A Simple Economic Model For The Selection Of The Optimum Method of Leakage Control

1988 ◽  
Vol 13 (2) ◽  
pp. 92-97 ◽  
Author(s):  
A. Valerio Di Michele ◽  
Harry J. Giles ◽  
Wanchai Ghooprasert
2020 ◽  
Author(s):  
Maxim Gusev ◽  
Dimitri Kroujiline

2018 ◽  
Vol 10 (8) ◽  
pp. 2625 ◽  
Author(s):  
Tiago Sequeira ◽  
Marcelo Santos

The ratio of energy use to Gross Domestic Product (defined as energy intensity) is a major determinant of environmental hazard and an indicator of eco-efficiency. This paper explains why education can have an effect in reducing the energy intensity thus affecting eco-efficiency. We devise a stylized economic model with simple and widely accepted assumptions that highlights the role of education in decreasing energy intensity worldwide. In an empirical application that is robust to the features of the data, we show that primary schooling contributes to a decrease in energy intensity which has a very significant effect, even accounting for the other well-known determinants of energy intensity. Additionally, when schooling is taken into account, income is no longer a negative determinant of energy intensity.


2020 ◽  
Vol 12 (17) ◽  
pp. 6819
Author(s):  
Horațiu Vermeșan ◽  
Alexandrina Mangău ◽  
Ancuța-Elena Tiuc

The circular economy (CE) is a popular concept in the European Union (EU) space, which has been the subject of numerous research and substantiation activities. In the last years, there has been a growing interest in Romania regarding the characteristics of this new economic model and the principles on which it works. Referring to Romanian specialized literature currently available regarding the submitted topic, we consider that the theoretical part is insufficiently structured. In addition, by pointing out the applicability of the circular economy in Romanian space, we consider this to be represented mainly by the fragility of its effective and practical implementation. The examples of Romanian successes in the field of circular economy are limited, a fact that can be explained—from our perspective—through the aspect that in other EU countries, the process of development of CE has some precedents, a stronger background and a ”self-constructed” history in the topic. There is undoubtedly a necessity for adopting this new economic model, considering that, for the most part, Romanian economy is still dependent on the linear economic system. Starting from these arguments, the proposed article uses a thematic debate of the notion of circular economy, presenting, at the beginning, an incursion into the predominantly European variety of theoretical approaches. The selection of definitions and conceptualization is continued with an analysis of the stage of implementation of CE in Romania. The purpose of this approach is to investigate a niche identified in the Romanian space, not covered in the specialized scientific research and to expose the specificity of the process of transition of Romania to a circular economy, of the barriers encountered—namely, the problem related to the attitude and mentality regarding this new concept. We also point out that the intention of the study is to integrate a ”different” contemporary and very current economic concept into a real economy, and at the same time, to increase the visibility of its application at the level of a member country of the EU. The challenges encountered in the context of the increasingly present tendency in Romania of assimilating and complying with the precepts of the circular economy are also detailed, proposing, at the end of the study suggestions for improving the gaps identified at this level. The most realistic implementation of the circular model in Romania represents a qualitative plus for the human-society factor, as well as for the environment. In conclusion, we note that, despite the evolution of the number of theoretical approaches and concerns, the field of circular economy and the perspectives it proposes, continues to offer a favorable ground for further research.


2020 ◽  
Vol 135 (2) ◽  
pp. 785-843 ◽  
Author(s):  
Amitabh Chandra ◽  
Douglas O Staiger

Abstract In medicine, the reasons for variation in treatment rates across hospitals serving similar patients are not well understood. Some interpret this variation as unwarranted and push standardization of care as a way of reducing allocative inefficiency. An alternative interpretation is that hospitals with greater expertise in a treatment use it more because of their comparative advantage, suggesting that standardization is misguided. A simple economic model provides an empirical framework to separate these explanations. Estimating this model with data for heart attack patients, we find evidence of substantial variation across hospitals in allocative inefficiency and comparative advantage, with most hospitals overusing treatment in part because of incorrect beliefs about their comparative advantage. A stylized welfare calculation suggests that eliminating allocative inefficiency would increase the total benefits from the treatment that we study by 44%.


2015 ◽  
Vol 155 (1) ◽  
pp. 140-148 ◽  
Author(s):  
Jason Potts ◽  
Stuart Thomas

This article examines the effect of technological change (innovation) on sports. We argue that innovation affects a sport through two pathways: sports equipment and sports media. We propose a simple economic model with positive feedback, which predicts that technology-enhanced sports will dominate the sports ecology. There is also the opposite phenomenon of technological overshooting that causes the elite end of a sport to develop much faster than the beginner's end, damaging entry into the sport. We present this model through a case study on windsurfing, illustrating the role of sports media. A surprising result is that the case study suggests a welfare-maximising case for monopoly licensing of sports media in newly emerging sports, or sports with rapidly changing equipment technologies.


2021 ◽  
pp. 1-28
Author(s):  
Brendan K. Beare ◽  
Won-Ki Seo ◽  
Alexis Akira Toda

This article concerns the tail probabilities of a light-tailed Markov-modulated Lévy process stopped at a state-dependent Poisson rate. The tails are shown to decay exponentially at rates given by the unique positive and negative roots of the spectral abscissa of a certain matrix-valued function. We illustrate the use of our results with an application to the stationary distribution of wealth in a simple economic model in which agents with constant absolute risk aversion are subject to random mortality and income fluctuation.


2009 ◽  
Vol 29 (8-9) ◽  
pp. 1440-1446 ◽  
Author(s):  
Dejan Ivezić ◽  
Marija Živković ◽  
Toma Tanasković ◽  
Nenad Đajić

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