• مطالعات اقتصادی مرتبط با حاملهای انرژی (فسیلی، تجدیدپذیر و برق)
Teimor Mohammadi; Azam Abbas Mohsen
Abstract
Energy is a fundamental input in production, and its availability and use are essential for the social, economic, and technological advancement of a nation. Energy consumption and greenhouse gas emissions have been increasing along with rising production, primarily sourced from non-renewable resources. ...
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Energy is a fundamental input in production, and its availability and use are essential for the social, economic, and technological advancement of a nation. Energy consumption and greenhouse gas emissions have been increasing along with rising production, primarily sourced from non-renewable resources. The increase in production and economic development has led to higher greenhouse gas emissions, resulting in climate change, which poses a new challenge for countries. Energy efficiency is the most beneficial way to reduce greenhouse gases and control energy supply. In this regard, one of the responsibilities of governments is to find tools to minimize the national economy's energy efficiency gap by increasing energy efficiency within the economy.For this purpose, in this study, we used the Shephard energy distance function to define the energy efficiency index and the stochastic frontier analysis technique to estimate the energy efficiency gap in selected oil and gas producing countries from 1990 to 2022. We examined some factors influencing the energy efficiency gap and observed that the energy efficiency gap increased from 6% to 29% during the years under review. Additionally, foreign direct investment and total factor productivity have a negative impact, while urbanization has a positive impact on the energy efficiency gap.
• مطالعات اقتصادی مرتبط با حاملهای انرژی (فسیلی، تجدیدپذیر و برق)
Mohsen Pourebadollahan Covich; Elham Nobahar; Sakineh Sojoodi; Reza Khalafi
Abstract
In analyzing the efficiency of electricity distribution companies, according to the economies of scale hypothesis, due to the existence of natural monopoly properties, larger firms are expected to be technically more efficient (ceteris paribus). To investigate this issue, this study assessed the technical ...
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In analyzing the efficiency of electricity distribution companies, according to the economies of scale hypothesis, due to the existence of natural monopoly properties, larger firms are expected to be technically more efficient (ceteris paribus). To investigate this issue, this study assessed the technical efficiency, economies of scale, and economies of scope of Iranian electricity distribution companies during 2011-2017 and examined their relationship with company size. For this purpose, the stochastic frontier analysis technique and the input distance function approach were used. The results show that technical efficiency first decreases and then increases with increasing company size. The results also show that economies of scale are present in most companies, although the use of economies of scale decreases as company size increases. Finally, economies of scope were observed in all the companies studied, and their magnitude decreases as company size increases. Therefore, it can be said that the hypothesis of economies of scale implying higher technical efficiency of larger companies, is not confirmed, although the necessary condition for the establishment of a natural monopoly is present in Iranian electricity distribution companies
Ahmed Seifi; Mustafa Salimifar Salimifar; Haniyeh Fanoodi
Volume 2, Issue 7 , July 2013, , Pages 17-41
Abstract
Thermal power plant emissions are considered as one of the most important environmental pollutions. In this study environmental efficiency of electricity industry for NOx emissions is calculated. Our data include 6 power plants of three Khorasan provinces for 1384-1387. We rely on hyperbolic translog ...
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Thermal power plant emissions are considered as one of the most important environmental pollutions. In this study environmental efficiency of electricity industry for NOx emissions is calculated. Our data include 6 power plants of three Khorasan provinces for 1384-1387. We rely on hyperbolic translog distance function specification that treats the outputs asymmetrically by allowing equiproportional desirable outputs expansion and undesirable outputs contraction. This function is implemented by using conventional econometric techniques based on panel data maximum likelihood estimation. The result shows that environmental efficiency for this sample of plants is 93.81 on average. In addition, our estimated shadow price for each kilogram of NOx is 1.12 Rials. Results of this kind of studies can be useful for decision makers to have a better environmental prospect for planning.
