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41.
Alexander Bilimovič 《Journal of Economics》1942,10(2):199-241
Ohne Zusammenfassung 相似文献
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Ian?S.?GinnsEmail author Stephen?J.?Norton Campbell?J.? Mcrobbie 《International Journal of Technology and Design Education》2005,15(1):47-60
It has been argued that design and technology can be used as a vehicle for teaching science and vice versa. In this paper, we report an investigation into Grade 6 students understandings of concepts embodied in the Systems strand of a technology syllabus as they grappled with a unit of work in technology for the first time. The unit of work involved students in the design and construction of simple systems, followed by experiences with more complex systems. Qualitative research methods were used to investigate the activities of the students as they engaged in the design and technology learning experiences for eight weeks. Data sources included student and teacher interviews, video and audio recordings of whole class and small group interactions, students notes, drawings and diagrams, and researchers field notes and reflections. Changes in students ability to identify the individual components and analyse how the components worked together in systems, and evidence of students use of scientific understandings for explanations, were noted as the unit of work progressed. An improvement was observed in students abilities to describe relationships between inputs, processes and outputs, and outline sequences of cause and effect. The technology and science appeared to be complementary as they developed technology specific and action-oriented technology and science language, which may be evidence of the presence of a community of learners. Recommendations are proposed for enhancing the value of both design and technology and science if both subjects are taught together as part of an integrated program in primary schools. 相似文献
44.
Maria?Da?Concei??o?Sampaio?De?SousaEmail author Borko?Sto?i? 《Journal of Productivity Analysis》2005,24(2):157-181
In this paper we estimate the DEA technical efficiency for 4796 Brazilian municipalities, by applying a recently proposed
“Jackstrap” method, which combines Bootstrap and Jackknife resampling techniques, to reduce the effect of outliers and possible
errors in the data set. We perform calculations to identify and eliminate high leverage municipalities, using different variants
of Data Envelopment Analysis (DEA), as well as Free Disposal Hull (FDH). Corroborating previous results, efficiency results
for the Brazilian municipalities show a clear relationship between the size of the municipality and its efficiency scores.
Indeed, under both DEA variants, smaller cities tend to be less efficient than larger ones hence indicating that the quality
of the frontier adjustment improves significantly as the size of the municipality increases. We present arguments that may
explain to some extent these findings, such as economies of scale and the excess spending due to revenue from royalties. However,
such effects require further, more careful examination. 相似文献
45.
关于巴塞尔协议规避银行系统危机的有效性研究 总被引:1,自引:0,他引:1
对银行实施监管是银行界的共识,最近几十年来,全球最核心的监管条例无疑就是巴塞尔协议。从巴塞尔委员会成立起,协议的修改和完善就从未停止,但即便如此,世界上两大经济体美国和欧盟都发生了足以载入史册的金融危机。那么,以巴塞尔协议为代表的规制能否彻底解决银行系统危机问题呢?本文以巴塞尔协议作为主要的研究对象,论证仅仅用规制的方式难以避免系统性风险,银行不仅需要市场化的资源配置手段,同时也需要直接的计划调控手段规避系统性风险。 相似文献
46.
在回顾文献基础上,本文梳理出贸易影响工资差距的机制,认为在劳动供给结构不变的前提下,工资差距决定于劳动需求结构变动,而劳动禀赋结构和技术效应结构是研究两者关系的重要范式。劳动禀赋结构模型是在两国生产两种产品且技术水平相同的框架下,贸易品由于劳动禀赋结构不同,导致单位成本产出水平变动,进而影响劳动需求结构和工资差距;而技术效应结构模型则是在两国生产一种产品且技术水平不同的框架下,贸易品由于技术效应结构不同,导致相对工资和劳动需求关系曲线变动,进而影响劳动需求结构和工资差距,而且直接效应和间接效应的传导机制有很大差别。 相似文献
47.
This paper studies spillovers among US and European sovereign yields. We employ absolute magnitude restrictions on the impact matrix to identify the countries that were the main sources of spillovers. Despite the large size of shocks from euro area stressed countries, connectedness among sovereign yields declined between 2008 and 2012 due to financial fragmentation, particularly between countries with more divergent business and fiscal cycles. We show that none of the sovereign yields were insulated from foreign shocks and that shocks to the Greek bond market in 2010 explained 20–30% of the variance of sovereign yields in stressed countries, while in 2011–2012 Italy (not Spain) was the source of systemic risk. 相似文献
48.
Tanja Istenič 《Post - Communist Economies》2019,31(5):579-602
Rapid population ageing increases interest in economic flows across ages and intergenerational transfers in general. This article uses the National Transfer Accounts methodology to measure consumption and production at each age, and how the difference between consumption and production is financed through (private and public) transfers and the interaction with assets, i.e. ‘asset-based reallocations’. During working ages, people earn more than they consume and with the surplus they finance the deficit of the young and old generations who consume more than they produce. Such a pattern of economic dependency is universal across countries and across time, but huge differences exist in the ages at which individuals produce more than they consume and vice versa. Moreover, the importance of private and public transfers and asset-based reallocations varies across countries and times. In the last three decades, life expectancy at birth in Slovenia increased by 9.3 years, while the age span in which production exceeds consumption narrowed rather than increased. Child dependents are predominantly financed by private transfers, whereas the elderly mainly rely on public transfers. Young and old individuals increasingly rely on public transfers. Together with rapid population ageing, this is likely to jeopardise the public finance system in the future. 相似文献
49.
50.
We examine the exports versus foreign direct investment (FDI) decision under demand uncertainty for an asymmetric cost duopoly. One of the firms can lead entry before demand realization or retain flexibility enjoying an informational advantage. When the time value of information is small and for sufficiently low investment costs, follow‐the‐leader behavior in FDI arises. Relatively high investment (fixed) costs result in follow‐the‐leader exporting behavior. When the time value of information becomes significant, the potential leader will opt for a wait‐and‐see strategy. For intermediate values of investment costs, the efficient firm invests, while the rival chooses to export. 相似文献