Technical characteristics and efficiency of urban bus companies: The case of Spain

The aim of the present study is twofold. First, to provide new information concerning the technical characteristics of urban bus companies on the basis of a sample of medium and large-size cities in Spain. Second, to analyze the degree of efficiency of those companies and to quantify the reasons for this efficiency. The results should be useful in evaluating possible changes in public policies relating to urban transport, specifically changes in the way the market is organized and in pricing.The analysis is carried out by estimating a cost function. The sample is made up of a panel data set consisting of observations of nine Spanish companies that operated during the period 1983–1995. The specified functional form is translogarithmic. The output unit of measure adopted is bus*kms run. The cost function includes the network length for each company, thus permitting evidence concerning economies of density and economies of scale.The use of panel data allows us to estimate the cost function, taking into account that each company is affected by the specific characteristics of each individual city, the different features of the network in question and by different levels of efficiency. The economies of scale have been calculated, taking into account that the features of the network and of the city – represented by their specific individual effect – will vary with the company's level of output.Finally, an analysis is made of the relative productive efficiency of the companies, as well as of the variables likely to influence that efficiency.     

Organisation form,scale effects and efficiency in the British bus industry

The British bus industry is examined in light of fundamental reform in ownership and regulation. The industry is divided between privately and publicly owned companies, with the private sector further split between publicly listed owned subsidiaries and private limited companies. The change in ownership structure since privatization is analysed, and Data Envelopment Analysis used to estimate the extent of returns to scale and technical efficiency, as defined by one output and three inputs. Technical efficiency is further divided into managerial and organisational components, and comparisons made of median efficiency levels using a Mann Whitney statistical test.Increasing returns to scale are found for smaller companies, but the size of such returns varies with the company type. A minimum efficiency scale is identified, with constant returns above this point. A high degree of technical inefficiency is found to be present in the industry, which may initially suggest a lack of competition and reflect the oligopolistic structure that has emerged since privatisation. Privately owned companies are identified as more technically efficient, however this is due to significantly less organisational constraints, and considerable managerial inefficiency exists in this group. It is finally concluded that the high level of inefficiency may not reflect ownership, but rather industry characteristics, and rather than a lack of competition may be indicative of wasteful competition. It is suggested therefore there may be a need to make the market contestable rather than openly competitive.     

A subadditivity test for the cost function of the principal European railways

The objective of this paper is the comparison of the efficiency levels for a set of European rail companies in monopoly situations with respect to hypothetical duopoly situations. More specifically, the aim is to test whether the operating costs function of such companies is subadditive. A cost function is subadditive when a single firm can produce all relevant output vectors cheaper than two or more firms. In order to do so the test developed by Evans and Heckman (1984) will be used. It was applied for the American phone company Bell System to assess the convenience of separating the management of local and long-distance services. The results indicate that at least for the companies of a greater size, an efficiency increase (as measured by lower costs), would be obtained from the separation of the current companies in two different companies of a lower size. Besides, these efficiency gains are greater when the two new companies specialize their production, either on passenger or on freight traffic.     

Productivity,efficiency and technical change in the European railways: A non-parametric approach

The purpose of this paper is to analyse the evolution of productivity in the European railways in the period 1970–95. We use a non-parametric approach that enables changes in productivity to be broken down into variations in efficiency and technical change. The results indicate that the productivity growth is concentrated in the last period (1985–95), when the majority of the companies undertook processes of reforms. This increase in productivity is mainly due to technical progress. We also analyse the determinants of efficiency and, unlike other papers, the technical change, finding that the greater the degree of autonomy and financial independence, the higher the efficiency levels and technical change. This revised version was published online in June 2006 with corrections to the Cover Date.     

施工项目成本管理的控制方法与对策

施工企业利润空间在当前日益激烈的市场竞争中逐步缩小，因此要在不断规范的工程项目招投标中参与国际化竞争，抓好工程项目成本管理、提高项目经济效益就显得尤其重要。文章通过对施工项目成本管理的控制方法进行分析，提出施工项目成本管理对策。     

Acquisition,efficiency and scale economies: An analysis of the British bus industry

The British Bus industry has undergone considerable transformation since privatization. Five major operators have emerged to dominate the market, a position almost exclusively attained through acquisition. This paper reviews the economies of scale argument commonly cited for this change and gives an overview of the acquisition process. It questions whether this argument gives a complete explanation for this industry development. For 58 individual companies, the level of technical efficiency attributable to firms operating at or near the optimum level of output is examined over 5 years to determine if mergers in practice have resulted in scale economies. Technical efficiency is estimated using data envelopment analysis, under assumptions of constant and variable returns to scale. Efficiency scores are then regressed on a time trend and a merger dummy to test whether acquired firms' efficiency has significantly improved above the average. It was found that over the period, efficiency had improved. This improvement, however, cannot be wholly attributed to the achievement of economies of scale. More specifically, there has been an improvement in the internal efficiency of acquired firms and some scale economies within group companies, the latter of which may have resulted from the eradication of competition.     

Effects of regulation-driven green innovations on short sea shipping's environmental and economic performance

Despite its pivotal role in European trade, today’s short sea shipping (SSS) industry faces the dual challenge of lessening its environmental footprint while improving its economic performance. To reduce the pollution caused by their operations, SSS companies are required to comply with increasingly stringent environmental regulations enacted by global and regional authorities such as the European Union and the International Maritime Organization. However, the companies tend to regard those regulations as imposing an additional burden of cost that compromises their capacity to enhance their economic performance. This paper examines the impact of external institutional driver namely regulatory pressure on the adoption of green innovations in SSS and in turn, the impact of those innovations on the environmental and economic performance of SSS companies. To investigate the hypothesised relationships of those constructs, a structural equation model was developed and tested with data from a survey conducted amongst 101 short sea shipping companies headquartered in Europe. As detailed in the paper, the analysis revealed that regulatory pressure has generated green innovations that have enhanced the environmental and economic performance of European SSS companies and, as a result, led to a win–win situation for all parties involved. The paper discusses what those findings imply for SSS firm managers and policymakers who seek to improve the environmental or economic performance of Europe’s SSS industry.     

Estimating the inefficiency in the Norwegian bus industry from stochastic cost frontier models

A stochastic cost frontier function based on data from 170 of the 175 Norwegian subsidized bus companies is estimated under two alternative presumptions regarding the distribution of the inefficency among the bus operators. When the inefficiency is assumed to be half-normally distributed, the average inefficiency in the industry is estimated to be 13.7 per cent. This calculated value is nearly halved (7.2 per cent) when the exponential distribution is applied, while the ranking of the companies according to inefficiency is unchanged. By regressing the estimated inefficiency values for each company on some exogenous variables describing its ownership structure and the subsidy policy which it faces, it is seen that inefficiency of the companies which negotiate with the public authorities over the subsidy amounts is slightly higher than the inefficiency of the companies which face a subsidy policy based on cost norms. Our analysis gives, however, no significant differences in the efficiency between privately owned bus companies and publicly owned bus operators, and shows only minor economies of scale.     

CO2 emissions efficiency and marginal abatement costs of the regional transportation sectors in China

Nowadays, evaluating CO₂ emissions efficiency and its marginal abatement cost in transportation sectors has been a hot topic. However, while evaluating the CO₂ marginal abatement cost using data envelopment analysis approach, the weak disposability of CO₂ may imply positive abatement cost, which undoubtedly violates our common sense. To obtain non-positive marginal abatement cost, CO₂ emissions should be treated as an input. To reconcile this contradiction, this paper intends to propose a global, directional distance function model based on previous study to investigate the productivity, economic efficiency, CO₂ emissions efficiency, and marginal abatement cost of the China’s regional transportation sectors during 2007–2012. The results show that: (1) the productivity, economic efficiency and CO₂ emissions efficiency of different regions differ widely. More specifically, the coastal areas of south China perform better than the other areas in terms of productivity, economic efficiency, and CO₂ emissions efficiency. (2) Generally, the economic efficiency is greater than CO₂ emissions efficiency, which is relatively low in most areas. (3) A negative correlation is found between CO₂ emissions efficiency and its marginal abatement cost. For a 1% increase in CO₂ emissions efficiency, the CO₂ marginal abatement cost declines by 102 Yuan (in 2004 constant price). The results imply that improving CO₂ emissions efficiency plays an important role in marginal abatement cost reduction, and it also provides us a new approach to reduce abatement cost besides the technical progress.     

Evaluating efficiency in the Norwegian bus industry using data envelopment analysis

This paper focuses on the performance of Norwegian bus companies subsidized by the government. The performance is evaluated from a productive efficiency point of view. The framework is that of a deterministic non-parametric Data Envelopment Analysis (DEA) approach to efficiency measurement. In this context several important issues are addressed: efficiency rankings, distribution and scale properties in the bus industry, potentials for efficiency improvements in the sector, the impact of ownership, area of operation and scope, and ways of improving efficiency in the sector. The findings show that the average bus company exhibits increasing return to scale in production of its services. The extent of such returns however vary, with size and is more prevalent among smaller companies. The average bus company is found to have a considerable input saving potential of about 28 percent. Neither economies of scope nor company ownership are found to have an influence on company performance. It is suggested that geographical factors need a closer attention in future research. The implications of DEA results are discussed and concluding remarks offered.     

Incorporating negative externalities into productivity assessments of US airports

This paper analyses the efficiency of 44 US airports for the period 2005–2009. In addition to the conventional outputs (i.e., passengers, flights and cargo), we consider three undesirable externalities of airport activities: delays, noise and local air pollution. We adopt a directional distance function approach and perform a second stage analysis to investigate potential determinants of efficiency. Our base case results with only the positive outputs show that the greater the average aircraft size serving an airport and the larger the dimensions of the airport, the higher the technical efficiency. However, our results are sensitive to the inclusion of the undesirable outputs. The implications are that the inclusion of these externalities into the calculation of efficiency may impact policy decisions.     

岩沥青改性沥青混合料应用技术和效益分析

岩沥青改性剂是天然的改性剂,加工合成不会造成环境污染,而且岩沥青改性剂与普通的沥青改性剂相比造价低,因此岩沥青改性剂具有良好的经济和社会效益。本文详细介绍了岩沥青改性剂优点,并通过路面实体工程的分析,证明了岩沥青改性沥青混合料的技术性能和效益优越,是一种值得推广的路面改性剂。     

ICT Adoption among Logistics Companies in ASEAN Countries

In this era of globalization, adoption of information and communication technology (ICT) is one of the critical determinants of logistics companies' competitiveness and growth. This is especially so for the ASEAN countries as they pursue the vision of regional economic development and integration. Existing empirical studies on ICT adoption by logistics companies in developing countries are, however, scarce and have limited theoretical support and so far no comparative analysis of ICT adoption among ASEAN logistics companies and its determinants has been undertaken. This paper investigates the level of ICT adoption among ASEAN logistics companies and also develops an investment-based model to explain it. The model is evaluated with logistic regression using firm-level data collected from interviews with a sample of ASEAN logistics companies. The study finds that ICT adoption level varies significantly among the ASEAN countries and provides an empirical support for an investment-based view of ICT adoption. It also finds no further evidence for the relevance of the institutional theory to the ASEAN logistics industry. These findings have important strategic and policy implications for the ASEAN policy-makers and logistics industry.     

An application of the directional distance function with the number of accidents as an undesirable output to measure the technical efficiency of state road transport in India

By using the directional distance function (DDF) of data envelopment analysis (DEA), this study measures the technical efficiency of 37 Indian state road transport undertakings (SRTUs) for the year 2012–13. We employ the DDF as a tool for analyzing a joint production function with both desirable and undesirable outputs (i.e., the number of accidents). A comparison between the results with and without accidents shows that several SRTUs have experienced significant changes in their efficiency scores as well as in their rankings after accounting for the undesirable output. This indicates the importance of including the number of accidents – a safety standard – as representative of the undesirable output in computing the efficiency scores of SRTUs. The results of the Tobit model indicate that SRTUs with greater vehicle productivity are more efficient under both conventional DEA and DDF approaches. We also employed zero-truncated negative binomial model to assess the factors influencing the number of road accident experienced by the Indian SRTUs and found that the accident count was significantly influenced by fleet utilization and vehicle productivity.     

Transport education in Switzerland

Abstract

Transport companies are finding themselves compelled to attach growing importance to the education and further education of their staff in the face of transport's increasing complexity, of its increased market‐economic thinking where competition takes the place of collective economic thinking and of financial constraints.

The necessity for increased education and further education of the managerial staff of the transport companies has also led to a two‐fold division of this task in Switzerland: on the one side the academic education in universities, on the other the further education of the management staff by the transport companies.

The extent of education and research done on “transport” varies in Swiss universities. Special courses are given at the St. Gall Graduate School of Economics, Business and Public Administration in transport economics and at the Technical Universities of Zürich and Lausanne in transport engineering.

Special further education in transport management is given by Swissair and Swiss Federal Railways.     

A stochastic frontier model of the efficiency of major container terminals in Asia: assessing the influence of administrative and ownership structures

This paper applies a `port function matrix' to analyse the administrative and ownership structures of major container ports in Asia. The relative efficiency of these ports is then assessed using the cross-sectional and panel data versions of the `stochastic frontier model'. The estimated efficiency measures are broadly similar for the two versions of the model tested. From the results of the analysis, it is concluded that the size of a port or terminal is closely correlated with its efficiency and that some support exists for the claim that the transformation of ownership from public to private sector improves economic efficiency. While this provides some justification for the many programmes in Asian ports which aim to attract private capital into both existing and new facilities, it is also concluded that the level of market deregulation is an important intervening variable which may also exert a positive influence.     

韶山高速公路边坡防护技术研究

全灌型CF椰纤维网防护是一种成本低、效率高、效果好的新型边坡生态防护方法。文章结合湖南省韶山高速公路第一合同段路基边坡防护实践,介绍了全灌型CF椰纤维网防护技术原理、施工工艺及关键技术要求,并通过与传统边坡防护方式的比较,分析了全灌型CF椰纤维网防护技术的经济优势,为高速公路边坡绿化防护提供参考。     

Organizational and Ownership Transformation in Poland’s Urban Transport Companies

Abstract

This paper seeks to reconstruct the organizational and ownership transformation involving Poland’s urban transport that companies passed through after 1990. Data collected from various sources (above all the Internet, including the Bulletins of Public Information) were used to establish the degree of advancement of the transformation processes. Despite the passage of nearly two decades since the new economic reforms were launched, the privatization processes involving enterprises of municipal origin are not well‐advanced. There is not a single private company among the organizers of urban transport. Instead, an absolute domination of budgetary‐sphere entities may be noted. Furthermore, there are seven transport municipal unions. Among the operators (carriers) public ownership remains dominant in the form of single‐person local authority companies, local government companies, municipal union ownerships, municipal companies as well as budgetary units. Privatization processes have encompassed fewer than 10% of all operators in the form of companies with foreign participation, workers’ companies and companies with Polish non‐public sector participation. Moreover, in 20 localities urban transport is supplied by multi‐trade municipal services enterprises (as of end‐2008). Thus, transformation processes, though started earlier than in the case of Poland’s State Road Transport coach companies, are much less advanced.     

On measuring the efficiency of public enterprises: Bus operating companies in the San Francisco Bay area

It is important to be able to say whether or not an enterprise in the public sector is efficient and to measure this aspect of its performance. Public enterprises sometimes have legitimate reason to treat efficiency as secondary, but they also may resist efficiency measurement for other reasons.Statistical cost functions containing experience from similar enterprises provide useful yardsticks for public administrators. A purported cost function can be inadequate, however, as is shown in one example.Statistical cost functions allow comparison of bus properties by giving a range within which costs of an efficient property should fall. While random influences cannot be excluded, if observed costs fall outside two standard errors of prediction, there is a good case to say the property is inefficient. The usefulness of the standard error of prediciton as a measure of precision is explored.Nationally estimated cost functions were used to investigate the bus operations only of three San Francisco companies. Two were found within sampling error, one was significantly more costly on its motorbus operations than average experience in the nation. A closer look would then be in order by those funding this property. Several years' experience is explored showing changes over time as well as across companies.This material was prepared with the support of National Science Foundation Grant No. GI-37181 to the University of California. The results and views are the independent product of university research and are not necessarily concurred in by the National Science Foundation. The Institute of Urban and Regional Development at U.C. Berkeley facilitated research herein.     

城市轨道交通路网性车辆基地功能特点分析

城市轨道交通网络化运营要求整合车辆运用检修资源,提高设施设备利用率,实现资源共享。路网性车辆基地的建设是提升网络化运营效益的重要措施。本文以上海北翟路车辆基地为案例,从建设规模、建设选址、共享条件、主要工艺方案等方面,分析路网性车辆基地功能设计需求,可供类似工程借鉴与参考。