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'Another Roof, Another Proof': How Mobility Explains Individual Productivity in Science “另一个屋顶,另一个证据”:科学中的流动性如何解释个人生产力
Pub Date : 2017-08-24 DOI: 10.2139/ssrn.3025587
Valentina Tartari, Francesco Di Lorenzo, Benjamin A. Campbell
The mobility of highly skilled employees is seen as a critical way for organizations to transfer knowledge and to improve organizational performance. Yet, the relationship between mobility and individual performance is still largely a theoretical and empirical puzzle. Building both on human capital mobility research and economics of science literature, and exploiting a unique dataset of 348 academics working in biology department in the United Kingdom, we show that mobility has a positive effect on individual productivity. We also find that this positive effect is reinforced when academics move towards better-endowed institutions. We complement our econometrical analysis with more qualitative evidence from a survey.
高技能员工的流动性被视为组织传递知识和提高组织绩效的关键途径。然而,流动性和个人绩效之间的关系在很大程度上仍然是一个理论和实证难题。基于人力资本流动性研究和科学文献经济学,并利用348位在英国生物系工作的学者的独特数据集,我们表明流动性对个人生产力有积极影响。我们还发现,当学者迁往财力更雄厚的院校时,这种积极影响会得到加强。我们用来自一项调查的更多定性证据来补充计量经济学分析。
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引用次数: 0
An Advisor Like Me? Advisor Gender and Post-Graduate Careers in Science 像我这样的顾问?科学领域的顾问、性别和研究生职业
Pub Date : 2017-08-01 DOI: 10.2139/ssrn.3014467
P. Gaulé, M. Piacentini
We investigate whether having an advisor of the same gender is correlated with the productivity of PhD science students and their propensity to stay in academic science. Our analysis is based on an original dataset covering nearly 20,000 PhD graduates and their advisors from U.S. chemistry departments. We find that students with an advisor of the same gender tend to be more productive during the PhD and more likely to become professors themselves. We suggest that the under-representation of women in science and engineering faculty positions may perpetuate itself through the lower availability of same-gender advisors for female students.
我们调查是否有一个同性导师与博士生的生产力和他们留在学术科学倾向相关。我们的分析基于一个原始数据集,涵盖了来自美国化学系的近2万名博士毕业生及其导师。我们发现,有同性导师的学生在攻读博士学位期间往往更有成效,自己也更有可能成为教授。我们认为,女性在科学和工程学院职位上的代表性不足,可能会因为女性学生获得同性顾问的机会较少而长期存在。
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引用次数: 76
Do Mincerian Wage Equations Inform How Schooling Influences Productivity? Mincerian工资方程式能告诉我们学校教育如何影响生产力吗?
Pub Date : 2017-07-09 DOI: 10.2139/ssrn.3000861
C. Groth, J. Growiec
We study the links between the Mincerian wage equation (the cross-sectional relationship between wages and years of schooling) and the human capital production function (the causal effect of schooling on labor productivity). Based on a stylized Mincerian general equilibrium model with imperfect substitutability across skill types and ex ante identical workers, we demonstrate that the mechanism of compensating wage differentials renders the Mincerian wage equation uninformative for the human capital production function. Proper identification of the human capital production function should take into account the equilibrium allocation of individuals across skill types.
我们研究了Mincerian工资方程(工资与受教育年限之间的横截面关系)和人力资本生产函数(受教育程度对劳动生产率的因果影响)之间的联系。基于具有不完全可替代性的程式化Mincerian一般均衡模型,我们证明了补偿工资差异的机制使得Mincerian工资方程对人力资本生产函数缺乏信息。正确识别人力资本生产函数应该考虑到个人在不同技能类型之间的均衡配置。
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引用次数: 0
Scientific Production and Productivity in Curriculum Vitae Characterisation: Simple and Nested H Indices that Support Cross-Disciplinary Comparisons 科学生产和生产力的简历特征:简单和嵌套的H指数支持跨学科比较
Pub Date : 2017-06-27 DOI: 10.2139/ssrn.2993316
Fabio Zagonari
In this study, I developed operational versions of Hirsch’s H index that can be applied to each researcher’s curriculum vitae (CV) to allow cross-disciplinary comparisons. The revised indices account for anomalies that potentially arise from tactical or opportunistic citation and publication behaviours by authors and editors, and can be calculated from readily available information. I split the original H index into nested indices to isolate networking activity, distinguish scientific production and productivity, and used nested Gini indices to identify intentional and successful inter-topical and inter-disciplinary research. I applied the most popular normalisations (i.e., per author and per year) using simple methodologies (i.e., least-squares linear and cubic interpolation fitting, whole-career vs. sub-periods, two-dimensional graphs) to solve empirical problems (e.g., sensitivity to citations, the “fashion” effect, attribution to disciplines, life cycle of articles) as well as open questions (e.g., the attribution of an article to a given discipline) associated with the original H index. I provided three numerical examples based on a representative heterodox, a representative orthodox multi-disciplinary, and a representative orthodox uni-disciplinary CV: the first CV includes 17 Scopus publications, and shows a highly heterodox (i.e., 5.8%), but no interdisciplinary research career, with a tiny networking component (i.e., 0.9%); the second CV includes 24 Scopus publications, and shows a slightly heterodox (i.e., 0.3%), but highly interdisciplinary (i.e., 53.9%) research career, with a small networking component (i.e., 14.3%); the third CV includes 16 Scopus publications, and shows slightly heterodox (i.e., 0.1%) and no interdisciplinary research career, with no networking component.
在这项研究中,我开发了赫希H指数的操作版本,可以应用于每个研究人员的简历(CV),以便进行跨学科比较。修订后的索引考虑了作者和编辑可能由于战术或机会性引用和发表行为而产生的异常情况,并且可以根据现成的信息进行计算。我将原来的H指数拆分为嵌套指数,以隔离网络活动,区分科学生产和生产力,并使用嵌套基尼指数来识别有意和成功的跨主题和跨学科研究。我使用简单的方法(即,最小二乘线性和三次插值拟合,整个职业生涯与子时期,二维图)应用最流行的归一化(即,每个作者和每年)来解决与原始H指数相关的经验问题(例如,对引用的敏感性,“时尚”效应,学科归属,文章的生命周期)以及开放式问题(例如,文章归属于给定学科)。我提供了三个基于代表性非正统、代表性正统多学科和代表性正统单学科CV的数值例子:第一个CV包括17篇Scopus出版物,显示出高度非正统(即5.8%),但没有跨学科研究生涯,网络成分很小(即0.9%);第二份简历包括24份Scopus出版物,显示了一个略微异端(即0.3%),但高度跨学科(即53.9%)的研究生涯,其中有一小部分网络成分(即14.3%);第三份简历包括16份Scopus出版物,并显示出轻微的非正统(即0.1%),没有跨学科的研究生涯,没有网络成分。
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引用次数: 4
Structural Changes of the U.S. Economy: Implications for the U.S. Mid- to Long-Term Growth Path and the Korean Economy 美国经济的结构变化:对美国中长期增长路径和韩国经济的启示
Pub Date : 2017-06-22 DOI: 10.2139/SSRN.2991402
Wongi Kim
s shown in various data, during the 2008-2009 financial crisis period, the real GDP of each country recovered slowly after a sharp decline, but is recovering differently in each country. In the case of the United States, it shows a rapid recovery compared to Japan and Europe. Despite the rapid recovery compared to other developed countries, there are still many people who harbor doubts regarding the mid- to long-term growth path of the U.S. economy. In the mid-to-long term, the growth potential of the U.S. is limited to the mid-1% range, and renowned economists such as Larry Summers and Paul Krugman are questioning the U.S.'s long-term growth by insisting on its secular stagnation. The U.S. mid- to long-term growth path will have a crucial impact on the future growth of the global economy in light of the U.S. weighting in the global economy. Especially, in the case of Korea, export is still a large part of the economy and the mid- to long-term growth of the global economy accounts for a large portion of Korea's mid- to long-term growth. In this situation, it is important to find a way to accelerate economic recovery through benchmarking of U.S. growth policies. We use the growth accounting method to diagnose whether the U.S. will grow in the medium-to-long term. Growth accounting is a method for analyzing the effects of supply side factors such as labor supply, total factor productivity, and labor quality on mid- and long-term growth, and is particularly appropriate for analyzing the impact of trend growth decline. The results of the analysis are as follows. According to labor supply factors, such as the degree of population aging, the quality of education and productivity, the U.S. economic potential growth rate is found to range from 1.4% to 2.9% on average by 2060 unless the effects of the aging of its population are reduced or there is a rapid increase in productivity due to the recent 4th industrial revolution. In spite of the not-so-great mid- to long-term growth path of the U.S., why is the U.S. re-covering faster than other developed countries after the financial crisis? One important reason is active monetary and fiscal policy. During the financial crisis, the U.S. Fed cut its policy rate to zero and conducted quantitative easing. Furthermore, the American Recovery and Reinvestment Act (ARRA) was enacted by the Obama administration to carry out a huge-scale fiscal stimulus package to boost the economy. In addition to these monetary and fiscal policies, supply side policies such as R&D investment played an important role to support the fast recovery. Based on the macroeconomic model that we build, we examined the impact of the decline in trend growth on the economic recovery and searched for the reasons of the rapid recovery of the U.S. Productivity is recovering faster in the U.S. than other countries after the financial crisis. The results of the model analysis show that the recovery of productivity reduces the decline of trend growth,
正如各种数据所显示的那样,在2008-2009年金融危机期间,各国的实际GDP在急剧下降后缓慢复苏,但各国的复苏情况不同。就美国而言,与日本和欧洲相比,它显示出快速复苏。尽管与其他发达国家相比,美国经济复苏速度较快,但仍有不少人对美国经济的中长期增长路径持怀疑态度。从中长期来看,美国的经济增长潜力仅为1%左右,萨默斯、克鲁格曼等著名经济学家对美国提出了质疑通过坚持长期停滞来实现美国的长期增长。考虑到美国在全球经济中的权重,美国的中长期增长路径将对未来全球经济增长产生至关重要的影响。特别是韩国,出口仍然占经济的很大一部分,世界经济的中长期增长占韩国中长期增长的很大一部分。在这种情况下,有必要以美国的增长政策为基准,寻找加速经济复苏的方法。我们使用增长会计方法来诊断美国是否会在中长期内增长。增长核算是分析劳动力供给、全要素生产率、劳动力素质等供给侧因素对中长期增长影响的一种方法,特别适用于分析趋势增长下降的影响。分析结果如下:根据人口高龄化程度、教育质量、生产率等劳动供给要素,如果不减少人口高龄化的影响或最近的第四次产业革命使生产率迅速提高,到2060年,美国的经济潜在增长率平均将在1.4% ~ 2.9%之间。尽管美国的中长期增长路径不太好,但为什么美国在金融危机后比其他发达国家复苏得更快?一个重要原因是积极的货币和财政政策。金融危机期间,美联储将政策利率降至零,并实施了量化宽松政策。此外,奥巴马政府制定了《美国复苏与再投资法案》(ARRA),以实施大规模的财政刺激计划,以提振经济。除了这些货币和财政政策外,研发投资等供给侧政策在支持经济快速复苏方面也发挥了重要作用。基于我们建立的宏观经济模型,我们考察了趋势增长率下降对经济复苏的影响,并寻找美国快速复苏的原因。金融危机后,美国的生产率恢复速度比其他国家快。模型分析结果表明,生产率的回升减缓了趋势增长的下降,这种较好的趋势增长对当前消费和投资是积极的,因为它提高了对未来收入增长的预期。美国生产率的快速复苏可归因于金融危机期间和之后发起的大规模国家研发。本文提出的政策影响可分为两大类。首先,对中长期外交政策的影响如下。美国是韩国的第二大出口市场,对世界经济的影响很大。韩国经济仍然高度依赖出口。考虑到这一点,我们需要使出口市场多样化,通过开发高附加值产品来提高出口单价,开发受经济波动影响较小的核心产品。此外,韩国的中长期增长战略建议如下。对韩国经济增长率进行供给侧分析的结果显示,最近经济增长率下降的原因是生产率下降、资本积累减少、劳动供给贡献度低。因此,有必要实施与奥巴马政府积极推动的提高生产率和创新相关政策类似的投资促进政策。最后,对国家中长期增长的研发政策的启示如下。韩国的研究开发(R&D)支出在经合组织(OECD)国家中位居首位。但其研发支出的不确定性远高于美国。研发支出波动性的增加所带来的不确定性可能会阻碍稳定的研究,从而导致研发支出效率的降低。在韩国,为了确保研究开发(R&D)投资的可持续性和提高效率,有必要建立这样的基准制度。
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引用次数: 0
Informal Intellectual Collaboration with Central Colleagues 与中心同事的非正式智力合作
Pub Date : 2017-06-18 DOI: 10.2139/ssrn.2877586
Co-Pierre Georg, Daniel C. Opolot, Michael E. Rose
When preparing a research article, academics engage in informal intellectual collaboration by asking their colleagues for feedback. This collaboration gives rise to a social network between academics. We study whether informal intellectual collaboration with an academic who is more central in this social network results in a research article having higher scientific impact. To address the well-known reflection problem in estimating network effects, we use the assignment of discussants at NBER summer institutes as a quasi-natural experiment. We show that manuscripts discussed by a discussant with a 10% higher than average Bonacich centrality rank results in 1.4% more citations and a 5% higher probability that an article is published in a top journal. To illustrate our results, we develop a structural model in which a positive externality from intellectual collaboration implies that collaborating with a more central colleague results in larger scientific impact of the research article.
在准备一篇研究文章时,学者们通过征求同事的反馈来进行非正式的智力合作。这种合作形成了学者之间的社交网络。我们研究了与在这个社会网络中处于中心位置的学者进行非正式的智力合作是否会产生更高的科学影响。为了解决在估计网络效应中众所周知的反思问题,我们使用NBER夏季研究所的讨论嘉宾分配作为准自然实验。我们发现,如果讨论者讨论的论文Bonacich中心性排名比平均水平高10%,那么该论文被引用的次数会增加1.4%,在顶级期刊上发表的可能性会增加5%。为了说明我们的结果,我们开发了一个结构模型,其中智力合作的正外部性意味着与更核心的同事合作会导致研究文章的更大科学影响。
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引用次数: 3
An Assessment of the Impact of Employee Motivation on Organisational Performance and Productivity in State-Owned Enterprises: A Case of ECG Legon District 国有企业员工激励对组织绩效和生产力的影响评价——以华电集团为例
Pub Date : 2017-05-21 DOI: 10.2139/ssrn.3563876
A. Tetteh
The success or failure of any business as a matter of fact depends largely on its employees;thus human resources are very essential to the organisation as they are the key stakeholders prosperity, productivity and performance. The aim of this study was to assess the impact of employee motivation on organisational performance and productivity at Electricity Company of Ghana, Legon District. The research work adopted a mixed approach of research design and the case study method to provide answers to research questions formulated. A probability design with the stratified sampling technique was employed to select and sample the opinions of 80 workers of ECG, Legon District on the issue. Data obtained from the field survey was later analysed using SPSS. The research made extensive use of both primary and secondary data. Primary data was obtained by administering a well-structured questionnaire to respondents and interviews were conducted with the lower level employees as categorized by the researcher. The study revealed that there is a relationship between motivation and performance and came to a conclusion that management should put in great efforts to motivate members of staff to enhance their performance. The researcher recommends that management should consider the issue of employee motivation very important to make ECG maintain its position as the only producer of Electricity in Ghana.
事实上,任何企业的成功或失败在很大程度上取决于其员工;因此,人力资源对组织非常重要,因为他们是关键的利益相关者繁荣,生产力和绩效。本研究的目的是评估员工动机对加纳勒贡地区电力公司组织绩效和生产力的影响。本研究工作采用研究设计与案例研究相结合的方法,对研究提出的问题提供答案。采用概率设计和分层抽样的方法,对勒贡区心电图局80名工作人员对该问题的意见进行抽取和抽样。从实地调查中获得的数据随后使用SPSS进行分析。这项研究广泛使用了一手资料和第二手资料。主要数据是通过管理一个结构良好的问卷调查,以受访者和访谈进行了较低层次的员工分类,由研究人员。该研究揭示了动机与绩效之间的关系,并得出结论,管理层应该付出很大的努力来激励员工提高他们的绩效。研究者建议管理层应该考虑员工激励的问题,以使ECG保持其作为加纳唯一的电力生产商的地位。
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引用次数: 0
Reallocation, Competition and Productivity: Evidence From a Financial Liberalization Episode 再分配、竞争和生产率:来自金融自由化时期的证据
Pub Date : 2017-04-30 DOI: 10.2139/ssrn.3030616
Liliana Varela
This article studies the impact of distortions in the access to international capital markets on competition and productivity. I show that a reduction in these distortions leads to an increase in aggregate productivity through two different channels. First, firms that were previously credit constrained respond to better financing terms by increasing their investment in technology, a reallocation effect. Secondly, non-constrained firms also expand their investment in technology because of increased competition, a pro-competitive effect. I provide evidence for these two channels using firm-level census data from the deregulation of international financial flows in Hungary.
本文研究了国际资本市场准入扭曲对竞争和生产率的影响。我表明,这些扭曲的减少会通过两个不同的渠道导致总生产率的提高。首先,以前受到信贷限制的公司通过增加对技术的投资来应对更好的融资条件,这是一种再分配效应。其次,无约束企业也会因为竞争加剧而扩大对技术的投资,这是一种促进竞争的效应。我使用来自匈牙利放松国际金融流动管制的公司层面普查数据为这两个渠道提供证据。
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引用次数: 64
Real Gdi, Productivity, and the Terms of Trade in Canada 加拿大的实际国内生产总值,生产力和贸易条件
Pub Date : 2017-02-01 DOI: 10.1111/roiw.12255
Shutao Cao, S. Kozicki
In this paper, a quarterly dataset of productivity is built for the Canadian business sector, and the Diewert and Yu (2012a) estimates of annual productivity growth are revised and updated to reflect changes in the new Canadian system of national economic accounts. The quarterly data are then used to study the contribution of total factor productivity and the terms of trade to growth of real gross domestic income. In most years of the 2000s, the contribution of the terms of trade became significant in real income growth, whereas that of total factor productivity growth was stagnant. Improvement in the terms of trade arises froma decline in the import price index and an increase in the export price index.
本文建立了加拿大商业部门的季度生产率数据集,并对Diewert和Yu (2012a)对年度生产率增长的估计进行了修订和更新,以反映加拿大新国民经济账户体系的变化。然后,季度数据被用来研究全要素生产率和贸易条件对实际国内总收入增长的贡献。在本世纪头十年的大多数年份,贸易条件对实际收入增长的贡献变得显著,而全要素生产率增长的贡献停滞不前。贸易条件的改善源于进口价格指数的下降和出口价格指数的上升。
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引用次数: 1
Micro Moments Database for Cross-Country Analysis of ICT, Innovation, and Economic Outcomes 用于ICT、创新和经济成果跨国分析的微时刻数据库
Pub Date : 2017-01-11 DOI: 10.2139/ssrn.2898860
E. Bartelsman, Eva Hagsten, M. Polder
This paper provides technical documentation to a database built up from firm-level sources titled Micro moments database (MMD) that is made available for researchers through Eurostat. The MMD is an internationally harmonized research database of statistical moments collected from linked longitudinal firm-level data in a large selection of EU national statistical offices. The underlying sources for the database are business registers, firm-level surveys on production, usage of Information and Communications Technologies (ICT) and innovative activities, as well as recorded information on trade and worker education, all linked at the firm level. The unit of observation in the MMD represents groups of firms within industries and allows research that bridges micro and macro analysis. The paper delineates the type of research questions that uniquely can be addressed with the MMD, and the advantages and disadvantages of using MMD for questions where alternative datasets are available. The paper next presents the methodology underlying construction of the MMD and provides documentation of the rich set of features. Finally, the paper provides descriptive statistics that highlight the unique character of the data and reviews some of the cross-country analytical work already conducted using the MMD.
本文提供了技术文档,建立了一个数据库,从企业层面的来源,标题为微时刻数据库(MMD),是通过欧盟统计局提供给研究人员。MMD是一个国际协调的统计矩研究数据库,从大量选择的欧盟国家统计办公室中收集的纵向企业数据收集。数据库的基本来源是商业登记、公司一级关于生产的调查、信息和通信技术的使用和创新活动,以及关于贸易和工人教育的记录资料,所有这些都在公司一级联系在一起。MMD中的观察单位代表了行业内的公司组,并允许连接微观和宏观分析的研究。本文描述了可以用MMD唯一地解决的研究问题的类型,以及在可选数据集可用的问题中使用MMD的优点和缺点。接下来,本文介绍了MMD的基本构造方法,并提供了丰富的特性集的文档。最后,本文提供了突出数据独特性的描述性统计数据,并回顾了已经使用MMD进行的一些跨国分析工作。
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引用次数: 16
期刊
ERN: Productivity (Topic)
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