Educational upgrading,structural change and the task composition of jobs in Europe

We analyze the changes in the task content of jobs in 24 European countries between 1998 and 2015. We link the O*NET occupational data with the European Union Labour Force Survey (EU‐LFS), and use the methodology of Acemoglu and Autor ( 2011 ). We find that the intensity of non‐routine cognitive tasks grew in all countries, while the intensity of manual tasks declined. Workforce upskilling was the major factor contributing to these developments. The intensity of routine cognitive tasks grew in most Central and Eastern European countries, but it declined in Western European countries. This difference is attributed to the contrasting patterns of structural changes in these groups of countries.     

创新驱动产业转型升级研究——基于中国1998-2016年省域面板数据

为了探究创新驱动产业转型升级的作用机制,构建了创新投入与创新产出对产业转型升级内涵质量与外显效应的影响模型,并提出研究假设。基于中国1998-2016年省域面板数据,借助Eviews 9.0计量软件,采用固定效应模型进行实证研究。结果表明,所提出的研究假设均得到验证。创新产出对产业转型升级内涵质量具有积极影响,创新产出的各表征变量(专利授权数、技术市场合同成交金额、新产品销售收入)每增长1%,产业转型升级内涵质量的表征变量人均国内生产总值将提高0.014 8%～0.051 1%。创新投入对产业转型升级外显效应具有积极影响,创新投入的各表征变量(R&D经费内部支出、R&D人员全时当量)每增加1%,产业转型升级外显效应的表征变量产业结构层次系数将提高0.007 1%～0.010 5%。因此,创新能够驱动产业转型升级,但创新投入与创新产出对产业转型升级的影响机制并不相同。研究结果为创新驱动产业转型升级问题的研究提供了一个新的研究范式,对实施创新驱动发展战略、促进产业转型升级有借鉴意义。     

Understanding the drivers of organic foods purchasing of millennials: Evidence from Brazil and Spain

This paper examines the antecedents of millennials' organic food purchasing. A conceptual framework, based on product characteristics, and consumers' concerns and consciousness, is proposed. Data collection was conducted through a survey in two culturally and socioeconomically distinct countries (Brazil vs. Spain) to increase the robustness and generalizability of the results. The results show that product characteristics and consumer concerns improve millennials’ health consciousness and increase their social consciousness, which, in turn, increase their willingness to pay a price premium and their purchase frequency of organic foods. The findings show that the proposed model has high validity, with only one significant difference between the two countries. Theoretical contributions and managerial implications are discussed.     

Contrasting user generated videos versus brand generated videos in ecommerce

This empirical research (n = 177) compared the impact of user generated videos and brand generated videos on online shopper perceptions, attitudes and purchase intentions. The study was guided by the technology acceptance model. Source of videos was a between-subjects factor. The findings indicated that online shoppers did not differentiate between the two video sources when evaluating the perceived usefulness of the videos. Conversely, user generated videos had a significantly greater impact on attitude toward the ad and attitude toward the brand than brand generated videos. Further, there was no significant main effect of video source on shopper purchase intentions. Theoretical and practical implications are discussed.     

Boosting the spread of new technologies: an integrative propositional analysis of diffusion policies

ABSTRACT

Although many studies have recognised the importance of defining specific public policies to encourage technology diffusion, many authors fail to provide a clear view about either the policies that affect the diffusion of technologies or the effect of the different political instruments. Adopting a content analysis of papers that directly or indirectly refer to the diffusion of a new technology, this study applies the integrative propositional analysis (IPA) methodology to: (a) identify the repertoire of the different diffusion policies identified by previous studies; (b) classify these policies according to the type of instruments that they use; (c) analyse the impact of each policy on the different adoption factors that may inhibit or foster the diffusion of a new technology; and (d) evaluate the scope of each type of policy in terms of the number of affected adoption factors.     

微波加热对叶绿素水溶液的影响

本文通过对叶绿素水溶液进行微波加热,分析微波加热对叶绿素水溶液的温度、色度、叶绿素含量的影响。结果表明,微波加热处理的水溶液温度显著高于对照沸水浴,1~2 min时,1000 W功率下的水溶液温度显著高于200 W(P<0.05)。与沸水浴相比,微波加热显著降低了叶绿素水溶液的绿色程度,且高功率微波加热显著加剧了水溶液亮度的变化。200 W微波加热使水溶液中叶绿素a、b含量降低,但1000 W微波加热则提高了水溶液中叶绿素a、b含量。     

三种不同蒸馏仪器测定食品中二氧化硫含量的对比

目的:比较传统玻璃蒸馏瓶蒸馏装置、二氧化硫测定仪、自动凯氏定氮仪3种仪器测定食品中二氧化硫的效果及适用性,为设备选型提供参考.方法:选取番薯干、咸菜、香菇干,分别用上述3种蒸馏装置测定样品中的二氧化硫含量,分析测定结果和过程控制.结果:使用3种不同蒸馏仪器测定结果无显著性差异,两次独立测定结果的绝对差值小于算术平均值的10%,回收率均在85%~95%.结论:二氧化硫测定仪自动化程度高,安全性高,基本可以替代传统玻璃蒸馏瓶蒸馏,实现大部分食品的批量检测,对于香菇干等蒸馏过程易倒吸食品,可采用自动凯氏定氮仪检测,提高实验的准确性和可靠性.     

超市常见含糖食品中糖含量分析

目的:分析超市含糖饮料的含糖量及种类情况。方法:在人流量大的综合超市,按照随机原则,购买74种含糖饮料,并采用离子交换色谱-脉冲安培积分方法检测各类糖分的含量。结果:各类饮料在葡萄糖、乳糖、果糖、麦芽糖、蔗糖以及总含糖量方面比较均具有统计学差异(P<0.05),总糖含量最高的为咖啡,其次为奶茶,总糖含量最少的为茶饮料。结论:各类含糖饮料在含糖种类和含量方面有所不同,咖啡与奶茶的总含糖量较高。     

基于内容分析法的科技成果转化政策演进趋势分析

科技成果转化政策是强化科技与经济联系,完善创新体系的重要手段,是推动创新驱动、实现高质量发展的关键。论文选取1996—2017年中国中央政府及各部委所发布的85篇与科技成果转化相关的政策文本,采用内容分析法对其演进趋势及内在规律分析,得出政策制定部门参与水平上升、政策工具搭配组合日益多元、重视提升政策客体转化积极性的结论,并对未来政策发展方向提供思路。     

川渝黔一体化发展的战略目标和基本内容

作为长江上游的核心区域，川渝黔一体化发展的本质就是长江上游区域的一体化发展。战略目标有两个方面：在成渝城市群基础上形成世界级城市群、形成世界级主导产业和企业集团。其战略意义有五个方面：极大缓解我国不平衡不充分发展与人民追求美好生活愿望之间的矛盾、率先促进长江上游区域一体化发展、有助于加快实现“一带一路”和长江经济带等发展目标、有利于保护水资源和建成上游生态屏障、使我国有一个长远和稳固的战略后方基地。一体化发展的基本内容包含五个方面：交通通信设施一体化、产业发展一体化、监管和生产要素一体化、生态环境一体化、人口流动时身份规定一体化。