产学研合作创新绩效影响因素元分析研究

为探寻中国产学研合作创新绩效影响因素，挖掘促进中国产学研深度融合的发力点,运用元分析方法，对中国国内与产学研合作创新绩效影响因素相关文献进行再分析，结果发现：①企业层面的企业规模、企业知识吸收能力、企业研发人员投入与企业研发经费投入，组织间层面的知识协同性、知识转移能力、信息沟通渠道及合作紧密度，政府层面的政策支持与经费支持，区域层面的法律法规完善性与经济发展水平均能够显著提升产学研合作创新绩效；②区位因素、数据类型分别对产学研合作创新绩效与企业规模、政府经费资助关系具有显著调节作用。     

网络嵌入、动态能力与企业创新绩效——一个模糊集定性比较分析

网络嵌入、动态能力与企业创新绩效间关系一直是战略管理领域研究的热点话题，但以往研究忽视了网络嵌入与动态能力各构成维度间不同组合对创新绩效的复杂性影响。因此，基于组态视角和集合论思想，采用模糊集定性比较分析法，以220家中国企业为样本，从企业外部网络嵌入和内部动态能力培育两个层面，探讨网络嵌入和动态能力的不同维度影响企业创新绩效的多重组合路径。研究结果表明：企业创新绩效提升路径包括网络嵌入—能力促进型、双元能力推动型、网络嵌入—能力冲突型和创新能力缺失弥补型4种构型，且网络嵌入三维度间存在一定的替代性。     

乌鲁木齐市建设用地对经济增长的贡献及Logistic曲线极限点估计研究

[目的]为提高乌鲁木齐市各生产要素的利用效率,明确经济发展模式,同时也为促进土地资源节约集约利用提供科学依据。[方法]基于C-D生产函数,以2005—2015年乌鲁木齐市统计数据为样本,借助EViews6.0和SPSS20.0软件测算出建设用地对经济增长的贡献率以及Logistic曲线极限点。[结果](1)资本投入要素对经济增长的贡献率(56.72%)最大,建设用地投入要素贡献(32.81%)次之,然后是劳动力投入要素贡献(13.25%),技术进步投入要素贡献(-2.78%)最小,但拥有很大的挖掘空间;(2)建设用地对经济增长的Logistic曲线极限点位于第二、三产业产值为1 522亿元处,对应2011年产值,2005—2011年建设用地对经济增长的贡献呈递增趋势,2011年之后贡献速度呈递减趋势,逐渐趋于平缓。[结论]建设用地对经济增长的驱动作用是有限的,只有通过技术创新才能实现经济发展模式由"依资本型"向"技术驱动型"转变。     

The effects of consumer empowerment on risk perception and satisfaction with food consumption

This study intends to measure consumer empowerment related to food consumption and determine its effect on food risk perception and satisfaction with food consumption. Data were derived from an analysis of the “2017 Research on Food Consumption Behaviour” by the Korea Rural Economic Institute. Consumer empowerment, risk perception and satisfaction with food consumption were measured using a 5‐point Likert scale. The differences in consumer empowerment according to gender, age, educational level and monthly income were statistically significant. The factors that affected risk perception were information use, healthy eating, consumer rights, consumer responsibility and monthly income. The higher the scores for information use, healthy eating and consumer responsibility, the higher the score for satisfaction with food consumption.     

基于VAR模型的旅游对经济发展的溢出效应研究——以北京旅游业发展为例

目的/意义旅游发展具有溢出效应，不仅对本地经济发展具有溢出效应，而且对其他地区的经济发展也具有溢出效应，本研究着重分析旅游业发展对其它省区经济发展的影响，为丰富旅游对经济发展影响的相关研究，全面认识旅游发展的作用，以及提升旅游发展的溢出效应提供参考。方法/过程收集1994—2015年北京市旅游收入与我国其他30个省区(不含港澳台)的地区生产总值数据，构建VAR模型，利用格兰杰因果关系检验、脉冲响应函数、方差分解等工具，分析北京市旅游业发展对其他省区经济发展的影响。结果/结论1) 北京市旅游的发展对其它地区经济的发展具有溢出效应，但溢出效应的显现往往需要一个较长的时间，历时越短，溢出效应越小，溢出的空间范围越小，反之，溢出效应越大，溢出的空间范围越大。2)北京市旅游发展对16个省区的经济发展具有溢出效应，溢出效应及其大小受旅游和经济贸易联系的密切程度以及投资价值的高低等因素的影响。旅游对经济发展的冲击作用随时间的推移而减弱，一般会在加入滞后变量结束后的后一期结束。3)旅游对经济的冲击作用一般发生在初期，在滞后期后第1~2期达到峰值，旅游对经济发展的影响一般表现为正向溢出效应，冲击作用在滞后末期将趋于平稳，逐步减少或消失。     

Can Shareholders Be at Rest after Adopting Clawback Provisions? Evidence from Stock Price Crash Risk

Using a propensity score matched sample and a difference‐in‐differences research design, we find that stock price crash risk increases after a firm voluntarily incorporates clawback provisions in executive officers' compensation contracts. This heightened crash risk is concentrated in adopters that increase upward real activities‐based earnings management and those that reduce the readability of 10‐K reports. Based on cross‐sectional analyses, we also find that the increased crash risk is more pronounced for adopters with high ex ante fraud risk, low‐ability managers, high CEO equity incentives, and low dedicated institutional ownership. Collectively, our results suggest that the clawback adoption per se does not curb managerial opportunism but rather induces managers to use alternative channels for concealing bad news, which may contribute to a greater stock price crash risk; and the increase in crash risk is more likely in cases where incentives are strong or monitoring is weak. Our results should be of interest to regulators and policymakers considering the effects of clawback adoption on the investing public.     

急腹症手术麻醉患者的护理

目的探讨急腹症手术患者麻醉的护理措施。方法在我院收治的行急腹症手术患者中选取36例,对其麻醉过程所采用的护理措施进行回顾性分析。结果 36例患者中,非常满意25例,比较满意10例,不满意1例,护理总满意度为97.2%。结论在急腹症手术过程中,给予患者良好的护理措施,可有效促进患者病情的恢复,提高患者的护理满意度。     

Where can obesity management policy make the largest impact? Evaluating sub-populations through a microsimulation approach

Background: There is a critical need to focus limited resources on sub-groups of patients with obesity where we expect the largest return on investment. This paper identifies patient sub-groups where an investment may result in larger positive economic and health outcomes.

Methods: The baseline population with obesity was derived from a public survey database and divided into sub-populations defined by demographics and disease status. In 2016, a validated model was used to simulate the incidence of diabetes, absenteeism, and direct medical cost in five care settings. Research findings were derived from the difference in population outcomes with and without weight loss over 15 years. Modeled weight loss scenarios included initial 5% or 12% reduction in body mass index followed by a gradual weight regain. Additional simulations were conducted to show alternative outcomes from different time courses and maintenance scenarios.

Results: Univariate analyses showed that age 45–64, pre-diabetes, female, or obesity class III are independently predictive of larger savings. After considering the correlation between these factors, multivariate analyses projected young females with obesity class I as the optimal sub-group to control obesity-related medical expenditures. In contrast, the population aged 20–35 with obesity class III will yield the best health outcomes. Also, the sub-group aged 45–54 with obesity class I will produce the biggest productivity improvement. Each additional year of weight loss maintained showed increased financial benefits.

Conclusions: This paper studied the heterogeneity between many sub-populations affected by obesity and recommended different priorities for decision-makers in economic, productivity, and health realms.     

高分1号冬小麦解译面积核算方法研究

[目的]以高分1号(GF-1)融合2m卫星遥感影像为基础数据源,结合土地利用现状数据、高分多源遥感影像和地面样方等数据,对冬小麦分类提取中存在的面积误差问题进行研究和分析。[方法]文章以河南省永城市为研究区,在冬小麦提取结果聚类处理基础上,基于线性地物缓冲区数据,采用GIS空间运算实现线性地物面积扣除,接着分析了样方数据和土地利用现状数据再扣除零星地物面积比例上的差异,并采用样方零星地物平均扣除系数对全市各乡镇耕地与非耕地中冬小麦提取面积进行了相关统计和误差分析。[结果]永城市冬小麦最终解译面积11. 29万hm~2,其中线性地物和零星地物扣除面积分别为6 613. 08hm~2和3 875. 22hm~2,占研究区冬小麦解译面积的5. 86%和3. 32%,与统计上报数据相比,其处理前后误差由14. 12%降低至4. 41%,有效地提高冬小麦提取面积精度。[结论]误差来源分析与修正对冬小麦解译面积核算精度具有重要影响,该研究为县级区域尺度下冬小麦面积提取核算提供了思路和借鉴。     

The time‐varying performance of UK analyst recommendation revisions: Do market conditions matter?

This study examines the time‐varying performance of investment strategies following analyst recommendation revisions in the UK stock market, with specific emphasis on the impact of changing market conditions. We find a negative relationship between the recommendation performance and market conditions as measured in terms of past market return and market volatility. In particular, the upgrade (downgrade) portfolio generates significantly positive (negative) net abnormal returns in bad market conditions (e.g., the dot‐com bubble burst in 2000 and the credit crisis in 2007), but not in other periods of time. Moreover, our non‐temporal threshold regression analysis shows that the reported negative relationship disappears when market conditions become better, i.e., when the past market return (market volatility) is higher (lower) than a certain level, indicating the importance of taking non‐linearity into account in the long sample period as examined in this study. Our time‐series bootstrap simulations further confirm that the superior recommendation performance in bad market conditions is not due to random chance; analysts have certain skills in making valuable up/downward revisions in bad markets.