高油价原因透视及对我国经济发展的影响

石油被誉为“工业的血液” ,其价格持续走高必然会对各国经济产生重大影响。据有关国际组织估计 ,每桶石油价格上涨 1 0美元 ,就会使通货膨胀上升 0 5 % ,使经济增长率降低 0 2 5 % ,失业率增长 0 0 1 %。作为世界石油消费大国和进口大国的中国 ,无疑会受到国际高油价的影响。本文回顾了 2 0 0 4年 1～ 9月国内外油价走势 ,对高油价原因进行了透视 ,分析了高油价对我国经济发展的影响 ,并提出了应对措施     

Fundamentals,Misvaluation, and Business Investment

Does stock market misvaluation affect business fixed investment? To answer this question, we provide evidence based on U.S. firm‐level panel data. We examine the orthogonality conditions for the investment Q and Euler equations, and our qualitative tests reject the null hypothesis that investment is unaffected by misvaluation (this result is not driven exclusively by the late 1990s). To measure the quantitative effects on investment, we introduce a measure of misvaluation into standard investment equations. Our estimates imply that a one‐standard‐deviation increase in misvaluation increases investment between 20% and 60% relative to the mean level of investment in the sample.     

U.S. and Latin American stock market linkages

This paper examines to what extent the Latin American equity markets of Argentina, Brazil, Chile and Mexico have become more integrated with the US equity market. We empirically measure integration by finding the dynamic conditional correlation (DCC) between each market and that in the U.S. using a DCC multivariate GARCH model. We then track how these correlations evolve over time using a smooth transition model which not only shows when greater integration first occurred but also how long it took these correlations to transition to their new levels. Our sample period stretches from December 30th, 1988 to March 26th, 2004. Results show an increase in the degree of co-movement between these countries’ equity returns and those in the U.S. although the magnitude and speed of these increases greatly varies across these four countries.     

Can Commercialization Improve the Performance of Stock Exchanges Even without Corporatization?

We examine the performance of mutual, demutualized, and publicly listed exchanges and find evidence of improved performance along the exchange governance continuum, with publicly traded exchanges exhibiting better operating performance than demutualized exchanges. However, our robustness test, focusing on the corporatized exchanges that have gone through the three phases of the governance structure, shows that the listed exchanges do not exhibit evidence of incremental gains in efficiency and profitability beyond what they achieved at the demutualization phase. We conclude that commercialization provides sufficient freedom for exchanges to exploit monopoly rents before going public, while corporatization brings about proper valuation of the exchanges’ franchise.     

基于有效波动率的市场一般性风险测度研究

鲁棒跳跃的波动率估计是波动率研究的新方向。本文首先采用蒙特卡洛模拟技术检验鲁棒跳跃波动率估计量MedRV的有效性以及预测的准确性,结果表明:MedRV能够有效鲁棒跳跃行为,得到有效波动率(EV)的估计量,同时相对于双幂次变差(BV)有更好的预测准确性。然后基于MedRV估计量构造了市场一般性风险测度,并对中国证券市场一般性风险分布特征进行了研究,结果表明:基于MedRV估计量所得到的MedRV-VaR指标可以有效摒除极端市场风险因子,得到市场一般性风险测度。     

通胀预期与物价变化关系实证研究

本文分析了通胀预期的表现形式,重点探讨了通胀预期与物价变化的关系。研究结果显示,通胀预期对不同种类的价格影响程度是不同的,对消费品价格变化影响较小,CPI对通胀预期缺乏敏感;对企业生产品价格影响程度远大于对消费品价格的影响。     

货币政策为何及如何关注食品价格

食品价格是通货膨胀压力的灵敏反映指标,且由于食品部门供应价格弹性、存货缓冲能力、需求价格弹性和生产效率相对较低,产品同质化程度相对较高,食品价格的弹性明显高于非食品价格,加之在通货膨胀和经济周期过程中,食品部门具有需求顺周期和供给逆周期的特征,食品价格波动幅度往往远高于非食品价格,存在一定程度的超调。因此,文章建议货币政策应充分关注食品价格,同时适当提高对食品价格波幅的容忍程度。     

基于BP神经网络的股价趋势分析

对BP神经网络的算法和结构进行了介绍,并基于MATLAB的BP网络的工具箱.对浦发银行近一年交易日的数据进行了训练和测试,获得了一定的预测精度.最后还对波动期股价预测的难易.股价涨幅预测的难度以及输入变量对BP网络预测股价能力的影响等进行了讨论.基于实验结果,得出了基于BP神经网络的数学模型能一定程度上实现对股价趋势判断的结论.     

亏损上市公司价值相关性实证分析

会计盈余是影响上市公司股票价值的一个重要因素。以我国亏损上市公司为对象,根据亏损性质的不同将亏损公司分为单赤字公司、虚双赤字公司、实双赤字公司以及三赤字公司四类。实证分析显示：亏损最为严重的是三赤字公司,其会计盈余和权益账面价值与股价之间均不存在显著的相关性。     

股价波动、通货膨胀与固定资产投资——基于协整和VEC模型的经验证据

经验证据表明,我国股票市场时全社会固定资产投资的影响作用还比较小,股票市场对固定资产投资的冲击在部分时段是负效应,可能存在部分"挤出效应".而影响固定资产投资的主要因素是GDP的变动.另外在我国,通货膨胀率对固定资产投资的影响比较明显.从短期来看,固定资产投资也带动了通货膨胀.国内固定资产投资的波动不仅受偏离均衡的影响,还受到GDP、Cpi、上证综合指数与存款利率水平自身变动的影响.央行应加强审慎的宏观调控,优化信贷结构,加强农村水利建设的长期投资,为经济结构调整和经济增长方式的转变提供稳定的货币金融环境.