股票期权制度在我国的实践性探讨

股票期权制度是 2 0世纪 70年代末期在美国兴起的一种薪酬制度 ,实践证明 ,它是一种合理而且成功的薪酬制度。但它的实际运用需要一定的条件和环境 ,就我国公司目前的现状而言 ,实施股票期权制度还存在诸多问题 ,故只能采取先在上市公司中试点 ,逐步放开的策略     

国有上市公司实施经理股票期权的障碍及对策分析

目前,许多国有上市公司为激励经理人而采用了源于西方国家的股票期权计划,本文从市场、法律及其自身的角度对该项激励制度在中国实践中遇到的障碍作了分析,并提出有效的对策建议。     

我国实施股票期权制度的障碍及对策研究

股票期权制度的出现 ,是现代经济发展的必然产物 ,有着深刻的经济理论与实践背景。代理理论是股票期权制度的前提 ,人力资本产权理论是股票期权制度的核心。企业实施股票期权制度 ,必须设计一个完整可行的股票期权计划 ,但是我国目前存在着一些实施股票期权制度的障碍 ,本文就实施股票期权的主要障碍提出一些对策建议     

Loss functions for estimation of extrema with an application to disease mapping

It is often of interest to find the maximum or near maxima among a set of vector‐valued parameters in a statistical model; in the case of disease mapping, for example, these correspond to relative‐risk “hotspots” where public‐health intervention may be needed. The general problem is one of estimating nonlinear functions of the ensemble of relative risks, but biased estimates result if posterior means are simply substituted into these nonlinear functions. The authors obtain better estimates of extrema from a new, weighted ranks squared error loss function. The derivation of these Bayes estimators assumes a hidden‐Markov random‐field model for relative risks, and their behaviour is illustrated with real and simulated data.     

论绿色消费方式的形成

绿色消费是可持续发展的消费方式,它的形成对人类可持续发展具有重要意义。论文主张从建立可持续发展的消费价值观,建立合理的财富分配秩序,调整经济结构和生产方式,并依靠科技进步和发挥政府的主导作用来促进绿色消费的形成。     

基于EGARCH模型的我国股市信息对称性研究

利用过去17年我国上证综合指数的历史数据,根据股票市场大的波动周期分五阶段经过EGARCH(1,1)模型估计,以验证市场对信息冲出的反映情况.研究结果表明:中国股市存在很大的波动性,尚未达到弱有效性;存在正负杠杆效应交替出现的现象,表现出信息不对称性,但是这种不对称性在明显减小.     

On Rates of Convergence for Bayesian Density Estimation

Abstract.  We consider the problem of estimating a compactly supported density taking a Bayesian nonparametric approach. We define a Dirichlet mixture prior that, while selecting piecewise constant densities, has full support on the Hellinger metric space of all commonly dominated probability measures on a known bounded interval. We derive pointwise rates of convergence for the posterior expected density by studying the speed at which the posterior mass accumulates on shrinking Hellinger neighbourhoods of the sampling density. If the data are sampled from a strictly positive, α -Hölderian density, with α  ∈ ( 0,1] , then the optimal convergence rate n^{− α / (2 α +1)} is obtained up to a logarithmic factor. Smoothing histograms by polygons, a continuous piecewise linear estimator is obtained that for twice continuously differentiable, strictly positive densities satisfying boundary conditions attains a rate comparable up to a logarithmic factor to the convergence rate n ^−4/5 for integrated mean squared error of kernel type density estimators.     

知识管理在现代企业中的应用浅析

针对知识管理在现代企业中的应用现状及未来趋势进行了论述,包括对知识管理的认识、实施过程的分析和管理机制的探讨.知识管理作为一项持续的管理过程,涵盖了业务流程、软件技术系统和企业文化,是一项复杂的系统工程.文章重点论述了现代企业中的知识管理体系的构建.     

论中国证券市场监管低效的制度性因素

分析了作为政府强制性的制度安排,中国证券市场在发展过程中产生的市场不规范问题,认为证券市场监管制度的低效运行是问题产生的主要原因。而监管困境的背后则是制度的缺陷,主要表现为两个方面:一是监管当局政策目标与监管目标的冲突;二是以个人和企业信用为核心的信用管理体系的缺失。     

A note on LeCam’s bound for the distance between the Poisson binomial and the Poisson distribution

n possibly different success probabilities p ₁, p ₂, ..., p _n is frequently approximated by a Poisson distribution with parameter λ = p ₁ + p ₂ + ... + p _n . LeCam's bound p ² ₁ + p ² ₂ + ... + p _n ² for the total variation distance between both distributions is particularly useful provided the success probabilities are small. The paper presents an improved version of LeCam's bound if a generalized d-dimensional Poisson binomial distribution is to be approximated by a compound Poisson distribution. Received: May 10, 2000; revised version: January 15, 2001