外商直接投资对国内投资挤入挤出效应的区制动态分析

本文以1999年到2013年的外商直接投资和国内投资的季度数据为基础,采用MS-VECM模型对我国外商直接投资与国内投资的区制状态、区制相关性以及转移概率进行了实证分析。结果表明,在整个样本期内,外商直接投资对我国的国内投资总体上存在挤入效应,但从动态时间路径上看,在经济运行的不同时期,外商直接投资对我国国内投资的影响并不一致,在1999年一季度至2005年三季度期间表现为对国内投资的挤出效应,而在2005年四季度至2013年四季度期间则表现为挤入效应     

投资者情绪对基金羊群效应的影响研究

大量研究表明我国证券投资基金存在羊群效应,然而却很少对影响基金羊群效应的因素展开进一步的实证研究。基于此,本文利用主成分分析法测量投资者情绪,利用前十大流通股东中证券投资基金的家数来测量基金羊群效应的程度,研究投资者情绪指标是否对基金羊群效应产生影响。研究结果表明,投资者情绪是证券投资基金形成羊群效应的重要因素之一,基金经理在观察到上一期投资者悲观情绪(乐观情绪)时会做出负反馈策略。     

Estimation of investment project profitability in the modified Cantor-Lipman model

The profitability of investment projects in the modified Cantor-Lipman model is analyzed. The possibility of making lower estimates of the investment project profitability by searching for periodic trajectories is studied. The necessary and sufficient conditions for the existence of a trajectory with the period 2 are derived. The sufficient conditions ensuring the existence of a certain trajectory with the period 2 are derived in the form of explicit requirements on the investment project structure.     

基于模糊集合论的实物期权定价方法

实物期权的定价在风险投资决策过程中具有重要意义.传统的实物期权定价方法忽略标的资产价值和投资成本的模糊性,从而可能导致错误的投资决策.本文主要研究了具有模糊标的的资产价值和投资成本情形时的实物期权定价模型.文中将这些模糊因素分别视为模糊数和模糊变量,然后运用模糊集合论,结合B-S期权定价理论,对实物期权进行定价,得到了基于模糊集合论的实物期权定价模型.     

OPTIMAL INVESTMENT IN THE PROTECTION OF A VULNERABLE BIOLOGICAL RESOURCE

It is assumed that the probability of destruction of a biological asset by natural hazards can be reduced through investment in protection. Specifically a model, in which the hazard rate depends on both the age of the asset and the accumulated invested protection capital, is assumed. The protection capital depreciates through time and its effectiveness in reducing the hazard rate is subject to diminishing returns. It is shown how the investment schedule to maximize the expected net present value of the asset can be determined using the methods of deterministic optimal control, with the survival probability regarded as a state variable. The optimal investment pattern involves “bang-bang-singular” control. A numerical scheme for determining jointly the optimal investment policy and the optimal harvest (or replacement) age is outlined and a numerical example involving forest fire protection is given.     

财政支出、电力消费与农民收入的时空特征分析

本文将财政农业人均支出和农村人均用电量作为解释变量,农民人均纯收入作为被解释变量,利用2000-2005年中国31个省、市和自治区的有关时空数据,建立相应的空间自回归模型.模型数据统计分析表明:a)农民人均纯收入不仅存在空间自相关的特点,而且具有异质性;b)农民人均收入对财政农业人均支出、农村人均用电量存在明显的空间依赖性;c)用财政农业支出和农村用电量来反映农民收入水平十分有效,且都具有显著的正面影响.据此,文章提出了一些有针对性的提高农民收入的政策建议.     

Calculating risk neutral probabilities and optimal portfolio policies in a dynamic investment model with downside risk control

This paper presents a method for solving multiperiod investment models with downside risk control characterized by the portfolio’s worst outcome. The stochastic programming problem is decomposed into two subproblems: a nonlinear optimization model identifying the optimal terminal wealth distribution and a stochastic linear programming model replicating the identified optimal portfolio wealth. The replicating portfolio coincides with the optimal solution to the investor’s problem if the market is frictionless. The multiperiod stochastic linear programming model tests for the absence of arbitrage opportunities and its dual feasible solutions generate all risk neutral probability measures. When there are constraints such as liquidity or position requirements, the method yields approximate portfolio policies by minimizing the initial cost of the replication portfolio. A numerical example illustrates the difference between the replicating result and the optimal unconstrained portfolio.     

农民收入增长波动关系预测分析:基于小波变换

新农村建设背景下,保持农民收入快速、稳定增长对于构建社会主义和谐社会、不断缩小城乡差距具有重要的战略意义。本文运用小波变换(WT)对1976-2006年间农民收入的波动关系进行预测分析,实证检验结果显示:全国农民人均纯收入增长具有7年和40年左右的特征时间尺度,与农民人均纯收入变化存在着7年和40年两个主要周期振荡保持一致。两个特征时间尺度叠加,可以预见在未来的数年内,全国农民人均纯收入将呈现绝对值快速增长、增长率在波动中有所放缓的特征。最后,文章就如何保持农民收入稳定增长提出了点简短的对策建议。     

跳-扩散风险模型的最优投资策略和破产概率研究

对盈余投资于金融市场的跳-扩散风险模型的最优投资策略和破产概率进行了研究,得到最优投资策略和最小破产概率的显示解,发现破产概率满足Lundberg等式．最后通过数值计算,得到最小破产概率与无风险利率,投资和相关系数之间的关系,以及无风险利率和相关系数对最优投资策略的影响．     

人力资本存量计算方法的改进与试算

在Jorgenson和Fraumeni的理论框架下提出了一种计算人力资本存量的新方法,并且具体计算了我国2000年人力资本存量以及城乡人力资本存量.分析得出结论:我国人力资本总量巨大,而人均极少;城乡人均人力资本差距很大,且有进一步加大的趋势.