库存周期计算的价值方法和实物方法研究

研究比较了库存周期计算的价值方法和实践中常常使用的实物方法,并以钢铁制造企业的钢卷产品为例加以说明。     

Forecasting economic time series using flexible versus fixed specification and linear versus nonlinear econometric models

Nine macroeconomic variables are forecast in a real-time scenario using a variety of flexible specification, fixed specification, linear, and nonlinear econometric models. All models are allowed to evolve through time, and our analysis focuses on model selection and performance. In the context of real-time forecasts, flexible specification models (including linear autoregressive models with exogenous variables and nonlinear artificial neural networks) appear to offer a useful and viable alternative to less flexible fixed specification linear models for a subset of the economic variables which we examine, particularly at forecast horizons greater than 1-step ahead. We speculate that one reason for this result is that the economy is evolving (rather slowly) over time. This feature cannot easily be captured by fixed specification linear models, however, and manifests itself in the form of evolving coefficient estimates. We also provide additional evidence supporting the claim that models which ‘win’ based on one model selection criterion (say a squared error measure) do not necessarily win when an alternative selection criterion is used (say a confusion rate measure), thus highlighting the importance of the particular cost function which is used by forecasters and ‘end-users’ to evaluate their models. A wide variety of different model selection criteria and statistical tests are used to illustrate our findings.     

基于多元统计分析的封闭式基金业绩评价

本文引入在险价值(VaR)和基金折价率指标,利用因子分析和聚类分析方法对基金业绩进行综合评价。实证分析发现我国封闭式基金收益率优于市场收益率,少数几只基金业绩相对突出,实现低风险高收益的目标。但封闭式基金折价幅度较大,基金内部收益水平与外部评价状况背离,反映了市场投资者的投资非理性现象。     

基于汇率风险特征的对外物流企业汇率风险防范对策研究

从阐述汇率风险的特征出发，系统研究对外物流企业汇率风险防范的各种决策，并根据我国现有的外汇管理法律法规和金融市场的发育程度分析各种汇率风险决策的可操作性和约束条件。     

计件工资博弈中管理者的守诺与公平权衡——对计件工资制不流行的再解释

本文首先回顾总结了计件工资制度的发展过程和存在的问题,指出计件工资博弈陷入低效僵局的原因在于管理者的不履行事先的承诺。传统的解释是管理者事后抵挡不住自利的诱惑,本文认为管理者守诺还是不守诺是在权衡计件工资员工和计时工资员工激励效果后作出的理性的选择。管理者守诺只在一定的情形下发生所以计件工资制不流行。     

中国城市住宅市场的结构差异性分析

市场价商品房、经济适用住房和廉租房构成了目前中国城市住宅市场的供应体系.依据中国30个主要城市的房地产开发统计数据,选择吸纳率作为评价住宅市场供需均衡状态的指标,利用固定影响变截距模型,重点研究了商品房和经济适用住房供给结构的城市差异性.研究发现,在城市住宅市场中,经济适用住房市场和商品房市场具有很强的相关性.作为具有政府资助性质的经济适用住房建设,存在典型的地域性特征,其政策的设定和实施会对整个住宅市场产生影响,地方政府应在利用比较全面的住宅市场指标体系进行综合分析基础上,制定适合本地的经济适用住房政策.     

An improved empirical Bayes test for positive exponential families

We exhibit an empirical Bayes test δ^* _n for a decision problem using a linear error loss in a class of positive exponential families. This empirical Bayes test δ^* _n possesses the asymptotic optimality, and its associated regret converges to zero with rate n ⁻¹(ln n )⁶ This rate of convergence improves the previous results in the literature in the sense that a faster rate of convergence is achieved under much weaker conditions. Examples are presented to illustrate the performance of the empirical Bayes test δ^* _n     

Across-the-Curve Credit Spread Indices

We design a novel across-the-curve credit spread index, AXI, a measure of the recent cost of wholesale unsecured debt funding for publicly listed US bank holding companies and commercial banks. AXI, a benchmark for bank lending and risk management, is the weighted average of credit spreads for unsecured debt instruments with maturities ranging from overnight to five years, with weights that reflect both transaction and issuance volumes. We provide illustrative output of the bond-based component of AXI. By widening coverage to include all corporate debt issuers, we also build a financial conditions index (FXI).     

房产税税率、房产税收入与房地产税制度设计

基于房产税税率对房产税收入影响理论,运用数理模型,依据沪渝两市自然数据,考量房产税税率变化对房产税收入的影响.结果显示:房产税税率对房产税收入具有重要影响.若提高上海市房产税税率,房产税增收效果更明显;若下调重庆市房产税税率,房产税增收效应更显著.鉴于此,未来房地产税立法改革思路:一是坚持房地产税税负不增加;二是平衡好房地产税立法与其他收费制度的关系;三是统筹税制改革的协同推进;四是兼顾房地产税的地方财政属性;五是谨慎推进.同时,应遵循税收法定原则、地方财政原则、公平原则、确实原则、渐进原则和结构性调整原则.此外,在制度设计方面,纳税人的设计要体现财产税性质,征税范围要涵盖农村,课税对象要包括存量住房,税率要体现差异性,计税依据要由市场价格评估值确定,税收优惠要兼顾免税面积和特殊人群.     

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。