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The purpose of this paper is to carry out an analysis of Italian water utility companies to determine whether their performance was related to certain relevant variables that have been broadly discussed in the existing literature. Among these are ownership structure, size and diversification. In addition, the paper considers another variable – the geographical location.

The paper reviewed the annual financial statements of 80 Italian water utility companies between 2004 and 2008. It also obtained data regarding tariffs, volumes supplied and population served from Conviri, the Italian national authority for water. Finally, the paper discusses the significant differences among clusters, using parametric statistic methods.

It was found that ownership structure, size, diversification and geographical location had an impact on the performance of water utility companies, although with different degrees of significance.

Further studies are necessary in order to improve the way that performance of water utilities is assessed. First of all, it might be helpful to improve our data categories, adding financial data, tariffs, volumes supplied and population served for more than one year and obtaining segmental reports for multi‐utilities. In addition, it would be interesting to apply other methods, such as DEA analysis, to confirm our research findings.

For a local authority it is convenient to entrust water services to publicly owned companies because they apply lower tariffs and make higher investments pro capita on the pipe network. Moreover, since economies of scale and scope exist, a company's growth and diversification should be encouraged.

In Italy the water industry is currently the focus of a vast political debate. As a matter of fact, a recent law (n. 133/2008 article 23‐bis modified in November 2009) encourages private administration of this industry. The results led to an improvement in the debate on the strategic choices and organizational structure of water utilities, giving helpful suggestions to policy makers and local authorities for developing future strategies.

The research findings improve the existing literature on performance assessment regarding water utilities, for the first time focusing on the Italian context, where companies with different features coexist: public and private utilities, small, medium and large companies as well as mono and multi‐utilities.

This paper aims to provide an in-depth evaluation of how German and Austrian utilities use Facebook to engage stakeholders, including a look at the objectives pursued with the use of Facebook, addressed stakeholders as well as the provided information. German and Austrian utility companies are confronted with serious changes in the European energy sector. In this context, stakeholder theory emphasises the importance for utility companies to actively manage the relationships with the relevant stakeholders. Nowadays, a considerable number of these stakeholders might be addressed by using Facebook.

The quantitative study includes 88 German and Austrian utility companies.

Research findings indicate that Facebook is a common instrument in the German and Austrian energy sectors. It seems that so far, no real stakeholder dialogue has been achieved. Moreover, issues which deeply affect a wide variety of citizens are not emphasised on most Facebook accounts. Therefore, so far, the majority of utilities is not using the full potential of Facebook.

By developing a process of agenda-setting driven by social media, the paper contributes to the existing literature and gives practical implications for public and private entities in the energy sector.

German, Austrian and Swiss utilities are confronted with radical changes in the European energy sector. A dialogue between the utility companies and their various groups of stakeholders is gaining importance. Increasingly, utilities create their own Facebook presence enabling such a dialogue. Still, to the best of the author’s knowledge there exists no research which explicitly focuses the stakeholder dialogue of German, Austrian or Swiss utilities on Facebook. Therefore, the purpose of this paper is to analyse Facebook as an instrument for dialogic communication in the energy sector.

An online survey was distributed to 1,280 German, Austrian and Swiss utilities, and 14 per cent of the utilities completed the survey, including 130 German, 19 Austrian and 25 Swiss companies. The participating utilities are primarily in public ownership.

The Facebook conversation of utility companies and their stakeholders meets the basic requirements of a virtual stakeholder dialogue. Nevertheless, less than half of the companies perceive their current stakeholder conversation on Facebook as truly interactive. Therefore, even if the basic requirements of a dialogue are met, most companies still do not seem to fully use the dialogue potential of Facebook.

This study provides first insights into virtual stakeholder dialogues in the energy sector. A suggestion to operationalise such a virtual dialogue is provided. Both operationalisation as well as the empirical results help researchers and practitioners to better understand virtual stakeholder dialogues.

This paper examines both theoretically and empirically the application of utility theory to downsizing decisions. It is shown that residual efficiency after downsizing can differ greatly, depending on whether a company uses a headcount, utility or payroll reduction and that the correlations among employee age/period of job tenure, individual utility and salary all contribute to these differences. Companies are often restricted by legal and ethical considerations when deciding who will leave during downsizing. Using the above conceptual framework it is shown that companies can determine a financial break‐even point where it would be worthwhile to offer some categories of employees a severance package in order to have freedom of action during downsizing. Data are used from an empirical study of a large financial services company to illustrate the practical application of the model. It is concluded that only limited amounts of information in addition to that normally available to HR managers is required in order to apply the models developed in this study and that utility theory can make a valuable contribution to decision‐making in the downsizing process.

The authors consider the mutual benefits of the ceding company and reinsurance company in the design of reinsurance contracts. Two objective functions to maximize social expected utilities are established, which are to maximize the sum of the expected utilities of both the ceding company and reinsurance company, and to maximize their products. The first objective function, additive, emphasizes the total gains of both parties, while the second, multiplicative, accounts for the degree of substitution of gains of one party through the loss of the other party. The optimal price and retention of reinsurance are found by a grid search method, and numerical analysis is conducted. The results indicate that the optimal solutions for two objective functions are quite different. However, optimal solutions are sensitive to the change of the means and volatilities of the claim loss for both objective functions. The results are potentially valuable to insurance regulators and government entities acting as reinsurers of last resort.

In this paper, the authors apply relatively simple, but in the view significant, methods and models to discuss the optimization of excess loss reinsurance strategy. The authors only consider the influence of loss distribution on optimal retention and reinsurance price but neglect the investment factor. The authors also consider the benefits of both ceding company and reinsurance company to determine optimal premium and retention of reinsurance jointly based on maximizing social utility: the sum (or the product) of expected utilities of reinsurance company and ceding company. The authors solve for optimal solutions numerically, applying simulation.

This paper establishes two optimization models of excess-of-loss reinsurance contract against catastrophic losses to determine optimal premium and retention. One model considers the sum of the expected utilities of a ceding company and a reinsurance company's expected utility; another considers the product of them. With an example, the authors find the optimal solutions of premium and retention of excess loss reinsurance. Finally, the authors carry out the sensitivity analysis. The results show that increasing the means and the volatilities of claim loss will increase the optimal retention and premium. For objective function I, increasing the coefficients of risk aversion of or reducing the coefficients of risk aversion of will make the optimal retention reduced but the optimal premium increased, and vice versa. However, for objective function 2, the change of coefficient of risk aversion has no effect on optimal solutions.

Utility of the two partners: The ceding company and the reinsurance company, may have different weights and different significance. The authors have not studied their relative significance. The simulation approach in numerical methods limits us to the probability distributions and stochastic processes the authors use, based on, generally speaking, lognormal models of rates of return. This may need to be generalized to other returns, including possible models of shocks through jump processes.

In the recent two decades, reinsurance companies have played a great role in hedging mega-catastrophic losses. For example, reinsurance companies (and special loss sharing arrangements) paid as much as two-thirds of the insured losses for the September 11, 2001 tragedy. Furthermore, large catastrophic events have increased the role of governments and regulators as reinsurers of last resort. The authors hope that the authors provide guidance for possible balancing of the needs of two counterparties to reinsurance contracts.

Nearly all governments around the world are engaged in regulation of insurance and reinsurance, and some are reinsurers themselves. The authors provide guidance for them in these activities.

The authors believe this paper to be a completely new and original contribution in the area, by providing models for balancing the utility to the ceding insurance company and the reinsurance company.

我們探討分出公司和再保險公司在再保險合約的設計上、如何能達至互利互惠。研究確立了兩個目標函數，分別為把分出公司和再保險公司兩者之預期效用的總和最大化，以及把它們的產品最佳化。第一個目標函數是加法的，強調兩個參與方的總增益;而第二個目標函數則是乘法的，這個目標函數，闡釋參與方因另一方虧損而有所收益之取代度。再保險的最佳價格和自留額是利用網格搜索法找出的，數值分析也予以進行。研究結果顯示，兩個目標函數的最佳解決方案甚為不同。唯最佳解決方案會對就這兩個目標函數而言的追討損失的波動、以及其平均值之改變產生敏感反應。研究結果將會見其價值於作為在萬不得已的時候的再保險人的保險業規管機構和政府實體。

在這學術論文裡，我們採用了相對簡單、但我們認為是重要的方法和模型，來探討超額賠款再保險策略的優化課題。我們只考慮虧損分佈對最佳自留額和再保險價格的影響，而不去檢視投資因素。我們亦考慮對分出公司和再保險公司兩者的利益，來釐定最佳保費和再保險的自留額，而這兩者則共同建基於把社會效益最大化之上：再保險公司和分出公司的預期效益的總和 (或其積數) 。 我們採用類比模仿方法、來解決尋求在數字上最佳解決方案的問題。

本研究建立了就應對嚴重虧損而設的兩個超額賠款再保險合約的優化模型，來釐定最佳的保費和自留額。其中一個模型考慮了分出公司和再保險公司兩者各自的預期效益的總和。另外的一個模型則考慮了兩者的預期效益的積數。透過例子，我們找到了保費和超額虧損再保險自留額的最佳解決方案。最後，我們進行了敏感度分析。研究結果顯示、若增加追討損失的平均值和波動，則最佳自留額和保費也會隨之而增加。就第一個目標函數而言，若增加風險規避係數、或減少這個係數，則最佳自留額會隨之而減少，但最佳保費卻會隨之而增加，反之亦然。唯就第二個目標函數而言，風險規避係數的改變，對最佳解決方案是沒有影響的。

• – 有關的兩個夥伴之效用性：分出公司和再保險公司或有不同的份量和重要性。我們沒有探討兩者的相對重要性。

• – 我們以數值方法為核心的類比模仿研究法、使我們局限於機率分配和一般而言建基於投資報酬率對數常態模型之隨機過程的使用。我們或許需要調節研究法。以能概括其它回報收益，包括透過跳躍過程而可能達至之沖擊模型。

– 有關的兩個夥伴之效用性：分出公司和再保險公司或有不同的份量和重要性。我們沒有探討兩者的相對重要性。

– 我們以數值方法為核心的類比模仿研究法、使我們局限於機率分配和一般而言建基於投資報酬率對數常態模型之隨機過程的使用。我們或許需要調節研究法。以能概括其它回報收益，包括透過跳躍過程而可能達至之沖擊模型。

在過去20年裡，再保險公司在控制極嚴重災難性的損失上曾扮演重要的角色。例如、再保險公司 (以及特殊的損失分擔安排) 為了2001年9月11日的災難事件而支付多至保險損失的三分之二的費用。而且，重大的災難性事件使政府及作為最後出路再保險人的調控者得扮演更重要的角色。我們希望研究結果能為再保險合約兩對手提供指導，以平衡雙方的需要。

全球差不多每個政府都參與保險和再保險的管理工作，有部份更加本身就是再保險人。研究結果為他們的管理工作提供了指導。

我們相信本學術論文、提供了平衡分出保險公司和再保險公司效用性的模型，就此而言，本論文在相關的領域上作出了全新和獨創性的貢獻。

A monopolistic relationship between utilities and their customers creates a unique relational context in which the basic assumption of one's ability to terminate a relationship with an unsatisfactory relationship partner is violated. The purpose of this paper is to examine how attitudinal and behavioral outcomes are influenced by relational gap as the discrepancy between the expected relationships under deregulation and the experienced public relationships under monopolistic completion.

With this purpose, an online survey was conducted with customers of a monopolistic utility provider; a sample of 1,145 adults living in the region was provided from an academic online panel database project for research participants, yielding a response rate of 32 percent.

The key findings are that, among the four relational outcomes, control mutuality and satisfaction showed the biggest and significant shift to higher levels of performance expectations under competition than under a monopoly. Further, a shift in control mutuality and satisfaction led to more negative attitudes toward the company and a stronger intention to switch.

This study can contribute to the practice and study of communication management by suggesting a sound empirical framework in managing public relationships.

The purpose of this paper is to seek an efficient method to tackle the energy provision problem for smart grid with sparse constraints and distributed energy and storage devices.

A complex smart grid is first studied, in which sparse constraints and the complex make-up of different energy consumption due to the integration of distributed energy and storage devices and the emergence of multisellers are discussed. Then, a real-time pricing scheme is formulated to tackle the demand response based on sparse bilevel programming. And then, a bilevel genetic algorithm (BGA) is further designed. Finally, simulations are conducted to evaluate the performance of the proposed approach.

The considered situation is widespread in practice, and meanwhile, the other cases including traditional model without the sparse constraints can be seen as its extensions. The BGA based on sparse bilevel programming has advantages of “no need of convexity of the model.” Moreover, it is feasible without the need to disclose the private information to others; therefore, privacies are protected and system scalability is kept. Simulation results validate the proposed approach has good performance in maximizing social welfare and balancing system energy distribution.

In this paper, the authors consider the sparse constraints due to the fact that each user can only choose limited utility companies per time slot. In reality, there exist some other sparse cases, which deserve further study in the future.

To the best of the authors’ knowledge, this is one of the very first studies to address pricing problems for the smart grid with consideration of sparse constraints and integration of distributed energy and storage devices.

We examine the sources of performance for a sample of mutual funds that invest primarily in utility companies. Given recent deregulation developments in the utility industry and the sub‐market performance of utility stocks in the 1990s, we hypothesize that utility funds may be considering alternatives to traditional high‐yielding electric utility stocks. Although there is anecdotal evidence that utility funds may be tilting their focus away from electric utility stocks, we find that utility mutual funds as a group are no more or less heavily invested in utility stocks today than they have been over the past 10 years.

The paper seeks to examine the evolution of regulatory accounting within the context of the Brazilian electricity sector reforms. The paper traces the process of the reforms and the development of the regulatory accounting system.

The paper is based on data collected from various documents including those published by the regulator (such as laws, resolutions and technical notes), as well as information from distribution companies and other government agencies.

It is found that regulatory accounting played different roles under the different electricity sector reforms implemented in Brazil. For example, regulatory accounting was minimally used during the first reform, and this brought a range of problems of implementation and consolidation of the electricity sector model. However, regulatory accounting played an essential role in the regulatory framework under the second reform, and this in part contributed to addressing some of the problems of the sector.

This is the first study that describes and explains the Brazilian electricity sector reforms by analysing the so‐called core issues in regulatory accounting and tariff review process. The paper contributes to the literature by providing a broader picture of the interconnection between regulatory accounting and the regulator's objectives.

This study aims to test and analyze the effect of maintenance operation, time utility and occupancy on sustainability with transit oriented development (TOD) as a moderating variable.

This research is a quantitative research. The data in this study are a combination of primary data obtained through a questionnaire. The research took place at PT MRT Jakarta with all the board of directors as a sample in this study. The sampling technique used is saturated sampling and data analysis using structural equation model (SEM).

The result shows that maintenance and operation (M&O) have a positive and significant effect on time utility, M&O have a positive and significant effect on sustainability, time utility has a positive and significant effect on occupancy, occupancy has a positive and significant effect on sustainability and the influence of TOD does not significantly influence the relationship between time utility on occupancy and occupancy on sustainability.

The originality of this research lies in testing the maintenance operation, time utility and occupancy variables on sustainability with the renewal of TOD as a moderating variable.