Sample Design and Allocation for Random Digit Dialling

Sample design and sample allocation methods are developed for random digit dialling in household telephone surveys. The proposed method is based on a two-way stratification of telephone numbers. A weighted probability proportional to size sample allocation technique is used, with auxiliary variables about the telephone coverage rates, within local telephone exchanges of each substrata. This makes the sampling design nearly “self-weighting” in residential numbers when the prior information is well assigned. A computer program generates random numbers for the local areas within the existing phone capacities. A simulation study has shown greater sample allocation gain by the weighted probabilities proportional to size measures over other sample allocation methods. The amount of dialling required to obtain the sample is less than for proportional allocation. A decrease is also observed on the gain in sample allocation for some methods through the increasing sample sizes.     

Preventing HIV in injection drug users: exploring the tradeoffs between interventions

Injection drug users (IDUs) transmit the human immunodeficiency virus (HIV) via both needle sharing and sex. Available interventions for this population have varying costs and effectiveness and focus on different risk behaviors. In this analysis, we look at two interventions. One is inexpensive, broad-based and provides modest risk reductions (street outreach (SO)); the other is narrowly focused, expensive and relatively effective (methadone maintenance). This analysis explores the effects of population risk behavior, intervention effectiveness, intervention costs, and decision constraints when allocating funds between these two interventions to maximize effectiveness. We develop a model of the spread of HIV, dividing IDUs into susceptibles (uninfected) and infectives, and separately portraying sex and injection risk. We simulate the epidemic in New York City for time periods from the mid-1980s to the early 1990s, and incorporate the behavioral effects of two interventions performed singly or in combination to find the allocation that maximizes the number of infections averted in the IDUs and their noninjecting sex partners, assuming interventions have increasing marginal costs. We find that the optimal allocation nearly always involves spending the maximum allowable amount on SO. This result is largely insensitive to variations in risk parameters, intervention efficacy, or cost. The model's structure, however, makes clear that many factors contribute to this insensitivity, namely the scope of the interventions, the dual drug/sex nature of HIV risk in the population, the asymmetry of sexual risk for men and women, and the potential benefits to nonIDUs.     

Distribution-free tests for comparing several treatments with a control

Abstract  In this paper we propose distribution-free treatments versus control tests for the one- and two-way classifications. The null distribution properties are shown to be equivalent to those of well-known statistics for which critical values have been extensively tabled. Asymptotic relative efficiencies with respect to corresponding normal theory competitors are derived and optimal designs for the allocation of experimental units to the treatments and control are obtained.     

中美证券公司资本配置差异分析

中国证券行业发展速度很快,但是效益普遍不好,亏损面很大,除外部环境制约外,内部资本运营水平不高仍是关键因素.本文选择有代表性的美国若干证券公司,解析其资产负债结构、收入结构等资本配置和运营形式,从而为我国证券公司找到差距和提供可借鉴之处,以改善中国证券行业经营状况,增强其抵抗与日俱增的各种风险之能力.     

基于价值工程的项目团队人员配置的构件化管理

根据软件工程中软件开发模块构件化与项目管理中项目职能分解的相似性,把构件化方法引入到项目团队人员配置中,按照项目职能的构件并灌以价值最大化的思想来进行项目团队人员的选择方面的应用,并为企业建立项目人员配置构件化的管理体系,来实现满足人力配置需要,降低费用,长期改进发展的目的。     

Financial reporting consequences of natural disasters: Evidence from the impact of resource constraints at audit offices on non-affected clients

Disaster-affected clients demand significant additional effort from their audit office, and hence strain the audit office’s resources available to other non-disaster-affected clients. We consider audit offices with disaster-affected clients to be strained offices and find that, compared with clients audited by non-strained audit offices, non-disaster-affected clients audited by strained audit offices are more likely to have their financial statements restated. This result suggests the financial reporting quality of companies not directly exposed to disasters could also be negatively affected by the disasters, due to their auditors’ strained-resource issue. We further find such a negative effect is more pronounced when the degree of resource constraints is greater and when the audit office lacks client experience or industry expertise. We offer novel evidence of financial reporting consequences of natural disasters, focusing on the externality of disasters on companies not directly affected by disasters. The findings have important implications for regulators in making disaster-related policies, for auditors in managing their client portfolios, and for companies in making auditor choice decisions.     

旅行社产业链条中的利益分配机制研究

旅游客源地与旅游目的地旅行社经营业绩存在显著差异,旅游客源地旅行社经营绩效优于目的地旅行社经营绩效,旅行社产业链条中存在利益分配不平等现象。本文首先建立模型论证这种旅行社产业链条中利益分配不平是由旅行社产业链条中不同环节的市场结构不同引起的;接着指明旅行社产业链条中不同环节之所以市场结构不同,关键是不同环节的规模经济、进入壁垒、要素需求等不同,导致旅行社产业链条中的下游环节往往处于利润高端,上游环节往往利润微薄,甚至亏损;最后根据旅行社产业链条中这种利益分配状况提出了改善我国旅行社经营绩效的具体政策建议。     

我国工业行业信贷资金配置效率研究

效率是资源配置的核心问题,评价资源配置效率高低的重要标准是分析资源是否流向有价值创造能力的行业.借鉴Jeffrey Wurgler(2000)及经济增加值(EVA)方法,对2002-2005年我国金融机构信贷资金在36个工业行业的配置效率进行实证分析.研究发现,信贷资金配置效率与我国工业行业价值创造能力总体上呈现出较低相关性,配置效率较差.提出了加强行业运行机制的研究,加强产业政策和信贷政策的协调配合等政策建议.     

区域金融生态对金融资源配置的影响

区域金融生态对金融资源配置有很大的影响,一个地区金融资源的多少与该地区的金融生态密切相关.区域经济的快速发展将增加该区域对金融资源的需求,有利于改善该区域的金融生态环境;改善区域金融生态环境有利于吸引金融资源,从而推动区域经济的发展.区域金融资源配置要兼顾效益与公平原则.区域金融资源配置受到区域金融生态的硬约束.为提高区域金融资源的配置效率,应采取改善区域金融生态环境与推动区域经济发展并重的策略.     

非对称信息下商业银行资本配置研究——基于PCA理论模型分析

资本配置是银行风险管理的核心,是决定银行竞争力的重要因素.经典的资本配置理论均以信息在银行内部各机构完全对称作为基本假设,忽略了总分行问的委托代理关系.鉴于此,本文借鉴PCA模型,在商业银行内部构建一套资本配置的优化机制,以提高银行资本配置的有效性.