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سنجش تابع هزینه ترانسلوگ و اندازهگیری پارامتریک صرفههای مقیاس در صنایع منتخب | ||
| فصلنامه علمی پژوهش های اقتصاد صنعتی | ||
| دوره 9، شماره 33، پاییز و زمستان، مهر 1404، صفحه 34-56 اصل مقاله (1.21 M) | ||
| نوع مقاله: کاربردی | ||
| شناسه دیجیتال (DOI): 10.30473/jier.2026.76607.1526 | ||
| نویسندگان | ||
| عرفانه راسخ جهرمی1؛ مهرزاد ابراهیمی* 2؛ هاشم زارع1 | ||
| 1گروه اقتصاد، واحد شیراز، دانشگاه آزاد اسلامی، شیراز، ایران | ||
| 2گروه اقتصاد،دانشکده اقتصاد و مدیریت ، دانشگاه آزاد اسلامی، شیراز، ایران | ||
| چکیده | ||
| صرفههای مقیاس نقش مهمی در تبیین کارایی هزینهای بنگاهها و جهتگیری سیاست صنعتی ایفا میکند، با این حال شواهد تجربی منسجم درباره وضعیت و روند بلندمدت آن در صنایع ایران محدود است. این پژوهش با هدف سنجش صرفههای مقیاس در صنایع منتخب ایران با استفاده از تابع هزینه ترانسلوگ طی دوره 1401-1381 انجام شده است. روش تحقیق مبتنی بر رویکرد پارامتریک و با بهرهگیری از دادههای پانلی 38 صنعت با کد ISIC چهاررقمی از مرکز آمار ایران است. برای برآورد مدل از روش رگرسیون به ظاهر نامرتبط (SUR) و برای تحلیل پایایی دادهها از آزمونهای ریشه واحد و همانباشتگی استفاده شد. یافتههای تحقیق نشان میدهد متوسط صرفههای مقیاس در بخش صنعت روندی نزولی داشته است. این شاخص از 0083/0 در سال 1381 به اوج 029/0 در سال 1391 رسید، اما سپس کاهش یافته و در سال 1401 به 002/0 رسید. این کاهش بیانگر تضعیف تدریجی مزیت تولید در مقیاس بزرگ در صنایع کشور است. در بین صنایع مورد بررسی، ریختهگری فلزات غیرآهنی با 083/0 در سال 1391 بیشترین و صنایع غذایی کمترین میزان صرفههای مقیاس را دارا بودهاند. نتایج حاکی از آن است که کاهش صرفههای مقیاس میتواند پیامدهایی همچون افزایش هزینههای نهایی تولید و کاهش کارایی صنعتی داشته باشد و لزوم بازنگری در سیاستهای مرتبط با مقیاس بنگاه، بهرهبرداری از ظرفیت تولید و بهبود ساختار صنعتی را برجسته میسازد. | ||
| کلیدواژهها | ||
| انحصار"؛ تابع هزینه ترانسلوگ"؛ صرفههای مقیاس"؛ "؛ صنایع منتخب" | ||
| عنوان مقاله [English] | ||
| Estimation of the Translog Cost Function and Parametric Measurement of Economies of Scale in Selected Industries | ||
| نویسندگان [English] | ||
| erfaneh rasekhjahromi1؛ mehrzad ebrahimi2؛ hashem zare1 | ||
| 1Department of Economics, Shi.C., Islamic Azad University, Shiraz,. Iran. | ||
| 2Department of Economics, Shi.C., Islamic Azad University, Shiraz, | ||
| چکیده [English] | ||
| The industrial sector in Iran faces structural challenges, including high concentration and monopoly. This study aims to measure economies of scale in selected Iranian industries using a translog cost function over the period 2002–2022 (1381–1401 in the Iranian calendar). The research methodology is based on a parametric approach, employing panel data from 38 industries classified under four-digit ISIC codes provided by the Statistical Center of Iran. The model was estimated using the seemingly unrelated regression (SUR) method, while unit root and cointegration tests were applied to assess data stability. The findings indicate that the average economies of scale in the industrial sector have followed a declining trend. This index rose from 0.0083 in 2002 to a peak of 0.029 in 2012, but subsequently decreased to 0.002 in 2022. This reflects the gradual loss of advantages associated with large-scale production. Among industries, non-ferrous metal casting recorded the highest economies of scale at 0.083 in 2012, while the food industry exhibited the lowest. The downward trend in economies of scale may be attributed to factors such as inefficient capacity utilization, downsizing of factories, rising marginal costs, and intensifying external constraints. | ||
| کلیدواژهها [English] | ||
| Monopoly", Translog Cost Function", Economies of Scale, ", Preferred Industries" | ||
| مراجع | ||
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