中国高端装备制造业自主技术创新效率稳定性及影响因素研究

在全面实施创新驱动发展战略的时代背景下，揭示中国高端装备制造业自主技术创新效率稳定性，测度相关因素的影响强度与方向，对揭示中国高端装备制造业自主技术创新规律，制定其发展策略具有重要指导意义。聚焦中国高端装备制造业自主技术创新效率稳定性及影响因素，采用DEA-Malmquist指数方法和Tobit回归模型进行实证研究，结果表明，中国高端装备制造业自主技术创新效率存在一定波动性，且各细分行业技术创新效率内部稳定性较差，产业自主技术创新效率整体稳定性不高；自主技术创新投入因素和环境影响因素对产业自主技术创新效率的影响具有较高的异质性，其中创新资金投入和人力资源投入对自主技术创新综合效率、纯技术效率及规模效率具有正向影响，而新产品开发投入和企业规模对自主技术创新综合效率、纯技术效率和规模效率的影响具有异质性，政策因素与市场因素分别具有显著和非显著负向影响，外源性创新因素具有显著正向影响，且影响强度较大。在此基础上，提出调整政府对高端装备制造业创新支持模式、加强外源性创新与智力引进等策略建议。     

On Testing for the Nullity of Some Skewness Coefficients

Three tests for the skewness of an unknown distribution are derived for iid data. They are based on suitable normalization of estimators of some usual skewness coefficients. Their asymptotic null distributions are derived. The tests are next shown to be consistent and their power under some sequences of local alternatives is investigated. Their finite sample properties are also studied through a simulation experiment, and compared to those of the √ b ₂-test.     

我国发展对外直接投资的必要性

随着我国经济的快速发展和综合国力的显著增强，我国企业实施走出去战略。扩大对外直接投资是其必然的战略选择。本文运用发展中国家对外直接投资理论。对我国开展对外直接投资的必要性进行了分析研究，认为市场竞争、资源不足以及产业结构升级等是促使我国企业进行对外直接投资的主要动因，并对这些动因进行了实证分析和检验。     

What lies beneath—Negative interest rates and bank lending

We study the transmission of negative interest rates to bank lending around an unexpected policy rate cut into deep negative territory by the Swiss National Bank (−0.75%). We exploit a rich data set on transaction-level corporate loans matched with bank balance sheet data. We find that banks more affected by negative interest rates offer looser lending terms and lend more than other banks. This result is consistent with the risk-taking channel, where a lower policy rate spurs bank risk-taking to maintain profits. The result implies that, even in such deep negative territory, the reversal rate has not yet been hit.     

天津市城市基础设施需求弹性测度研究

通过对相关文献和城市基础设施投资决策的政绩、寻租、效率以及需求导向进行分析,并利用修正的鲍莫尔模型,可为分析居民需求弹性对基础设施投资倾向的影响提供了一个微观的理论框架。结合天津市基础设施建设的实证分析,从经济性基础设施和社会性基础设施两方面,探讨基础设施需求弹性反映出的结构差异。     

中国区域经济发展差异及其原因的多尺度分析

本文采用经验模态方法对中国1953—2002年区域经济发展差异进行多尺度分析,并对不同尺度的区域经济差异的原因进行探讨。研究表明,50年来中国区域经济差异波动主要以60年尺度、17.5年尺度和趋势为主,近期区域差异呈扩大趋势。从不同尺度生产要素投入差异和区域差异的关系看,要素投入差异会引起区域差异,区域差异也会引起要素投入环境差异并引发要素投入差异的变化,在制定区域政策时应考虑区域差距波动的短期性和长期性。     

上市公司自愿性披露信息影响因素研究——基于沪、深上市公司的实证检验

本文在文献综述和理论研究的基础上,运用多元回归建立模型,对上市公司自愿性披露信息影响因子进行了实证分析。结果发现,上市公司自愿性披露信息与盈利能力、发行股票类型、会计师事务所规模、公司规模和资产负债率等因素成显著正相关,而与股权集中度及行业类型没有显著相关关系,并对结论进行了相关分析。     

Using replication research for just-in-time purchasing construct development

Using replication research, the validity of the just-in-time purchasing (JITP) construct is established. Although empirical researchers have examined JITP over the last two decades, a consistent set of valid, reliable factors has not been used. The lack of valid construct is a barrier to hypotheses testing and meta-analyses on JITP. This study confirmed the validity of six JITP factors: top management commitment, employee relations, training, supplier quality management, transportation, and quantities delivered using two different data sets and testing the first- and second-order structure of the JITP construct. Content validity, reliability, unidimensionality, convergent validity, discriminant validity, criterion-related validity, and an invariant factorial structure of the JITP construct were empirically established.     

Linking performance drivers in production planning and inventory control to process choice

This study investigates how process choice relates to production planning and inventory control decisions. We empirically examine the validity of deductively derived patterns about these types of decisions. More importantly, we look for normative insights by exploring how production planning and inventory control decisions affect operations performance. Our findings show that production line and continuous flow plants use more of a level production strategy, and carry less raw material and work-in-process inventory. The performance drivers for these plants, through which the operations function excels, are effective utilization of equipment, reduced finished goods inventory, and reduced setup down time. To gain forward demand visibility and batching economies, job and batch shops rely much more on backlogs in their planning process. These plants use more of a production chase strategy and position inventory lower in the bills of materials. Four performance drivers for top-performing job and batch shops are to find ways that better anticipate customers' orders, have a more responsive chase strategy, carry less raw material or purchased inventory, and shorten production planning horizon, partly through less reliance on backlogs. It is intriguing that top-performing plants not only do the expected things, given their choice of process, but also excel in selected dimensions—some of which fit the profile normally associated with a different process choice. To monitor and continuously improve operations, evaluation ‘scorecards’ should pay particular attention to performance drivers, which change depending on the plant's process choice.     

计量经济学的地位、作用和局限

目前,计量经济学和微观经济学与宏观经济学一起构成了中国高校经济管理类本科生和研究生必修的三门经济学核心理论课程。计量经济学在中国经济学界受到越来越广泛的关注,其方法与工具也在实证研究中被大量应用。本文将阐述现代计量经济学的基本思想和方法论,计量经济学在经济学研究中的地位、作用和局限性,计量经济学与数理经济学、数理统计学及经济统计学之间的差异,等等,并运用大量经济学和金融学中有代表性的实例说明计量经济学的应用以及在应用时应注意的若干问题。