行政垄断加剧了企业生存风险吗?

在转型升级的关键阶段,定量地评价行政垄断与企业战略选择之间的关系,对推动《公平竞争审查制度》的理论与实践探索以及改善企业生存的制度环境都具有重要意义.但既有研究中,行政垄断的政策效应分析较少深入到微观企业层面,特别是从企业生存的视角来进行的评估.文章采用PSM-Cox比例风险模型,以企业微观数据首次检验了行政垄断对企业生存风险的影响效应及其机制.研究表明,行政垄断对制造业企业的生存风险产生了显著效应,即以行政垄断为代表的政府干预会加剧企业生存风险.同时,行政垄断对不同所有制、地区及行业的企业的影响存在异质性,会显著加剧非国有企业、中西部地区企业及劳动密集型行业企业的生存风险.而行政垄断对企业生产率、企业创新与寻租行为所产生的效应或许是本文总体结论的重要解释.     

省直管县财政体制条件下审计组织方式差异化研究--以甘肃省为例

通过省直管县财政体制改革以激发县域经济发展的活力,是国家推动现代化进程的必然选择,也是新时期解决“三农”问题的根本途径,同时还是解决我国客观存在的多级财政体制效率缺失问题的基本路径。鉴于此,审计部门如何转变工作思路和方法,如何揭示省直管县财政体制改革中出现的新矛盾、新问题,如何进一步改进、创新审计组织方式,发挥改革的助推器作用,是一个亟待解决的全新课题。本文在探讨省直管县财政体制改革以及在甘肃省现状分析的基础上,对新形势下审计服务省直管县财政体制改革与县域经济协同发展中面临的问题与挑战进行了实证分析,并进一步对省直管县财政体制条件下地方政府审计组织方式差异化进行了多方位的研究,以期为优化及改进审计组织方式提供路径选择。     

边界品位调整模型及应用研究

边界品位与矿产品价格密切相关.在确定了矿床最低边界品位调整模型的基础上,选择以铁矿为实例,通过选取参数及运算,认为我国铁矿资源露天开采的最低边界品位定在15%是比较合理的.与此同时,建议对铁品位在15%及以下的低品位铁矿资源露天开采实行优惠政策;对铁品位在15%以上的铁矿资源露天开采,在目前的经济技术条件下政策优惠不是主要的,但要注重政策引导.     

黑龙江省垦区林业绩效评价及发展对策

运用SPSS统计软件对衡量黑龙江垦区林业绩效的若干指标进行主成分分析。通过构建模型将反映林业状况的14项主要评价指标转化为评价林业绩效的4个主成分因素,并以此为依据对垦区9个分局2005年林业绩效进行排名。对排名结果进行了综合分析之后,针对黑龙江垦区各区域林业的发展现状和存在的问题,提出了深化垦区林业体制改革,转化林业科技成果和实施“优化升级工程“等发展对策建议。     

跨境网购中的消费者反馈信息和信任相关因素研究

随着在国外网站购物的消费者数量的增加,跨境电子商务的发展已极具潜力。本文针对"跨境网购意愿"的影响因素展开调查,建立了一个基于信任和风险的消费者行为模型;本文针对模拟的三个反馈场景,调研了912个样本,重点检验了"来自不同国家消费者的信息反馈对上述因素之间相关性的影响"。研究结果表明,在跨境网购时,"风险"和"信任"对购买意愿有影响,但二者受消费者反馈信息的影响相对较小,而其他因素间的相关性则会受到样本组间差异的影响,比如,在含反馈信息的样本组中,对电子商务的"普遍信任"会显著影响消费者对某一具体境外购物网站的信任。     

一种机载三维音频技术的快速计算方法

针对机载三维音频应用的实时性需求,提出了一种基于单耳相对头相关传递函数和改进型混响模型的机载三维音频快速实现方法,在较传统实现方式性能无明显下降的情况下降低了80%的计算量。对提出的算法在F-16战斗机模拟强噪声环境下进行相关主观试听实验,同时在某型飞机音频系统中实验验证。实验结果表明,所提方法在实时处理3路三维音频时,三维音频方位分辨精度在5°以内,可满足实际机载平台使用需求。     

Supply chain integration and operational performance: The contingency effects of production systems

The boundary conditions of supply chain integration (SCI) have been widely studied in order to find out when SCI is applicable and effective. However, prior studies have mainly focused on external contextual factors, such as supply complexity, environmental uncertainty and country-level infrastructure. This study contributes to the SCI literature by examining the contingency effects of internal production systems on the relationship between supplier integration, customer integration and operational performance. Based on organizational information processing theory, we provide evidence to show that the impact of supplier and customer integration on operational performance varies across production systems, such as one-of-a-kind production, batch production and mass production systems. The empirical results also reveal how supplier and customer integration can be matched with different configurations of production systems in order to achieve the desired quality, flexibility, delivery or cost performance.     

Improving forecasting performance using covariate-dependent copula models

Copulas provide an attractive approach to the construction of multivariate distributions with flexible marginal distributions and different forms of dependences. Of particular importance in many areas is the possibility of forecasting the tail-dependences explicitly. Most of the available approaches are only able to estimate tail-dependences and correlations via nuisance parameters, and cannot be used for either interpretation or forecasting. We propose a general Bayesian approach for modeling and forecasting tail-dependences and correlations as explicit functions of covariates, with the aim of improving the copula forecasting performance. The proposed covariate-dependent copula model also allows for Bayesian variable selection from among the covariates of the marginal models, as well as the copula density. The copulas that we study include the Joe-Clayton copula, the Clayton copula, the Gumbel copula and the Student’s $t$-copula. Posterior inference is carried out using an efficient MCMC simulation method. Our approach is applied to both simulated data and the S&P 100 and S&P 600 stock indices. The forecasting performance of the proposed approach is compared with those of other modeling strategies based on log predictive scores. A value-at-risk evaluation is also performed for the model comparisons.     

The effect of travel purpose and self-image congruency on preference toward airline livery design and perceived service quality

This paper examines travelers’ preference for airline livery design, which is an important component of sensory experience for tourists. Based on surveys of both U.S. and South Korean respondents, this study finds that airline livery preference depends on travel purpose (i.e. business vs. vacation). Designs preferred by the two travel segments differ in terms of color tone, hue, line, and shape. Business traveler-preferred designs signal punctual, efficient, classy, and safe service; while vacation traveler-preferred designs elicit feelings of fun, friendly, and exotic service. It is also shown that travelers prefer airline livery that is congruent with their situational self-image, depending on the travel occasion at hand. In fact, self-image congruency of design is approximately half of the variance in airline livery preference. Finally, results show that self-image congruency also increases perceived service quality.     

新加坡公共住房所有权及其资产构建效果评析

通过公共住房所有权来实现资产构建以推动社会发展是新加坡社会治理的重要特征。公共住房所有权发展使新加坡成为世界上住房所有权比率最高的国家。公共住房所有权是否有助于金融资产构建还是值得商榷的。公共住房所有权的实施使居民拥有了更大面积的HDB组屋进而改善了住房条件,提高了新加坡居民的健康状况。新加坡公共住房所有权促进了社会资产构建。新加坡公共住房所有权在资产构建方面依然存在一些挑战。需要在更深层次上对资产基础的社会政策进行全面考察。