对国内农产品价格具有间接的传导效应,国内货币政策对国内农产品价格的间接影响较为显著。     

农产品价格波动:形成机理与市场调控

本文利用X-11季节调整方法和H-P滤波法分析21世纪以来农产品价格波动周期、趋势及特点,并从需求、供给、技术、气候、产业组织形式、市场状况等方面分析农产品价格形成的因素变化,建立计量模型定量模拟农产品价格形成的框架体系。在此基础上,提出在市场经济体制下农产品价格的调控体系和思路。     

基于农民视角下的农产品市场交易价格风险分析

农产品价格是决定农民生产收益的主要因素。农产品市场风险主要表现为农产品市场价格的波动。本文试图从农民视角出发分析农产品市场价格风险的主要原因,并提出规避农产品市场价格风险的对策建议。     

国际农产品价格波动对国内农产品价格的影响分析

本文基于2002年1月—2010年12月的月度数据,利用协整分析、格兰杰因果关系检验、误差修正模型及脉冲响应函数等方法对国际农产品价格(以棉花、玉米、大豆、小麦为代表)和国内农产品价格之间的关系进行了实证分析。结果表明,国际国内农产品价格间存在长期均衡关系;国际农产品价格向国内价格传导的过程中具有由短期波动到长期均衡的调整过程。国际国内农产品市场反向因果关系并不成立,国内农产品价格对国际农产品价格的影响有限。脉冲响应函数分析表明,国际农产品价格冲击对国内农产品价格有正向影响。     

中国农产品价格波动对通货膨胀的影响分析

近年来,伴随着农产品价格和物价水平的不断走高,我国经济社会所面临的通货膨胀压力也逐渐加大。首先通过对农产品价格波动与通货膨胀进行相关性分析,然后构建简单线性回归模型,并在此基础上,运用计量经济学方法对农产品价格波动与通货膨胀的关系进行实证研究。研究结果表明,农产品价格波动对通货膨胀有着较大的影响,农产品价格波动与通货膨胀之间具有协整关系和双向的格兰杰因果关系。最后,根据实证结果为我国的经济社会持续健康发展提出了相关的政策建议。     

基于农民视角下的农产品市场交易价格风险分析

农产品价格是决定农民生产收益的主要因素.农产品市场风险主要表现为农产品市场价格的波动.本文试图从农民视角出发分析农产品市场价格风险的主要原因,并提出规避农产品市场价格风险的对策建议.     

Land price diffusion across borders – the case of Germany

ABSTRACT

Land market regulations are often justified by the assumption that activities of foreign and non-agricultural investors drive up prices in domestic land markets. However, empirical knowledge about the dynamics of agricultural land prices across borders is sparse. Using the German reunification as a natural experiment, we study the effect of the former inner German border on the dynamics of agricultural land prices in East and West Germany. We apply a land price diffusion model with an error correction specification to analyse spatial agricultural land markets. A novel feature of our model is its ability to distinguish price diffusion within states and across state borders. We provide evidence for a persistent border effect given that the fraction of spatially integrated counties is larger within states than across the former border. Moreover, we observe non-significant error correction terms for many counties along the former border. From a policy perspective, it is striking to realize that even 25 years after German reunification, pronounced land price differences persist. It is quite likely that price diffusion through existing borders within the EU would take even more time given language barriers, different institutional frameworks, and information asymmetries between domestic and foreign market participants.     

Financialization of agricultural commodities: Evidence from China

Speculation in the commodity futures market distorts commodity prices, driving them away from rational levels. This phenomenon, which is known as the financialization of commodities, has raised significant concerns in recent years. Particularly, in the agricultural market, ‘financialized’ commodities have been blamed for high world food prices. In this paper, we examine the financialization of agricultural commodities in China. To do so, a time-varying copula is employed to investigate the dependence structure between commodities and stock markets. Four insightful results are obtained. First, positive correlations between agricultural commodities and stock markets demonstrate the financialization of agricultural commodities. Second, the identified correlations are time-varying and idiosyncratic with respect to products. Third, the agricultural commodity market is more closely correlated with the domestic stock market than with the overseas market. Fourth, a growing dependence between commodities and the stock markets is detected and the co-movement became stronger after the global financial crisis.     

异质性预期、投资者行为与房价波动：上海和广州的双城记?

房地产市场中存在大量的投资者,其市场行为会使房价出现大幅的波动,从而引起市场不稳定。文章在引入投资者异质性预期假设的基础上,构建了包含房地产消费者、投资者、供给者在内的房地产市场均衡模型,分析了房地产市场中基本面型投资者和趋势型投资者的异质性行为对房价变动的影响,并利用上海和广州两个一线城市的实际数据进行了对比分析。研究结果表明：在房地产市场中,两类投资者对于未来房价不同的预期以及投资行为会引起房价的变动;上海投资者的行为整体上会使上海的房价始终处于不断上涨的趋势中,而广州投资者的行为会随着投资策略的转变而使静态下的“整体上推动房价趋势型变化”转变为“整体上将房价‘拉回’基本面价格”;房地产市场中的投资者占比会显著影响房价的变动趋势,当基本面型投资者占比上升时,房价偏离度和房价变动率降低,而当这类投资者占比达到峰值时,房价会出现拐点;投资者之间的策略转换速度也会通过引起基本面型投资者占比的变化,引起房价的频繁波动,而且策略转换速度越快,房价波动越频繁。     

Domestic market integration and the law of one price in Brazil

This article presents the first assessment of domestic market integration in Brazil using the law of one price. The law of one price is tested using two panel unit root methodologies and a unique data set comprising price indices for 51 products across 11 metro-areas. We find that the law holds for most tradable products and, not surprisingly, nontradable products are found to be less likely to satisfy the law of one price. While these findings are consistent with evidence found for other countries, price convergence occurs very slowly in Brazil, suggesting relatively limited domestic market integration.     

Study on the price co-movement among the Asia Pacific,European and Chinese coal markets – based on the empirical analysis of MS-VEC model

In this article, based on weekly data of the three major coal markets (the Asia Pacific, Europe and China) from March 2008 to November 2014, an empirical research on their mutual influence and price co-movement effect among the three major coal markets is conducted by using the Co-integration Theory, Granger Causality Test and markov switching-Vector Error Correction (MS-VEC) model. The conclusions are as follows. (1) There exists a long-term cointegration relationship and bidirectional causality relationship between coal prices at home and abroad, and the influences of foreign coal markets on the domestic coal markets are stronger than the influences of domestic coal markets on foreign coal markets, and thus the interaction between the two markets leads to asymmetric linkage effects. (2) Compared with the VEC model, the MS-VEC model can reflect the nonlinear feature of price co-movement effects. (3) There exists an inherent adjustment mechanism between domestic and foreign coal markets, i.e. the coal prices will be self-revised continuously until a long-term equilibrium state is achieved when a deviation from the equilibrium state occurs. (4) There exists a co-movement effect which varies with the change of regime among the three coal prices, and the self-maintenance is strong and the status transfer phenomenon is clear in different regimes.     

大宗农产品价格风险评估——基于小波神经网络-Bootstrap方法的实证研究

构建了一个将小波神经网络与Bootstrap抽样相结合的价格风险评估模型。采用国际通用的VaR(在险价值)风险指标评估了国内小麦、水稻、玉米、大豆和棉花5种主要大宗农产品现货价格的风险水平,仿真研究了以上大宗农产品价格下跌风险和价格上涨风险的分布特征。结果表明:按价格风险水平由高到低对5种主要大宗农产品进行排序依次为棉花、大豆、玉米、小麦和水稻;从风险均值来看,我国大宗农产品价格特别是粮食价格的风险处于较低水平;从风险的经验分布来看,除大豆外,其他大宗农产品(特别是小麦、水稻和玉米)的涨价风险高于跌价风险;5种农产品的价格均存在偏度风险和峰度风险。     

A股市场上的“中石油魔咒”现象及其解释

文章针对A股市场上流传甚广的"中石油魔咒"现象,首次从基本面角度进行了解释,认为造成这一现象的根本原因是国际原油价格对我国股票市场存在显著的负向溢出效应,即当国际原油价格上涨时,对中石油个股产生利好,但对整体宏观经济却构成利空,因而中石油股票价格上涨,整个股票市场却会下跌。进一步研究还发现,这种负向溢出效应具有非线性特征,表现为国际原油价格上涨对股票市场的打压力度要大于其下跌对股票市场的提升力度。这提醒A股投资者相对于国际原油价格下跌,要更加关注国际原油价格上涨带来的投资风险。     

Assessing the Degree of Spot Market Integration for U.S. Natural Gas: Evidence from Daily Price Data

This paper assesses the degree of market integration in the U.S. natural gas market following the FERC’s ‘open access’ reforms. Daily spot prices at 76 market locations from 1993 to 1997 are used to examine the geographic extent of the market and the speed with which market forces move prices toward equilibrium in the face of ongoing price shocks. The empirical results suggest that the East and Central regions form a highly integrated market, but that this market is quite segmented from the more loosely integrated Western market.     

国际谷物价格波动对中国经济的影响研究

运用有向无环图(DAG)方法并结合基于SVAR模型的脉冲响应和预测方差分解方法分析国际大宗谷物价格波动对中国经济的传导途径及其效应。研究发现,国际食品价格波动影响国内消费物价水平和工业产出的传导途径不明显,其波动只能直接传导到国内的农副产品购进价格,进而直接或间接通过影响国内工业品出厂价格传导到国内消费物价水平,为中国治理通货膨胀提供了理论依据。