دوره 7، شماره 27 - ( 2-1396 )                   سال7 شماره 27 صفحات 41-83 | برگشت به فهرست نسخه ها

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Najafzadeh B, Mamipour S. The Analysis of Factors That Influence the Environmental Efficiency in Iranian Electric Industry: DEA Approach and Panel Data. jemr. 2017; 7 (27) :41-83
URL: http://jemr.khu.ac.ir/article-1-1404-fa.html
نجف زاده بهنام، ممی پور سیاب. بررسی عوامل موثر بر کارایی زیست محیطی صنعت برق ایران: رهیافت تحلیل پوششی داده ها و داده های ترکیبی. فصلنامه تحقیقات مدل سازی اقتصادی. 1396; 7 (27) :41-83

URL: http://jemr.khu.ac.ir/article-1-1404-fa.html


چکیده:   (1434 مشاهده)

در این مطالعه برای ارزیابی کارایی زیست محیطی شرکت¬های برق منطقه¬ای کشور از رویکرد دو مرحله¬ای استفاده شده است به این نحو که در گام اول، کارایی زیست محیطی شرکت¬های برق منطقه¬ای در بازه زمانی 1383-1393 با استفاده از مدل مازاد مبنا مورد سنجش قرار گرفته ودر گام دوم عوامل موثر بر کارایی زیست محیطی با استفاده از مدل¬های توبیت و حداقل مربعات معمولی، مورد ارزیابی قرار گرفته است. نتایج حاصل از گام اول نشان می¬دهد کارایی زیست¬محیطی صنعت برق کشور در طی سال¬های 1383 تا 1385 با افت کارایی مواجه بوده است در حالیکه بین سال‌های  1386 تا 1388 کارایی زیست¬محیطی روند صعودی داشته و در بازه زمانی 1389-1393 (بعد از آزادسازی قیمت حامل¬های انرژی) افت محسوسی داشته است و در سال 1393 با توجه به کاهش کارایی بیشتر شرکت¬ها، میانگین کارایی به کمترین مقدار (65/0) رسیده است. نتایج حاصل از گام دوم نشان می¬دهد که اندازه شرکت برق منطقه¬ای و متغیر مجازی آزادسازی قیمت حامل‌های انرژی اثر منفی و متغیرهای نسبت برق تولید شده از نیروگاه های حرارتی، نسبت گاز به کار رفته در سوخت مصرفی، میزان بهره برداری از ظرفیت نیروگاه¬ها و ارسال برق به شرکتهای دیگر اثر مثبت بر کارایی شرکت¬های برق منطقه¬ای دارد. همچنین نتایج نشان می¬دهد که دریافت انرژی از شرکتهای دیگر در دوره زمانی مورد بررسی اثر معناداری بر بهبود کارایی نداشته است. در پایان، نتایج حاصل از افزودن یک متغیر جدید (متغیر لگاریتم سرانه تولید ناخالص داخلی) نشان داد که بجز متغیر نسبت گاز به کار رفته در سوخت مصرفی، اثرگذاری همه متغیرها از استحکام بالایی برخوردار است.

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نوع مطالعه: كاربردي | موضوع مقاله: انرژی، منابع و محیط زیست
دریافت: ۱۳۹۴/۱۱/۱ | پذیرش: ۱۳۹۵/۱۰/۱۱ | انتشار: ۱۳۹۶/۲/۲۷

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