中国家庭股市资产价值变动对居民消费的影响——来自CHFS的微观证据

近年来针对股市资产价值变动与消费关系的研究多采用宏观数据，难以揭示股市资产价值变动对居民消费影响的细节。为克服以上缺陷，文章利用中国家庭金融调查（CHFS）数据分析股市资产价值变动对中国居民消费的影响。实证结果表明：（1）股市资产价值变动对居民消费的影响总体较弱，其中市值变动的财富效应主要体现在改善性消费上，而对饮食等日常必须消费和奢侈品消费影响较小，这可能与我国居民的收入结构和投资方式有关；（2）随着年龄增长，居民的收入分布和资产配置倾向发生改变，股市资产价值变动对不同年龄居民消费的影响呈现先减小后增大的U型分布。研究结论揭示了股市资产价值变动对居民消费影响的分布特征，为今后股市改革方向提供了建议。     

“Retail is detail! Give consumers a gift rather than a bundle”: Promotion framing and consumer product returns

Retailers often use the promotion strategy of offering supplementary products (e.g., free gift, bundle) to attract consumers and increase sales. Despite the growing literature on the promotions that are differently framed but offer economically identical values, little research has examined the link between promotion framing and consumer product returns. The current article sheds light on this relationship, hypothesizing that a free gift promotion would be superior to a bundle promotion in reducing consumer product returns. The findings suggest that a gift‐framed promotion leads to a lower product return intention than an economically equivalent bundle promotion, because consumers tend to perceive more loss from giving up the gift‐framed (vs. bundle‐framed) deal. Further, this study examines a moderating role of brand familiarity (familiar vs. unfamiliar) and shows that the merits of free gift framing on product return intention via perceived loss are amplified (attenuated) when the promoted brand is familiar (unfamiliar). Overall, the investigations of this study imply that it is better to frame a promotion as a “free gift” than a “bundle” to increase perceived loss in returning the purchase and thus to decrease consumer product returns. This strategic intervention works especially when the gift is offered by familiar brands.     

Stadiums and Scheduling: Measuring Deadweight Losses in the Victorian Football League, 1920–70

Over a 50 year period, Australian Rules football's major league, the Victorian Football League, did not always use its largest and best-equipped stadium for regular season games between its most popular teams or schedule those teams to play twice in a regular season. We calculate deadweight losses from the use of capital goods (stadiums) and effects of match scheduling in this professional sports league. Such analysis has not been attempted previously because of the absence of a counterfactual. The welfare losses were significant but not sufficient to threaten the survival of a distance-protected cartel.     

超声波技术在食品检测中的应用

超声波技术因其具备适应性强、操作简单、设备投资低等优势而被广泛应用于食品检测领域。本文介绍了超声波技术检测食品的原理和在食品检测中的应用价值,并详细阐述了该技术在食品检测中的具体应用,为超声波技术更好的应用于食品检测领域提供参考。     

A practical road map for assessing cyber risk

The increase in interconnectivity and developments in technology have caused cyber security to become a universal concern. This paper highlights the dangers of the evolution of cyber risk, the challenges of quantifying the impact of cyber-attacks and the feasibility of the traditional actuarial methodologies for quantifying cyber losses. In this paper, we present a practical roadmap for assessing cyber risk, a roadmap that emphasizes the importance of developing a company and culture-specific risk and resilience model. We develop a structure for a Bayesian network to model the financial loss as a function of the key drivers of risk and resilience. We use qualitative scorecard assessment to determine the level of cyber risk exposure and evaluate the effectiveness of resilience efforts in the organization. We highlight the importance of capitalizing on the knowledge of experts within the organization and discuss methods for aggregating multiple assessments. From an enterprise risk management perspective, impact on value should be the primary concern of managers. This paper uses a value-centric/reputational approach to risk management rather than a regulatory/capital-centric approach to risk.     

Some Variants of Constrained Estimation in Finite Population Sampling

This is a review article that unifies several important examples using constrained optimisation techniques. The basic tools are three simple mathematical optimisation results subject to certain constraints. Applications include calibration, benchmarking in small area estimation and imputation. A final illustration is constrained optimisation under a general divergence loss.     

价值链视角下中心城市创新首位度评价与比较研究——以南京为例

基于创新价值链理论，构建创新首位度的理论内涵与评价体系，对南京和其它中心城市的创新首位度进行评价与比较。研究结果显示：①在总体首位度方面，南京位列省域中心城市排名下游，落后于西安、成都、武汉、郑州、广州等国家中心城市，自2008年以来一直落后于深圳、杭州、合肥、苏州等对标竞争城市且差距较大；②在分项首位度方面，南京的研发创新、产业创新首位度位列省域中心城市排名底端，导致南京在两个首位度矩阵中均处于C象限，创新价值链呈现严重的不均衡性；③省域中心城市普遍存在创新价值链的“漏斗效应”，即知识创新首位度＞研发创新首位度＞产业创新首位度，南京尤甚，说明技术创新过程存在大量沟壑；④拓展性研究表明，省域中心城市的创新首位度＞经济首位度＞人口首位度，但是近十年3个首位度的增速排序与上述情况相反，说明创新资源有着更强的集聚效应，应避免行政手段对创新资源的错配。最后，提出对策建议与研究展望。     

创新生态系统视角下价值共创如何影响企业创新绩效——一个有调节的中介模型

以创新生态系统为视角，引入创新资源互动与生态系统规范机制为中介变量和调节变量，探究价值共创如何影响企业创新绩效。基于307家企业样本数据，运用结构方程模型、Bootstrap和层级回归方法对数据进行分析。研究发现：创新生态系统中，价值共创不完全直接影响企业创新绩效；创新资源互动部分中介价值共创对企业创新绩效的影响；生态系统规范机制部分正向调节价值共创对创新资源互动的影响。最后提出，创新生态系统调控方与企业要差异化地制定提升创新绩效的实施方案，营造活跃的创新资源互动氛围，形成并完善系统内生态规范机制。     

长江经济带人才集聚水平测度及时空演变研究——基于价值链视角

基于价值链视角，构建涵盖人才资源在区域空间层面集聚生成、地区配置、效能产出3个维度在内的区域人才集聚水平评价指标体系，采用专家咨询AHP-信息熵组合赋权法构建综合评价模型和耦合协调度模型，对2010—2018年长江经济带沿线省市人才集聚水平进行测度与时空演化特征分析。结果表明，就长江经济带整体而言，考察期内地区人才集聚水平总体呈现逐年上升态势，但仍处于低水平状态；沿线省市人才集聚水平差异显著，缩小趋势渐缓，整体呈现局部高水平、全局低效率的不利境况；各省市人才集聚水平关键维度的耦合协调度整体呈显著波动递增态势，但内部耦合协调度存在不平衡发展问题，影响地区人才集聚水平整体提升。为提升长江经济带人才集聚水平，推进沿线地区协调发展，需强化区域人才合作机制，采取差别化精准策略破解沿线地区人才集聚低水平、不协调的短板因素。     

Unraveling the dynamic and contingency mechanism between service experience and customer engagement with luxury hotel brands

This study unravels the dynamic and contingency mechanism between service experience and customer engagement with luxury hotel brands by investigating a multi-step model linking these two variables, in which emotional attachment and relational quality constructs (i.e., brand satisfaction, brand trust, and brand commitment) act as a bridge, while customer involvement acts as a moderator. Based on a self-administered survey dataset of 249 international tourists who are customers of luxury hotel brands, partial least square structural equation modeling (PLS-SEM) is used to test the hypotheses. The results indicate that all proposed hypotheses are supported. As such, this study discovers and clarifies the nature and dynamic mechanism underpinning the co-creation and reciprocation process of customer engagement with luxury hotels. In particular, the positive service experience is found to contribute to customer engagement via emotional attachment and relational marketing. Furthermore, the moderating role of customer involvement in the luxury hotel setting is confirmed.