生产性服务业的发展模式

生产性服务业是21世纪发展最快的行业,其增长潜力大,产业关联度高,对产业结构优化、价值链层级提升和整体经济竞争力水平的提高具有举足轻重的作用。从产业角度来看,生产性服务业经历从制造业中分离、独立发展、与制造业互动融合三个阶段;从价值链角度分析,在生产性服务业发展的三个阶段分别服务于制造业的上下游、核心环节以及生产性过程中;从行业角度来看,初级阶段以人力服务、物流服务为主,中级阶段以资本服务为主,高级阶段以信息技术和知识技术服务为主。     

基于EM-NB算法的网络调查缺失数据处理方法

将最大期望值算法(EM)与朴素贝叶斯算法(NB)相结合,提出EM-NB算法来填补网络调查中的缺失数据。对比基于处理后的完备数据集的分类统计结果与基于纸质调查得到的分析结果,结果显示,利用EM-NB算法处理缺失数据后的网络调查问卷与纸质调查问卷可得到一致的调查结果。这表明EM-NB算法是一种有效的处理网络调查中缺失数据的方法。     

地方政府税收竞争对产能过剩的影响

使用2001—2011年我国省际面板数据,测算了我国30个省(自治区、直辖市)的产能过剩程度,进一步实证检验了地方政府的税收竞争对产能过剩的影响。结果表明:产能过剩主要出现在重工业领域;地方政府的税收竞争加剧了重工业的产能过剩程度,其中增值税竞争的影响大于总税收竞争和企业所得税竞争的影响,地方政府税收竞争的滞后影响大于当期影响;在中、西部地区,地方政府的税收竞争对重工业产能过剩的影响更为显著。指出:减弱地方政府的税收竞争有利于缓解我国产能过剩问题。     

Effects of the matching fund program on IPO and bankruptcy of SMEs in Korea

Most small and medium enterprises (SMEs) in Korea struggle in financing R&D. Thus, the Korea Core Industrial Technology Investment Association (KITIA) was established to implement a matching fund program (MFP) to help SMEs with this undertaking. Applicant firms to the MFP are reviewed first based on their technology levels and are required to attract financing from venture capitalists (VCs), before receiving funds from the MFP. This paper, based on KITIAs MFP applicant data from 2001 to 2004, evaluates the performance of the MFP in terms of the success rate of funded SMEs’ initial public offerings (IPOs) and bankruptcy rates in relation to those SMEs that could not attract matching funds. Propensity score matching was used to eliminate selection bias from the data in order to assess the actual treatment effect of the MFP. According to the result of logistic regression applied to the matched data, MFP apparently did not have significant effects on IPO success and bankruptcy. This implies that MFP needs to allow VCs more time to evaluate SMEs covering qualitative aspects as well. It is expected that this change of structure can provide better performance of MFP in terms of IPO success and bankruptcy of matched SMEs.     

Electronic word-of-mouth (eWOM) generation in new media platforms: The role of regulatory focus and collective dissonance

In this research, we examine the role of two motivational forces associated with creation of electronic word-of-mouth (eWOM): regulatory focus and collective dissonance. Our studies show that generation of eWOM is enhanced by regulatory fit, while traditional WOM is dominated by the negativity effect. In study 1A, we show that prevention-focused consumers produce stronger intentions to post eWOM when they undergo a negative compared to a positive service experience. In study 1B, we find that promotion-focused consumers are more likely to post eWOM in reaction to a positive service experience when one's self-construal is independent. The final study shows that due to collective dissonance, consumers have greater intentions to create eWOM when their experiences are inconsistent with others' postings. We discuss the implications of these results for the development and management of eWOM communication in virtual communities.     

遏制现阶段中国粮食浪费措施的有效性分析

“民以食为天”,粮食安全问题一直是人们关注的焦点。随着人们经济水平的提升和生活质量的提高,餐饮消费日趋火爆,但在餐饮业繁盛的背后是让人痛心的浪费现象。据测算,我国粮食产后仅储藏、运输、加工等环节损失浪费总量达1224．3亿公斤,围绕这一问题,本文分析了我国粮食的基本现状,探讨了我国粮食浪费的主要类型,提出了加大节约粮食的立法力度;强化宣传教育活动;引导消费者摆正消费心态;多环节控制粮食浪费与损失。等遏制粮食浪费的对策。     

多径衰落信道MPSK信号超指数迭代盲解调算法

为了提高多径衰落信道下的盲解调性能,提出了一种结构简单的MPSK信号盲解调算法。首先利用超指数迭代分数间隔盲均衡器实现联合定时同步与均衡,然后对均衡器输出信号进行非线性变换实现载波频偏的估计,最后利用二阶数字判决锁相环跟踪相位变化纠正剩余频偏和相偏。仿真结果表明,在多径衰落信道条件下,与现有算法相比,基于超指数迭代分数间隔盲均衡器的盲解调算法实现简单,误码率低,而且具有收敛速度快、性能稳定等优点。     

农户信用信息评价指标的设计及优化

农户信用信息评价指标体系是农村信用体系建设的核心内容.为优化金融生态环境,推动农村经济的发展,从优化农户信用信息指标入手,以模糊层次分析法为主要分析工具,结合天水市某农户的实践案例进行分析,结果表明信用村农户的信用评价结果明显优于非信用村农户.因此,应加强农村征信知识的培训和宣传,切实履行信息告知义务,继续完善农户信用评价指标体系建设,加大对信用评价工作的政策支持,优化农村信用评价工作.     

中国寿险公司多元化经营的风险分析

选取新华、国寿、太平、泰康、平安等五家寿险集团公司从2001~2011年每年绩效指标中总资产收益率和净资产收益率的标准差作为度量公司风险的指标,将五家公司的业务线熵指数的均值作为多元化经营的指标进行实证分析。结果表明:多元化经营与寿险公司总资产收益率、净资产收益率的标准差之间存在一定的非线性关系,即多元化经营在一定范围内可以降低ROA和ROE的波动性,但在一定范围内又可能会增大这种波动性。     

地区产业结构、能源消费与经济增长关系研究

为了探讨地区经济增长与产业结构、能源消费的关系,本文以广东顺德2005—2012年数据为例,利用灰色关联模型对三者进行动态关联分析。结果表明,能源消费总量的快速增长是导致顺德经济增长的主要原因,其次是第二产业占国民经济比值。因此,要加快地区经济的发展,必须率先从改善能源利用效率和调整产业升级开始,大力发展绿色经济,形成合理的能源消费结构,加大可再生能源的开发力度。