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国际粮食价格影响因素实证分析
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作者 公茂刚 《农业经济与管理》 2016年第3期35-43,共9页
利用1964~2014年数据实证分析国际粮食价格的影响因素。通过协整检验,认为国际粮食价格与世界农业生产率、世界粮食超额供给量、世界粮食库存量、国际原油价格、美元有效汇率间存在协整关系。国际粮食价格受到世界农业生产率、世界粮... 利用1964~2014年数据实证分析国际粮食价格的影响因素。通过协整检验,认为国际粮食价格与世界农业生产率、世界粮食超额供给量、世界粮食库存量、国际原油价格、美元有效汇率间存在协整关系。国际粮食价格受到世界农业生产率、世界粮食超额供给量、世界粮食库存量和美元有效汇率显著负向影响;受到世界石油价格显著正向影响。从误差修正模型结果看,各变量及误差修正项系数的统计检验不显著,表明变量间只存在长期趋势关系,无短期调整。可能与采用年度数据而非跨度较小的月度数据或周数据有关。提高农业生产效率、增加世界粮食产量是稳定国际粮食价格的关键举措。通过分析世界粮食消费量和美元汇率变动情况,预判国际粮食价格走向,提早采取措施保障粮食安全。 展开更多
关键词 国际粮食价格 农业生产率 美元有效汇率 石油价格
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Does supplier concentration matter to investors during the COV1D-19 crisis:evidence from China?
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作者 Louis T.W.Cheng Jack S.C.Poon +1 位作者 Shaolong Tang Jacqueline Wenjie Wang 《Financial Innovation》 2022年第1期2289-2316,共28页
The literature shows that investor attention to customer–supplier disclosure increases when suppliers’information arrival is anticipated.Due to the widespread of city lockdowns in China and the implementation of soc... The literature shows that investor attention to customer–supplier disclosure increases when suppliers’information arrival is anticipated.Due to the widespread of city lockdowns in China and the implementation of social distancing to control the COVID-19 pandemic,investor attention to potential disruption of the supply chain spikes,leading to a price devaluation for firms with high supplier concentration risk.We find that a higher degree of supplier concentration is related to more serious stock price declines over the short-term and medium-term windows right after the Wuhan lockdown.This result lends support to the argument that the concentration risk of suppliers is a significant consideration for China stock market investors,especially under the potential financial distress at the firm level induced by the COVID-19 crisis. 展开更多
关键词 COVID-19 Supplier concentration Supplier disclosure Stock price effect Industry neutral portfolio
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What Drives China’s Transformational Growth:Technology,Efficiency or Factor Cost?
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作者 何小钢 张宁 《China Economist》 2015年第5期4-18,共15页
关键词 growth transformation transformational growth technological progress effect factor price adjustment effect effect of efficiency gains
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Fiscal Pressure,Land Finance and Ratchet Effects of House Prices 被引量:1
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作者 Yunfeng Tang Chunhua Ma 《China Finance and Economic Review》 2018年第1期73-94,共22页
In this paper,we focus on the issues of local governments’fiscal pressure,land finance and house prices,and systematically analyze how local governments’fiscal pressure and land finance lead to China’s ratcheting u... In this paper,we focus on the issues of local governments’fiscal pressure,land finance and house prices,and systematically analyze how local governments’fiscal pressure and land finance lead to China’s ratcheting up of house prices.The results show that to release the fiscal pressure,local governments tend to increase land revenue and obtain high real estate related revenue by raising house prices.In this sense,the increase of the land transfer price will result in the increase of the cost of real estates,and eventually leading to the increase of house prices.That is to say,local governments’fiscal pressure will not only result in the increase of house prices directly but also consolidate the ratchet effects of house prices. 展开更多
关键词 land finance fiscal pressure ratchet effects of house prices
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Dynamic Pricing with Stochastic Reference Price Effect
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作者 Xin Chen Zhen-Yu Hu Yu-Han Zhang 《Journal of the Operations Research Society of China》 EI CSCD 2019年第1期107-125,共19页
We study a dynamic pricing problem of a firm facing stochastic reference price effect.Randomness is incorporated in the formation of reference prices to capture either consumers’heterogeneity or exogenous factors tha... We study a dynamic pricing problem of a firm facing stochastic reference price effect.Randomness is incorporated in the formation of reference prices to capture either consumers’heterogeneity or exogenous factors that affect consumers’memory processes.We apply the stochastic optimal control theory to the problem and derive an explicit expression for the optimal pricing strategy.The explicit expression allows us to obtain the distribution of the steady-state reference price.We compare the expected steadystate reference price to the steady-state reference price in a model with deterministic reference price effect,and we find that the former one is always higher.Our numerical study shows that the two steady-state reference prices can have opposite sensitivity to the problem parameters and the relative difference between the two can be very significant. 展开更多
关键词 Reference price effect Dynamic pricing Stochastic optimal control
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Direct energy rebound effect for road transportation in China
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作者 Donglan ZHA Pansong JIANG Xue ZHANG 《Frontiers of Engineering Management》 CSCD 2023年第4期597-611,共15页
The enhancement of energy efficiency stands as the principal avenue for attaining energy conservation and emissions reduction objectives within the realm of road transportation.Nevertheless,it is imperative to acknowl... The enhancement of energy efficiency stands as the principal avenue for attaining energy conservation and emissions reduction objectives within the realm of road transportation.Nevertheless,it is imperative to acknowledge that these objectives may,in part or in entirety,be offset by the phenomenon known as the energy rebound effect(ERE).To quantify the long-term EREs and short-term EREs specific to China’s road transportation,this study employed panel cointegration and panel error correction models,accounting for asymmetric price effects.The findings reveal the following:The long-term EREs observed in road passenger transportation and road freight transportation range from 13%to 25%and 14%to 48%,respectively;in contrast,the short-term EREs in road passenger transportation and road freight transportation span from 36%to 41%and 3.9%to 32%,respectively.It is noteworthy that the EREs associated with road passenger transportation and road freight transportation represent a partial rebound effect,falling short of reaching the magnitude of a counterproductive backfire effect.This leads to the inference that the upsurge in energy consumption within the road transportation sector cannot be solely attributed to advancements in energy efficiency.Instead,various factors,including income levels,the scale of commodity trade,and industrial structure,exert more substantial facilitating influences.Furthermore,the escalation of fuel prices fails to dampen the demand for energy services,whether in the domain of road passenger transportation or road freight transportation.In light of these conclusions,recommendations are proffered for the formulation of energy efficiency policies pertinent to road transportation. 展开更多
关键词 road transportation direct energy rebound effect asymmetric price effects panel data model
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