A two-stage stratified Warner’s randomized response model using optimal allocation

This paper applies Kim and Wardes (2004) stratified Warners randomized response model to Mangat and Singhs (1990) two-stage randomized response model. The proposed stratified randomized response model has an optimal allocation and a large gain in precision. Hence, the estimator based on the proposed method is more efficient than Kim and Wardes (2004) and Mangat and Singhs (1990) estimators under the conditions presented in both the case of completely truthful reporting and that of not completely truthful reporting by the respondents.     

煤炭资源型城市聚集经济与城市化水平研究

运用可变权系数综合评价模型对2002年中国煤炭资源型城市城市化水平进行测度;基于1999～2002年度煤炭城市面板数据,应用随机效应模型估计煤炭城市聚集经济水平;结果表明,我国煤炭城市城市空间经济结构效率和其城市化水平并不具有正相关性,许多城市化水平相对较高的煤炭城市的聚集经济较差,并没有显示出城市化经济的优势.     

2005年人民币汇率制度改革效应实证分析

本文发现，迄今为止人民币汇率的走势实际上是一个有“突变”现象的“随机游走”过程，这种“突变”可以解释为在严格外汇管制条件下人民币长期积聚的升值压力的一次释放；特别地，2005年7月21日的汇率改革是卓有成效的，它通过加快进口增长和减缓出口增长弱化了人民币进一步升值的压力。文章进而指出，在有效监控投机资金和预防投机冲击的国内机制建立之前，“爬行式钉住汇率”是我国当前汇率政策的最佳选择，而不是简单地放宽人民币对美元汇率的浮动范围。     

秦岭北麓森林公园生态旅游绿色营销策略研究

秦岭北麓是陕西省的生态安全屏障和水资源涵养地。当地森林公园开发过程中，由于行政管理者与开发权利主体错位以及盲目开发旅游项目等，导致生态环境破坏严重。秦岭北麓森林公园应采用绿色营销策略，包括采用绿色文化策略、绿色价格策略以及绿色产品等策略，开发生态旅游项目，形成当地经济效益、生态环境利益和旅游者需求三者的统一，实现当地旅游业的可持续发展。     

钢结构随机有限元动力分析

钢结构在应用一段时间后,物理参数和几何参数的变化将导致结构参数发生某些不确定性的改变, 这将会影响结构的力学特性.从此问题出发,通过一个算例详细阐述了用摄动随机有限元法解决此类问题的实现过程.     

Model selection in random effects models for directed graphs using approximated Bayes factors

With the development of an MCMC algorithm, Bayesian model selection for the p ₂ model for directed graphs has become possible. This paper presents an empirical exploration in using approximate Bayes factors for model selection. For a social network of Dutch secondary school pupils from different ethnic backgrounds it is investigated whether pupils report that they receive more emotional support from within their own ethnic group. Approximated Bayes factors seem to work, but considerable margins of error have to be reckoned with.     

注册会计师行业监管的若干问题研究

针对我国对舞弊的会计师事务所处罚力度明显不够的事实，监管机构应加大处罚力度，在确定合理处罚的基础上选择适当的监管力度，政府监管力度按成本效益原则确定监管费用的最优投入，决定监管机构的规模和大小，并完善相关的机构建设。     

Valuation of commodity derivatives in a new multi-factor model

This paper extends existing commodity valuation models to allow for stochastic volatility and simultaneous jumps in the spot price and spot volatility. Closed-form valuation formulas for forwards, futures, futures options, geometric Asian options and commodity-linked bonds are obtained using the Heston (1993) and Bakshi and Madan (2000) methodology. Stochastic volatility and jumps do not affect the futures price at a given point in time. However, numerical examples indicate that they play important roles in pricing options on futures. This revised version was published online in June 2006 with corrections to the Cover Date.     

股票价格均值回归理论研究综述

随机漫步理论认为股票的价格是不能预测的,许多实证检验的结果也支持了这一结论。但是,近年来均值回归理论对随机漫步理论提出了挑战。从长期来看,股票价格呈均值回归是必然的;均值回归具有不对称性;政府行为对股票的均值回归具有一定的影响。