拓宽选站思路 加快建站速度

文中从项目进度管理的角度,通过对基站选站的工作进行研究,针对选站工作提出选站的一些思路及解决方法。     

Global public spending efficiency in Tuscan municipalities

The paper presents a Data Envelopment Analysis aimed at studying the efficiency of Tuscan municipalities' public expenditure. Five strategic functions of Tuscan municipalities are first considered carrying out a non-aggregate analysis; then the overall expenditure composition of each municipality and the global spending efficiency are analysed by a proposed composite indicator. The main determinants affecting the municipalities' efficiency were further investigated. In particular, the obtained results may be consistently included in the long-standing debate on the municipal size, proving that the bigger the municipality, the greater its level of public expenditure efficiency.     

建设项目选址的规划论证

区域重大建设项目选址涉及到区域社会、经济、环境等各个方面,其选址的合理与否关系到区域社会经济的持续、快速、健康发展.科学的分析论证可加强建设项目的可操作性,也可使其规划管理依据更加充分、决策更加科学合理.基于此认识,提出了建设项目选址符合城市规划论证的主要内容,并以330千伏西安西南郊变电站选址为例进行了详细的说明和论述.     

TCL家电回收中心的选址

TCL在现有销售物流体系基础上,建立了以回收中心为主体的家电产品回收逆向物流的网络结构模型.     

Entrepreneurship and Firm Boundaries: The Theory of A Firm

abstract In this paper, we consider how a better understanding of entrepreneurial activities can help explain how firm and industry boundaries change over time and how a more comprehensive understanding of boundary setting can explain where entrepreneurial activities are directed. We start from the premise that while entrepreneurs believe themselves to have superior ideas in one or multiple parts of the value chain, they are characteristically short of cash, and of the ability to convince others to provide it. This premise motivates a simple model in which the entrepreneur has a value‐adding set of ideas for ‘upstream’ and ‘downstream’ parts of a value chain, as well as for the ways to make these two parts of the value chain work better when joined under unitary control. Assuming that the entrepreneur's objective is to maximize her wealth, we observe that even in the presence of transactional risks or other factors that might make integration preferable to specialization, initial scope depends also on relatively unexplored factors such as (a) how severe the entrepreneur's cash constraint is, and (b) how much value the entrepreneur's ideas add at each part of the value chain. Entrepreneurs will focus on the areas that provide the maximum profit yield per available cash – a criterion which implies that scope choices depend on cash availability and the depth of the demand for the new idea along the value chain. We also note that entrepreneurs make money not only from the operating profits of their firms, but also from the appreciation of the assets the firm has accumulated. This consideration can change the optimal choice of the firms’ boundaries, as entrepreneurs must be sensitive to choosing the segment that will enable them to benefit not only in terms of profit, but also in terms of asset appreciation. We propose that, in the entrepreneurial context especially, it is helpful to focus on the multiple considerations affecting the choice of boundaries for ‘a’ firm – the context faced by an individual entrepreneur – rather than on generic considerations affecting ‘the’ (representative) firm. Scope choices reflect the entrepreneur's own theory of ‘how to make money’.     

大城市市郊铁路的发展

文章论述了大城市发展市郊铁路的必要性及合理性 ,并对怎样发展市郊铁路及其经营等问题进行了阐述。     

Firm value and investment in R&D

This paper employs Canadian stock market and corporate financial data to test the hypothesis that the market places a positive value on reported research and development spending of firms as an indicator of expected profitability and growth. The empirical results show a positive, statistically significant relationship between R&D spending and market value. The magnitudes of estimated coefficients are consistent with those reported in several published US studies. These results suggest that investment in R&D is a rational allocation of resources, contrary to the undervaluation hypothesis.     

Backup coverage models in nature reserve site selection with spatial spread risk heterogeneity

Set covering and maximal covering problems are well-known integer programming models in location analysis. Such models have also been used in reserve site selection modeling. They aim at selecting sites to conserve species, sometimes reflecting a desire to group protected sites together or to separate sites. This paper uses such models but considers the case of land heterogeneity in terms of the risk of large disturbances that threaten species even within a reserve, such as fires, diseases, pests or invasive species. It removes the classical assumption of homogeneous land sites and considers both adjacency in areas with a low risk of multi-parcel disturbance and distance between sites in areas with a high risk of a large destructive event. The models are explored in a stylized data set and applied to a portion of the state of Oregon with comparison between the standard covering models in homogeneous and heterogeneous risk settings.     

企业杠杆率、中长期信贷与企业绩效

信贷的期限结构对企业绩效具有重要影响,加强对非金融企业中长期信贷支持是提升企业绩效的重要手段。文章将企业杠杆率纳入中长期信贷与企业绩效关系的分析,研究表明:第一,当企业杠杆率处于中低区间时,中长期信贷能够显著提升企业绩效,当企业杠杆率过高时,中长期信贷对企业绩效的提升作用被削弱,但在中高杠杆率区间,对民营企业提供中长期信贷支持更能提升其绩效;第二,随着时间的推移,中长期信贷对企业绩效的提升作用不断走弱;第三,在一定杠杆率水平下,中长期信贷与企业绩效呈倒U型关系,且这一关系在中小企业、民营企业和高成长企业中更显著。     

Firm break-up and performance

We analyze the effects of firm break-up on corporate performance. Our analysis is based on a unique data set for a large number of Czech firms spanning the period 1996–2000. We employ a propensity score matching procedure to deal with endogeneity problems. Our results, which are generally in line with the positive effects of firm break-up found in the developed-market literature, show that the initial effects of firm break-up are positive but after a certain point they disappear within a short time. Factors like changes in ownership structure or management are found to be behind later improvements in the performance of firms.     

Local public goods and the demand for high-income municipalities

Affluent towns often deliver high-quality public services to their residents. I estimate the willingness to pay to live in a high-income suburb, above and beyond the demand of wealthy neighbors, by measuring changes in housing prices across city–suburban borders as the income disparity between the two municipalities changes over time. I find that a $10,000 increase in town-level median income is associated with a seven percent increase in housing values at the border. The estimated demand for high-income municipalities is primarily driven by school quality and lower property tax rates.     

北京市农村城市化评价指标体系

为进一步推动北京市城市化及城乡一体化进程,制定了北京市农村城市化评价指标体系与测评方法,并运用其进行实证分析,提出了相关对策建议.     

The break-up of municipalities: Voting behavior in local referenda

This paper examines the economic and political conditions that influence peoples attitudes regarding a municipality break-up. The theoretical model predicts intra-municipal differences in tax bases, political preferences, and population size to affect the expected gain from secession. The predictions of the model are tested using data on local referenda about municipality partitioning in Sweden. The data support one of the three effects; voters in municipality parts that are wealthy compared to other parts of the same municipality are more positive to secession.Received: April 2003, Accepted: September 2003, JEL Classification Numbers: H11, H73Anna Brink: I thank Henry Ohlsson, Lars-Erik Borge, Matz Dahlberg, Katarina Nordblom, Magnus Wikström, seminar participants at Göteborg University and Uppsala University, and two anonymous referees for useful comments. This research was financially supported by the Swedish Research Council and Ejnar Lindhs kommunalvetenskapliga stiftelse.     

Firm interdependence in oligopolistic markets

This paper develops an econometric model capable of identifying the pattern of interdependent behavior among firms in an oligopolistic industry. The model is based on the necessary conditions for producer equilibrium which, for a firm in an oligopolistic market, include the firm's conjectural variations. The conjectural variations are unknown parameters. The production model is based on the translog production function. The domestic coffee roasting industry is analyzed. Industry and size class specific Cournot and equality hypotheses are tested. Interdependent behavior cannot be rejected.     

Firm suburbanization and urban subcenters

The theory of firm location within an urban area is extended to consider a city in which firms can export their output via a suburban terminal as well as via the usual CBD terminal. Firms benefit from suburbanization since freight transport costs are reduced and since they can pay lower wages, but labor may be scarce in the suburbs. This forces suburban firms to readjust their wages, causing some workers to out-commute and giving all workers an incentive to relocate. The existence of an employment subcenter under labor scarcity conditions is shown to cause household utility levels to rise, the size of the metropolitan area to increase, and overall urban land value to change indeterminately. Finally, determination of the optimal location for a suburban terminal is considered.