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71.
72.
Data driven test procedure for detection of change is introduced and its properties are studied. The new solution is max-type statistic related to data-driven rank tests for two-sample subproblems. Simulations show that the new test possesses high and stable power. The test is consistent at essentially any alternative. Asymptotic null distribution of the test is derived. The work of the first two authors has been partially supported by the grants GAČR 201/06/0186 and MSM 02160839. 相似文献
73.
《Socio》2015
Using a three-stage data envelopment analysis approach, this paper explores efficiency in the provision of social care for older people in 148 English Councils in 2009/10. Departing from D'Amico and Fernández (2012) [31] our measure of efficiency is inscribed within the production of welfare framework and based on self-reported quality of life of recipients of the services. Our results indicate a high level of efficiency, but once we control for the effects of a number of environmental variables, we found that more stringent eligibility criteria and higher assessment costs are negatively associated with the efficiency in the provision of social services. 相似文献
74.
我国大倾角煤层不仅分布广,地质条件、资源储量和需煤程度差别也很大。文章基于我国开采大倾角煤层的各种不同客观因素,探讨了多种大倾角煤层的采煤方法及其相关技术。 相似文献
75.
本文借助含有中间变量的两阶段DEA评价方法对陕西省涉农地区不同信用社的可持续经营效率进行了评价。得出了大部分涉农地区基层信用社存在存款严重不足、发放贷款效率比吸收存款效率高、非利息支出过多、非利息收入不足等结论。 相似文献
76.
矿产开发负效应与资源生态环境补偿机制研究 总被引:16,自引:0,他引:16
矿产开发的负效应是指采矿活动造成的资源生态环境损失,主要表现为资源耗损、生态破坏、环境污染以及区域发展能力下降等。本文基于矿产开发的负效应,初步构建了矿产开发的资源生态环境补偿机制的基本框架。提出应采取资源补偿、生态环境补偿与矿区/区域补偿,实行防范性补偿、即时性补偿与修复性补偿,实施实体性补偿、功能性补偿与价值性补偿。不同的补偿类型,其补偿主体、客体、原则、标准、方式各不相同,但总体上都遵循立法约束、政策引导与行政监管相结合的三位一体的补偿运行模式。建议开展矿产开发的资源环境补偿机制建设试点工作;形成部门间协调管理的工作机制;加强对矿产开发生态环境补偿的监督和评估。 相似文献
77.
Richard A. Lancioni Author Vitae Michael F. Smith Author VitaeAuthor Vitae 《Industrial Marketing Management》2003,32(3):211-217
The Internet is evolving as a powerful force in the new marketplace where the nexus of competition has changed from individual firms to efficient supply chain networks both between firms and within industries. This study explores Internet adoption patterns and operational applications in US supply chain networks. The data reveal that the integration of the Internet into supply chain management applications has increased and has moved away from indiscriminate application of novel Internet technologies towards becoming a focused endeavor with precise expectations and measurable goals. Specifically, the study finds that Internet usage within supply chains is maturing as evidenced by enhanced and increased productivity, reduced costs and increased profit for participating firms. 相似文献
78.
Laurens Cherchye Timo Kuosmanen Thierry Post 《International Journal of Production Economics》2002,80(3)
We extend the non-parametric methodology for empirical production analysis to deal with endogenous prices. As price endogeneity is often complemented by price uncertainty, we consider both the case of certain prices and the case of uncertain prices. The extensions are fully compatible with existing tools for eliciting and representing technology and price information, and preserves the tractable mathematical programming structure of the original methodology. An empirical application to the Dutch electricity distribution sector illustrates our extension. 相似文献
79.
Sungmin Park 《R&D Management》2015,45(5):549-568
This study analyzes the efficiency and productivity change within government subsidy recipients of a national technology innovation research and development (R&D) program. We examine 6,990 government‐sponsored, completed R&D projects during the last three performance follow‐up survey years from 2010 to 2012, and present a design of the sample of panel data to cope with the typical R&D performance time lag using a set of massive observations associated with completed R&D projects for the past 7 years from 2005 to 2011. In particular, data envelopment analysis is adopted to measure the efficiency and productivity change, which is measured in the Malmquist index. Parametric and nonparametric statistical tests are carried out to check for statistically significant differences among the characteristics regarding the types of government subsidy recipients. This study's major findings are as follows. First, during the entire period analyzed (2010–2012), there was a similar yearly pattern of statistically significant differences in the government subsidy means among the recipient types. In contrast, there were no obviously equivalent differences in the efficiency and productivity change. Second, the productivity had increased year on year, but the increments were reduced from year to year. Third, the productivity change was induced mainly by the Frontier‐shift, which indicates overall technology innovation progress, compared with the Catch‐up, which only indicates a simple increase in the efficiency. In particular, in this empirical analysis, the recipient types of ‘national laboratory’ and ‘large company’ had relatively larger sizes of government subsidies per project. However, the efficiency and productivity change of these types was not better than the others. This implies, therefore, that the government should control the ratio of the subsidy to the total R&D budget with an appropriate upper limit.
- I empirically evaluate the productivity change within a national technology innovation R&D program.
- I design a sample of panel data to cope with the typical R&D performance time lag using massive observations.
- There is no obvious relationship between the government subsidy size and R&D productivity change.
- Some particular types of government subsidy recipient are inferior in terms of R&D productivity change.
- It practically implies that the government should control the ratio of the subsidy to the total R&D budget.
80.
本文基于我国中小板和创业板960家上市企业2015~2019年年报数据,采用文本挖掘法构建度量企业数字化程度的指标,通过面板固定效应模型和多重中介效应模型就中小企业实施数字化变革对企业绩效的影响及其内在路径进行实证检验。研究发现:中小企业实施数字化变革可以通过提高运营效率、降低经营成本、提高创新水平,进而提升企业绩效;国有化程度和资本密集度的不同,会为中小企业实施数字化变革影响企业绩效的程度带来差异。本文试图揭开中小企业通过数字化变革创造多维价值进而提升企业绩效的“过程黑箱”,为鼓励中小企业积极拥抱数字化浪潮,实现自身高质量可持续发展提供理论与实践价值。 相似文献