Felder S.,University of Duisburg - Essen |
Werblow A.,University of Business and Technology |
Zweifel P.,University of Zürich
Journal of Health Economics | Year: 2010
Studies on the effect of ageing on health care expenditure (HCE) have revealed the importance of controlling for time-to-death (TTD). These studies, however, are subject to possible endogeneity if HCE influences the remaining life expectancy. This paper introduces a 10-year observation period on monthly HCE, socioeconomic characteristics and survivor status to first predict TTD and then use the predicted values as an instrument in the regression for HCE. While exogeneity of TTD has to be rejected, core results concerning the role of TTD rather than age as a determinant of HCE (the 'red herring' hypothesis) are confirmed. © 2009 Elsevier B.V.
Wand R.,University of Business and Technology |
Leuthold F.,Economy Energy
Applied Energy | Year: 2011
This paper examines the potential effects of Germany's feed-in tariff policy for small roof-top solar PV systems installed between 2009 and 2030. Employing a partial equilibrium approach, we evaluate the policy by weighing the benefits from induced learning and avoided environmental externalities against the social costs of promoting residential PV. We use a dynamic optimization model that maximizes social welfare by accounting for learning-by-doing, technology diffusion, and yield-dependent demand. We find a wide range of effects on welfare, from net social costs of 2014. million. € under a " business as usual" scenario to 7586. million. € of net benefits under the positive prospects of PV's development. Whereas the " business as usual" scenario underestimates actual price reductions, the positive scenario mirrors recent price developments and feed-in tariffs in the German residential PV market. © 2011 Elsevier Ltd.
Tseng M.-L.,University of Business and Technology |
Chiu A.S.F.,De La Salle University - Manila
Journal of Cleaner Production | Year: 2013
There has been an increasing interest towards firms' environmental sustainability activities to improve practices in their supply chain. Stringent environmental regulations in Europe and US challenge manufacturers to comply with these without losing their competitiveness. This study illustrates the case of a printed circuit board manufacturer in Taiwan that seeks to implement green supply chain management (GSCM) and selects a green supplier to meet its requirements. Choosing the suitable supplier is a key strategic direction in eliminating environmental impact on supply chain management for manufacturing firms. The firm's criteria and supplier selection need to be unified as a system to improve the firm's performance. This study identified the appropriate environmental and non-environmental GSCM criteria for the case firm and developed the following selection method: (i) evaluate the weights of criteria and alternatives as described both by qualitative and quantitative information; and (ii) rank alternative suppliers using a grey relational analysis. The result shows Alternative 3 ranks first among the four evaluated suppliers and demonstrated strong performance in the top three important criteria, namely, environmental management systems, profitability of supplier and relationship supplier closeness. Additionally, the perception weights on criteria itself are same as the most top five in weighted alternative. © 2010 Elsevier Ltd. All rights reserved.
Mansour M.,University of Business and Technology
Safety Science | Year: 2016
Undoubtedly, no specific method exists to measure the cost of displeasure among employees due to unpleasant or non-ergonomic work conditions. Despite the financial impact of these hidden costs on organizations' performance, these types of expenses are usually ignored. The intangible costs are insubstantial and represent expenses that have no common quantity or labeled value attached to them. Estimating intangible costs related to work conditions based on stress level among employees is a technique that attempts to formulize a multidimensional relationship between input qualitative variables related to the state of work conditions or work injuries and the monetary value of the hidden costs encountered with them. This technique approaches the problem from a unique standpoint, revealing the concealed effect of the state of disorder of the production system and the stress level among employees that impact the overall efficiency. In addition, the influence of the stress level on the invisible costs of the optimal amount of labor and capital due to reduced ergonomic work conditions will be investigated over both the short run and the long run. Finally, the effect of work conditions on profit-cost-volume and the breakeven quantity will be formulated. © 2015 Elsevier Ltd.
Cheng A.-C.,University of Business and Technology
Technovation | Year: 2012
New technologies have been recognized as key drivers for corporate profitability and growth in todays fast changing environments, especially in new materials field. However, little has been done in discussing the technology diffusion on the topic of new materials. In this study, we investigate the diffusion of advanced ceramic powders technology using patent citation data. We also adopt the sales data of the advanced ceramic powders for measuring the new material diffusion. At last we analyze the relationship between technology diffusion and material diffusion through the Bass diffusion model. The results show that the diffusion of technology through patent citation could be successfully explained by empirical analysis for which the Bass diffusion model was adopted. Furthermore, we can find out if technology diffusion can be the leading indicator of a new materials diffusion before its launching which is before the commercialization of the patent. © 2011 Elsevier Ltd. All rights reserved.
Tseng M.-L.,University of Business and Technology
Applied Soft Computing Journal | Year: 2011
This study proposes a combined fuzzy Technique for Order Performance by Similarity to Ideal Solution (TOPSIS) and the Decision Making Trial and Evaluation Laboratory (DEMATEL) method using linguistic preference to deal with this study objective. This study is aimed to evaluate service quality expectation in hot spring hotel's ranking problem. This criteria ranking might be a key strategic direction of the hot spring hotels. The solving procedure is as follows, (i) the weights of criteria are described in linguistic preferences with triangular fuzzy numbers; (ii) using TOPSIS to result the ranking order for all alternatives; (iii) using DEMATEL to resolving criteria interdependency relationships weights and combine into TOPSIS method; (iv) an empirical example of hot spring hotels ranking problem to resolve with this hybrid method approach and indicates that hot spring hotel S2 (L.J. hot spring hotel) is the best selection in terms of a set of criteria. The managerial implications and conclusions are discussed. © 2011 Elsevier B.V. All rights reserved.
Tseng M.-L.,University of Business and Technology
Applied Soft Computing Journal | Year: 2011
As firms move toward environmental sustainability, management must extend managements efforts to improve environmental practices across the supply chain. The selection of a suitable green supplier according to green supply chain management criteria (GSCM) is essential for the sustainable development of manufacturing firms. The objective of this study was to select an optimal alternative in the presence of incomplete information and linguistic preferences using multiple GSCM criteria. The goal of GSCM is to reduce a firm's pollution and other environmental impacts. In the proposed method, the weights of GSCM criteria and alternatives are described using linguistic preferences that can be resolved with fuzzy set theory. Subsequently, the rank of each alternative was calculated from incomplete information by applying a grey degree. Moreover, a case study was used to resolve the proposed method, and the results and managerial implications of the analysis are discussed in detail. © 2011 Elsevier B.V. All rights reserved.
Abrell J.,University of Business and Technology
Transportation Research Part D: Transport and Environment | Year: 2010
This paper analyzes the use of market-based emission regulation instruments to address the carbon dioxide emissions of transportation. Simulations with a static multi-region computable general equilibrium model show that including transportation into the European emission trading system is superior to a closed emission trading system for transportation or a tax-based approach. Furthermore, we show that exempting transportation from emission regulation is the most favorable approach in terms of welfare. This counterintuitive result is due to a large tax-interaction effect caused by high pre-existing fuel taxes in the transport sector. © 2010 Elsevier Ltd.
Bonney W.,University of Business and Technology
HEALTHINF 2012 - Proceedings of the International Conference on Health Informatics | Year: 2012
The introduction of Electronic Medical Record (EMR) systems in the healthcare industry has brought anticipation as to whether the use of the system is enabling or constraining healthcare providers' efforts in providing efficient healthcare services and evidence-based practice. Although few EMR systems have managed to achieve success in the healthcare industry, many have failed to meet the expectations of healthcare providers and the general public. In this paper, a literature review was used to explore the possible trends or factors which may help future electronic medical record initiatives achieve greater success and less failure. The practical and research implications for implementing successful EMR initiatives are also discussed.
University of Business and Technology | Date: 2010-05-13
A method for producing a fuel or fuel additive comprising providing a reaction mixture comprising oil and an alcohol in an oil-in-alcohol emulsion and a catalyst for converting the oil to the fuel or the fuel additive. The oil and the alcohol are reacted in the presence of the catalyst, at a concentration below that used in a conventional batch process, to produce the fuel or fuel additive. This low level of catalyst reduces the formation of diols and oxidation products that can diminish the quality of the fuel or fuel additive. The fuel or fuel additive produced is continuously removed during the reaction, effectively de-coupling the concentration of catalyst used from the rate of the two phase reaction.