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51.
选取2005-2016年285个地级及以上城市数据,利用静态和动态短面板模型分析经济密度和人口规模对环境污染的影响,分析表明:经济密度与环境污染之间存在“倒U型”关系,人口规模扩大会抑制污染物排放;不同等级城市经济密度、不同规模城市人口对环境污染的影响方向一致,但影响程度有所差异;前期污染排放对当期具有正向影响,环境污染物排放存在路径依赖;经济发展水平、工业产值占比和对外开放也是影响污染物排放的重要因素,但各指标对三类污染物排放的影响方向和影响程度存在差异。据此认为,在综合考虑城市具体空间区位条件下,人口适度集聚,提高城市经济密度,优化产业结构以及加强环境监管是环境治理的重要方向。 相似文献
52.
《Technovation》2020
Accelerators are a recent yet rapidly growing phenomenon within entrepreneurial ecosystems. The distinctive characteristics exhibited by accelerators, relative to previous incubation models, imply that accelerators may play a different role and have a different impact on the survival rates of participating firms. In this study, we explore the relationship between participation in an accelerator program and firm survival using fuzzy-set qualitative comparative analysis (fsQCA) with key variables related to firm survival. We analyze 38 accelerated startups from five Italian accelerators and a control group of 38 non-accelerated Italian startups. Our findings support the business accelerator literature that regards accelerators as a new and distinct generation of business incubators. Our results suggest that participation in accelerator programs on its own does not influence firm survival. However, we found a relationship between firm survival and accelerated technology-based firms that do not export and between firm survival and accelerated firms in the service sector with a small team that do not export. We conclude that factors affecting the survival of accelerated firms are different from factors affecting the survival of incubated firms, providing further evidence of the characteristics that distinguish accelerators from incubators. 相似文献
53.
中小企业从银行获得的融资十分有限.以Elod Takáts模型为基础的银行规模分析解释了银行规模与中小企业贷款的无关性,以Akerlof模型为基础的信息不对称分析解释了中小企业在贷款中的逆向选择问题.可以通过多种方式消除逆向选择问题,从根本上解决中小企业贷款难题. 相似文献
54.
曲明 《沈阳工程学院学报(社会科学版)》2005,1(3):76-78
促进中小企业发展的经济理论基础源于市场与政府的配置机制.促进我国中小企业发展要解决的前提性问题是要界定什么是中小企业,其次是如何建立中小企业发展的法律环境体系. 相似文献
55.
关于完善我国部门预算改革的基本思路 总被引:1,自引:0,他引:1
付芳 《广西经济管理干部学院学报》2002,14(1):31-33
文章就如何进一步完善我国部门预算改革问题 ,从完善法规政策、改革预算科目、制定合理标准、调整相应机构等方面提出了一些建议。 相似文献
56.
Francesco Calza Adele Parmentola Ilaria Tutore 《Business Strategy and the Environment》2021,30(1):267-281
Although many scholars have demonstrated that companies engaged in collaborations achieve better environmental performance than other companies, existing studies have not analyzed in depth whether this effect changes considering the characteristics of cooperation. Our paper aims to explore whether collaboration with other companies always has a positive effect on environmental performance or whether it depends on cooperation goals, collaboration type, or company size. Empirical analysis based on a sample of 773 European companies demonstrated that an external source of knowledge is an important way to foster firms' environmental proactivity, especially when environmental goals are shared at the basis of collaboration. Second, we verified that companies involved in JVs with environmental goals achieve greater environmental performance than companies that use M&As to acquire external knowledge. Finally, we demonstrated that it is more important for small companies to be involved in environmental collaboration than larger ones. 相似文献
57.
以吉林省为研究区域,运用重心分析模型和地理统计法,在综合分析城镇化空间格局时空演变特征及问题的基础上,将情景分析法运用到城镇化空间格局优化中,从理论和实践两个维度研究了区域城镇化空间格局优化问题。结果显示:以"区域城镇化空间格局优化"为核心目标,以情景分析法为基础,构建了"时空演变特征→存在问题总结→情景优化模拟→发展战略选择"的区域城镇化空间格局优化逻辑路径,并成功运用到吉林省城镇化空间格局优化实践中。通过情景构建、分析与评价,最终提出"强化中部、发展组团、构筑支点、区域联动"的吉林省空间发展战略和区域城镇化发展导向,构建"一群三团四轴"的城镇化空间发展格局,即以中部城市群为核心,以图们江区域城镇组团、通白城镇组团和西部白城城镇组团为支撑的城镇化主体发展形态,以哈大轴、图乌轴、东部沿边轴及南部门户轴为发展主轴的区域联动发展轴带格局。 相似文献
58.
This article aims to improve the predictive ability of KMV model by distinguishing firm size. The evidence suggests that default point would vary with firm size. Using the method of particle swarm optimization, we obtain the optimal default point separately for large firms and small firms. Several statistical tests such as the model confidence set methodology show that our relatively tractable model is more likely to have the strongest predictive ability. 相似文献
59.
We examine differences in information content between order submission sizes and trade sizes by U.S. equity traders. Increasing (decreasing) order submission (trade) size is reflective of information. The result suggests that better-informed traders want to trade in a large size, but that they engage in stealth trading practices or break larger orders into smaller sizes in order to conceal information. While prior studies tend to narrowly focus on trade executions at the market-centre level, our findings indicate that order submission size varies significantly from trade size and that both sizes are informative about future prices, albeit in an inverse manner. 相似文献
60.
Julia Koralun-Bereźnicka 《Applied economics letters》2018,25(18):1319-1322
The study aims at verifying whether the firm size and debt maturity affect the relationship between capital structure and its main determinants. Using panel data models, the impact of the primary factors on leverage is compared across three size groups of firms and for different measures of debt in order to identify the size effect and the debt maturity effect in these relationships. The study covers 11 EU countries during the period 2000–2013. Findings provide evidence that financing choices of small firms provide more support for the pecking-order theory, whereas medium and large-sized firms tend to follow the trade-off predictions on leverage. It also appears that the trade-off theory is more applicable for short-term debt, while pecking order – for long-term debt. 相似文献