小子样可靠性评估方法的探索与研究

本文首先描述了小子样可靠性评估方法的国内外研究现状,介绍小子样可靠性评估试验方法的定义及应用,并结合民用无人机的发射速度进行了一次小子样产品的可靠性评估.综合运用了数据样本子样的概率分布拟合检验方法、样本数据的一致性检验和离群值识别等统计学方法,最终完成了对该产品的可靠性评估.     

最低工资标准、人力资本扩张与企业成本加成*

本文以人力资本扩张为切入点，构建了最低工资、人力资本扩张影响企业成本加成的理论框架，并使用中国1998-2013年284个地级市的工业企业数据进行了经验研究。结论显示：最低工资上调会显著抑制企业成本加成的提升，削弱了企业的市场势力，但该抑制效应在人力资本扩张的背景下得以缓解。同时本文通过进一步分组回归发现，最低工资标准与人力资本扩张对企业成本加成具有明显的异质性影响。因此，适度、稳定调整最低工资标准及推动人力资本质量的整体提升有助于保持企业成本加成能力及其动态竞争力。     

城市家庭碳排放的地域特征与变动规律——以日本47个城市为研究对象

分析日本47个城市家庭碳排放的地域特征和变动规律,结果发现:(1)1991-2011年间日本家庭碳排放呈现周期性变化规律,并且随着时间的推移,清洁能源的碳排放在家庭碳排放中的比重逐渐提高;(2)城市家庭碳排放体现出明显的地域特征,随着纬度的提高,人均家庭碳排放逐渐增加,家庭碳排放在城市碳排放中所占比重也逐渐提高,由于城市面积和人口密度不同,单位可居住面积的家庭碳排放水平呈现出南北两侧城市较低、中间城市较高的特点;(3)城市人口、性别比、人均GDP、家庭年收入、家用汽车和城市平均气温均是城市家庭碳排放的重要影响因素,对不同家庭碳排放水平具有正向的驱动作用或负向的抑制作用。日本城市家庭碳排放的地域特征和变动规律,体现了城市化进入更高阶段的情况下,家庭各类能耗碳排放与相关影响因素的关系,这可以为我国在城市化水平进一步提高的过程中,分析城市家庭碳排放的变动趋势和控制对策提供指导和借鉴。     

Modelling with flexibility through the business cycle: using a panel smooth transition model to test for the lipstick effect

ABSTRACT

Consumer spending typically declines during periods of economic distress, but observers have noted that lipstick purchases appear to increase during recessions, which is often referred to as the lipstick effect. However, the existence of such effect has remained empirically unconfirmed. Using weekly retail scanner data on lipstick sales from 2006 to 2016 in the United States, we applied a Panel Smooth Transition Regression (PSTR) demand model to test the relationship between economic distress and lipstick sales. This flexible demand specification allows regression coefficients to vary as a function of an exogenous macroeconomic variables and fluctuate asymmetrically, non-linearly, and time-varyingly across an unlimited number of regimes. Empirical results show the income elasticity of demand for lipstick decreased rapidly from 0.31 to 0.05 during the 2007–2009 recession, then slowly rebounded to 0.31 by the second quarter of 2014, thus first empirically confirming the existence of the lipstick effect.     

岩溶地质钻孔桩二次成孔护壁法施工技术

通过对大湖下行联络线岩溶地质钻孔桩施工出现问题的论述,结合岩溶地质钻孔桩常用的处理方法,提出了适应本区域岩溶地质环境的二次成孔护壁法在钻孔桩施工中的应用,并得到了成功的验证。     

大学生就业现状与高校教育收费的相关关系研究

近些年,大学生就业难已经成为社会所密切关注的问题之一.最近在对大学生就业难问题原因的探讨上,部分学者认为源于教育高收费,“成本困境”才是困扰大学生就业的真正致因抑或“瓶颈”.针对此种观点,本文在实证分析的基础上发现教育收费高并不是导致我国大学生就业难的根源,教育收费并不是大学生就业难的Granger原因,它只与我国大学生就业存在一定程度的负相关,并且这种相关性较弱,而学费高问题应由我国政府投入加以解决.     

管理者过度自信、企业风险承担与企业价值

追求企业价值最大化是企业经营管理的普遍目标.2002-2016年沪深两市的上市公司数据检验结果表明,过度自信会促使管理者更积极地识别选择高风险、高回报的项目,提高企业的风险承担水平,而选择这类项目有助于提高企业价值.具体表现为:越是过度自信的管理者,其所在企业风险承担水平越高,企业价值也越高.企业应重视风险项目的投资,充分意识到雇用过度自信的管理者可能对企业价值带来的积极作用.     

论代建制招投标的机理和模式

所谓的代建制,顾名思义,是一种由项目出资人委托有相应资质的项目代建人对项目的可行性研究、勘察、设计、监理、施工等全过程进行管理,并按照建设项目工期和设计要求完成建设任务,直至项目竣工验收后交付使用的项目建设管理模式.这使管理的技术及手段趋于现代,保证了工程质量、进度,并提高了投资效益.     

How does growth need strength influence employee outcomes? The roles of hope,leadership, and cultural value

Abstract

Strong growth need is essential if an employee is to be motivated to complete complex and challenging jobs. It is important for organizations to attract employees with high growth need strength and help them achieve positive outcomes. However, limited research has been conducted to examine the mechanism underlying growth need strength’s positive effect on employee outcomes. Based on hope theory, we hypothesized that hope mediates the effect of growth need strength on job performance and affective commitment by transforming employees’ general desire for personal growth into goal-related cognitive thinking, comprising both ‘will’ and ‘ways’. We further hypothesized the moderating effect of transformational leadership, and the joint moderating effect of transformational leadership and individual power distance on the relationship between growth need strength and hope. We tested our hypotheses with data from a sample of 265 subordinate–supervisor dyads from China. Data analysis results supported the mediating role of hope. We found that growth need strength has a stronger effect on hope when transformational leadership is higher, and this effect is the strongest when both transformational leadership and individual power distance are simultaneously higher. The implications of these findings for human resource management research and practice are discussed.     

China''s Port Industry:Competitiveness First!

Amid the global economic downturn,China's port industry has inevitably been affected.What should the government do to lift China's port industry out of hardship?What lies ahead for China's port industry?Professor Liu Bin,head of the World Economy Research Institute of Dalian Maritime University,took time to share his view with us.