Cost efficiency of Slovenian water distribution utilities: an application of stochastic frontier methods

This study estimates cost inefficiency and economies of scale of Slovenian water distribution utilities over the 1997–2003 period by employing several different stochastic frontier methods. The results indicate that significant cost inefficiencies are present in the utilities. An introduction of incentive-based price regulation scheme might help resolve this problem. However, the inefficiency scores obtained from different cost frontier models are not found to be robust. The levels of inefficiency estimates as well as the rankings depend on the econometric specification of the model. The established lack of robustness can be at least partly explained by different ability of the models to separate unobserved heterogeneity from inefficiency. Newly proposed true fixed effects model (Greene, J Econom 126:269–303, 2005; J Prod Anal 23(1):7–32, 2005) appears to perform better than the conventional panel data models with respect to distinguishing between unobserved heterogeneity and inefficiency. On the other hand, different models produce fairly robust results with respect to estimates of economies of output density, customer density and economies of scale. The optimal size of a company is found to closely corresponds to the sample median. Economies of scale are found in small-sized utilities, while large companies exhibit diseconomies of scale.

Measures in DEA with an Application to the Malmquist Index

This paper shows the importance of goal vectors G in measuring and dealing with DEA inefficiencies. It emphasizes the advantages of the family of additive relative to the traditional oriented DEA models and shifts the primary emphasis to measuring inefficiency rather than efficiency. This new (raw) inefficiency measure RIN incorporates both the traditional DEA efficiency and the DEA slacks and provides the background for a new approach to the Malmquist Index. The final section points out some deficiencies in existing computational procedures for selecting G and calls for continued research on the selection process, as well as showing a role for G in returns to scale studies.     

Decomposing profit change: Konüs,Bennet and Luenberger indicators

We introduce complementary decompositions of profit change that, relying on the duality between the profit function and the directional distance function, shed light on the different sources of profit growth including measures of technical efficiency, allocative efficiency and technological change. Our decompositions extend the literature on Konüs and Bennet quantity and price indicators to profit change. The first decomposition is ‘exact’ in the sense of Diewert, by completely exhausting the sources of profit change into profit inefficiency change (including technical and allocative inefficiency change), technological change, and output and input price change. The second decomposition equates the Bennet quantity indicator to a productivity measure represented by the Luenberger indicator plus allocative inefficiency change. We deem it ‘complete’ because in contrast to the existing literature, it retains the information on allocative inefficiency change while preventing the existence of residual terms capturing price variations, whose meaningful interpretation has not been addressed until now. Our proposed solution takes advantage of the flexibility of the directional distance function when choosing a suitable directional vector. All decompositions have the same structural form and therefore their components can be compared to each other vis-à-vis, providing alternative measures of equivalent sources of profit growth.     

Measuring entrepreneurship at the country level: A review and research agenda

The measurement of entrepreneurial activity across national contexts is a relatively recent and under-represented area of study. There was very little research carried out for comparable indicators of entrepreneurship until the end of the 1990s, when the Global Entrepreneurship Monitor Consortium launched its annual surveys. In the last decade, other indexes and databases have been created, such as the EIM COMPENDIA database and the World Bank Group Entrepreneurship Survey dataset. The first objective of this paper is to review and analyse the existing entrepreneurship indexes with respect to their conceptual and methodological dimensions. This review shows that the conceptual foundations of most of the indexes are insufficiently developed. The second objective is to integrate and compare the indexes on 21 Organization for Economic Co-operation and Development countries for which complete data is available. Strong convergence was found between the indicators of venture creation, business ownership and growth, while noticeable divergences were observed between these indicators and those concerning innovation. This was further explored through cluster analysis, which indicated that the 21 sampled countries could be classified into three distinct entrepreneurial profiles. The paper concludes by offering research directions and debating the use of unitary or composite measures of entrepreneurship in comparison to the analysis of multiple dimensions as exemplified in this paper.     

Employee firing costs and accounting conservatism: Evidence from wrongful discharge laws

This paper identifies the causal effect of a firm's employee firing costs on its conditional conservatism, using the staggered adoption of US state wrongful discharge laws (WDLs) that increase a firm's cost of firing employees. We find that the adoption of WDLs leads to a significant increase in conditional conservatism. This result is greater for firms that are more labor-intensive, have higher propensities to fire employees, make more firm-specific investments and have greater risk. Overall, our findings support the view that higher firing costs lead to greater demand for conditional conservatism to decrease investment inefficiencies because higher firing costs make inefficient investments (including overinvestment in negative-net present value (NPV) projects and delays in disinvesting poorly performing projects) costlier for the firm.     

Unpredicted costly dividends and temporary short squeezes

We argue that cash dividend is a type of arbitraging cost that short sellers tend to avoid. We find that dividend announcements lead to temporary short squeezes, causing the prices of highly shorted stocks to overshoot and fully revert over time. These stocks also experience excessive buy-initiated trades and abnormal trading volume in response to dividend announcements. These results are driven mainly by stocks with unpredicted dividends, low lending fees, and high dividend yields. Overall, results suggest that news of a dividend distribution is magnified by short squeezes due to increased short costs and generates excessive nonfundamentals-driven price fluctuations.     

建立现代产权制度,解决消费需求不足

产权制度经历了从古典产权制度到现代产权制度的演进.受古典产权制度的制约,我国劳动力市场所具有的两个特点决定了工资的市场定价必然将工资定位在低点,它导致了相当一部分就业人口长期的低收入,从而产生收入分配差距偏大和总消费需求不足.因此,必须建立现代产权制度,才能够解决收入分配差距偏大和总消费需求不足的问题.现代产权制度是构建和谐社会的经济基础.     

Human capital effects on technical inefficiency: a stochastic frontier analysis across industries of the Greek economy

In this paper we examine the impact of human capital on technical inefficiency. A stochastic production frontier is simultaneously estimated with a technical inefficiency model using data from one-digit industries of the Greek economy, for the period 2000–2005. The results indicate a significantly negative impact of human capital on technical inefficiency, which is comparatively lower in magnitude for the sector of public services. The most efficient industries of the Greek economy are those of Education, Financial intermediation and Real estate, renting & business activities. The highest contribution of human capital on technical efficiency is observed in the industries of Health, Education and Real estate, renting & business activities.     

业务流程的失效分析

业务流程不仅是一个技术一经济系统,还是一个具有社会性的复杂动态系统。在此基础上．在分析业务流程失效原因．包括业务流程的内、外部环境．业务流程的要素和业务流程的结构等方面。在流程变革之前进行流程失效分析是至关重要的,它可以防止单纯依靠的流程技术分析工具可能导致的纯技术模式缺陷．避免过度强调流程变革的方法论．