Bank–firms topology in Italy

An empirical analysis of the Italian system of banks and firms is carried out using the network theory. The emerging architecture of this economic network shows peculiar behaviors: (i) Multiple lending is very widespread; (ii) Small firms are preferentially financed by small banks; (iii) Large firms are financed by many banks; (iv) the ratio between loans and deposits is much higher for large banks than for small banks, while (v) strong size heterogeneity appears among co-financing banks, and (vi) the spanning-tree is very hierarchical.     

高校知识溢出与企业创新绩效

本文利用全样本数据探讨了作为创新和知识溢出微观主体的高校对企业创新绩效的影响。本文通过ArcGIS测算了2007—2015年上市公司所在地周边全部高校数量,并以企业研发投入金额、发明专利衡量企业创新水平,利用Anselin et al.(2000)的KPF方程,采用双聚类OLS检验高校知识溢出对企业创新行为的影响效应与机制。研究发现:第一,高校知识溢出对企业研发创新投入和有效创新产出均具有显著促进作用;第二,知识溢出效应具有显著的地理邻近性特征,而行政边界关联影响较弱;第三,高校知识溢出通过提高企业研发投入,提升员工和管理层人力资本,进而影响企业创新绩效。进一步研究表明,空间异质性、高校异质性、企业异质性、中心城市集聚效应、高铁开通等因素导致高校知识溢出效应存在差异。     

Enticing the Stork: Can we Evaluate Pro‐Natal Policies Before Having Children?

Aside from immigration, the only meaningful demographic lever available to policymakers attempting to moderate the rate of ageing is the birth rate. This article departs from previous analyses of pro‐natal policies by studying determinants of pro‐natal options ex ante, which represents an advantage for policymakers looking to craft policies with prior knowledge of whether or not a demographic policy will have a significant effect. Our multinomial regression model for a US sample involving college students shows that the preferred choice of pro‐natal incentive is dependent on gender, economic class, number of planned children and migrant status. We find that females are more likely than males to choose any pro‐natal incentive over no incentive. The highest odds for increasing planned number of children are for maternity leave and parental leave options. Respondents associating themselves with the poorest economic class are more likely to choose daycare or government grant as pro‐natal options.     

以信息化提升嘉兴秀洲区传统产业研究

本文主要就以信息化提升秀洲区传统产业的问题进行了研讨，分析了秀洲区企业信息化的现状。提出相应的对策和措施。     

A Jump-diffusion Model for Exchange Rates in a Target Zone

We propose a simple jump-diffusion model for an exchange rate target zone. The model captures most stylized facts from the existing target zone models while remaining analytically tractable. The model is based on a modified two-limit version of the C OX , I NGERSOLL and R OSS (1985) model. In the model the exchange rate is kept within the band because the variance decreases as the exchange rate approaches the upper or lower limits of the band. We also consider an extension of the model with parity adjustments, which are modeled as Poisson jumps. Estimation of the model is by GMM based on conditional moments. We derive prices of currency options in our model, assuming that realignment jump risk is idiosyncratic. Throughout, we apply the theory to EMS exchange rate data. We show that, after the EMS crisis of 1993, currencies remain in an implicit target zone which is narrower than the officially announced target zones.     

From disruptions to struggles: Theorizing power in ERP implementation projects

Enterprise resource planning (ERP) implementation projects often fail to achieve their objectives. These often problematic projects are frequently the setting for intense and growing power struggles. Existing studies (e.g., Boonstra, 2006; Shepherd, Clegg, & Stride, 2009) have provided researchers with insights about issues of power in these projects. However, existing research has yet to provide a comprehensive picture of power in these projects or insights on how this picture changes with the passage of time. Clegg's (1989) circuits of power framework provides a useful tool for developing this needed comprehensive picture. We use the circuits of power framework as a tool for categorizing existing literature on power in ERP implementations. More importantly, we draw on this framework to provide a comprehensive view of power in the particular context of these projects. Specifically, we analyze the power relations during the implementation of an ERP in an organization. We do so by identifying how disturbances to the circuits of power – power struggles – arise and intensify during the implementation of the ERP. In this way, our work makes both a theoretical and an empirical contribution to the study of power in ERP implementation projects.     

从区位商视角论证构建城镇群的意义——以珠三角、大珠三角和泛珠三角区域为例

随着全球化和区域经济一体化的迅速发展,通过构建城镇群等城市联盟增强区域整体实力已成为提升城市竞争力积极有效的手段。从二十世纪九十年代初期起,先后形成的珠三角、大珠三角和泛珠三角城镇群,通过城市间的资源互补和优势扩散,带动区域整体水平,取得了跨越式发展。本文通过对珠三角、大珠三角和泛珠三角地区不同层次下各城市及区域主要产业就业人口区位商的计算比较,揭示了珠三角区域在制造业方面,大珠三角区域在生产性服务业方面及泛珠三角区域在生活性服务业方面的竞争优势,体现了不同层次城镇群内各行业的竞争发展趋势,由此验证了建立不同层次城镇群的必要性和竞争优势,为区域合作的政策措施提供一定的理论依据。     

The Log of Gravity at 15

Portuguese Economic Journal - We review the contribution of “The Log of Gravity” (Santos Silva and Tenreyro, Rev Econ Stat 88:641–658, 2006), summarize the main results in the...     

A proposed method to evaluate the quality of services using Fuzzy sets theory

This paper seeks to provide the services sector with a focus on the assessment of quality and for this purpose, a technique that may able a quantitative approach to evaluating quality is proposed. The use of the fuzzy sets theory to process data was used, thus allowing a more flexible and suitable insight into the characteristics of the service sector. An extension of the technique for order performance by similarity to the ideal solution was used. This informs managers of the distance from the company $\prime $ s current level of quality, if compared to a company of perfect quality by means of an overall evaluation. The same technique was used to detect changes in the level of quality during the period surveyed by using a stratified assessment. Finally, a practical application of the approach proposed is presented.     

煤发热量含义及其相互关系

指出煤的发热量是一项重要指标。重点介绍不同燃烧状态,不同基准的发热量的含义及其相互关系。