品种结构变动对统计指标影响的分析

本论文通过实例分析说明了在前提条件具备的情况下 ,品种结构的变动 ,不一定会使生产费用必然变动 ,对其他统计指标如利润额 ,成本降低额的影响也是如此。即品种结构的变动 ,对统计指标发生影响不是必然的。     

关于两部定价的理论研究

通过存在两类消费者情况下的两部定价模型推导出了最优两部定价公式。表明最优边际价格由各类消费者的偏好差异程度及边际生产成本决定，而固定费用主要取决于对商品具有较低效用评价的消费者的需求，并推导了固定费与需求弹性的关系以及最优边际价格的范围。     

Tests for Coefficients in High‐dimensional Additive Hazard Models

We consider hypothesis testing problems for low‐dimensional coefficients in a high dimensional additive hazard model. A variance reduced partial profiling estimator (VRPPE) is proposed and its asymptotic normality is established, which enables us to test the significance of each single coefficient when the data dimension is much larger than the sample size. Based on the p‐values obtained from the proposed test statistics, we then apply a multiple testing procedure to identify significant coefficients and show that the false discovery rate can be controlled at the desired level. The proposed method is also extended to testing a low‐dimensional sub‐vector of coefficients. The finite sample performance of the proposed testing procedure is evaluated by simulation studies. We also apply it to two real data sets, with one focusing on testing low‐dimensional coefficients and the other focusing on identifying significant coefficients through the proposed multiple testing procedure.     

西部大开发与民族高等教育的发展问题

西部大开发是我国面向21世纪作出的重大战略决策。本文分析了西部地区民族高等教育在现代市场经济和知识经济条件下实施的西部大开发中面临的发展机遇与挑战,认为西部大开发和西部地区民族高等教育应该相互促进和协调发展,并根据实施西部大开发的基础、根本、关键和重要条件,提出了发展民族高等教育的一些对策和建议。     

我国未来住房价格走势分析

进入2014年以来,房价下跌的舆论越来越趋于一致,不同点在于房价跌的时间、区域以及程度。通过理性分析,房价与GDP的关系、房价与货币供应量M2的关系以及非理性分析,反馈结构化因素、城市信仰、心理等因素分析,得出结论:我国房价的上涨或下跌都受到阻力,因此未来房价将不会出现大跌或大涨。     

信息?噪音?泡沫?--现代金融学前沿问题综论

30多年来,关于证券市场信息效率的研究一直是现代金融学的焦点问题.有效市场假说从理性行为出发,得出证券价格总是可以充分反映可获得的信息,其价格等于其"内在价值",即预期未来现金流的折现价值.然而,从上个世纪80年代开始,这一假说受到了空前的质疑,首先是来自噪音学派关于交易成本的批评,随后是来自行为金融学关于有限套利和噪音交易等更为严厉的质疑.90年代末关于证券市场价格泡沫的研究又成为现代金融学备受关注的热门话题.     

Sorting and Decentralized Price Competition

We investigate the role of search frictions in markets with price competition and how it leads to sorting of heterogeneous agents. There are two aspects of value creation: the match value when two agents actually trade and the probability of trading governed by the search technology. We show that positive assortative matching obtains when complementarities in the former outweigh complementarities in the latter. This happens if and only if the match‐value function is root‐supermodular, that is, its nth root is supermodular, where n reflects the elasticity of substitution of the search technology. This condition is weaker than the condition required for positive assortative matching in markets with random search.     

On the Benefits of Risk Pooling in Inventory Management

We analyze the benefits of inventory pooling in a multi‐location newsvendor framework. Using a number of common demand distributions, as well as the distribution‐free approximation, we compare the centralized (pooled) system with the decentralized (non‐pooled) system. We investigate the sensitivity of the absolute and relative reduction in costs to the variability of demand and to the number of locations (facilities) being pooled. We show that for the distributions considered, the absolute benefit of risk pooling increases with variability, and the relative benefit stays fairly constant, as long as the coefficient of variation of demand stays in the low range. However, under high‐variability conditions, both measures decrease to zero as the demand variability is increased. We show, through analytical results and computational experiments, that these effects are due to the different operating regimes exhibited by the system under different levels of variability: as the variability is increased, the system switches from the normal operation to the effective and then complete shutdown regimes; the decrease in the benefits of risk pooling is associated with the two latter stages. The centralization allows the system to remain in the normal operation regime under higher levels of variability compared to the decentralized system.     

市盈率指标及其相关问题研究——关于市盈率问题的若干研究(上)

本文借助于数量化方法,探讨了在中国股市及其投资的几个重要方面(如价值评估、投资分析、决策及回报等)中,使用市盈率指标的一些问题。本文是"关于市盈率问题的若干研究"的上半部。     

Manufacturer suggested retail prices,loss aversion and competition

We study a model of vertical relations with imperfect retail competition in which a fraction of the consumers display reference-dependent demand with respect to the manufacturer’s suggested retail price. We demonstrate that in equilibrium the suggestion will either be undercut or complied with by the retailers, but never surpassed: undercutting occurs if competition is fierce, the impact from consumers affected by reference-dependent preferences is significant, and high price suggestions are credible; compliance occurs otherwise. We provide comparisons, and discuss implications, for consumer surplus for the scenarios with suggested retail prices, without vertical restraints and with resale price maintenance.