پیوندهای مفید
اخبار و اعلانات
آمار
| تعداد نشریات | 49 |
| تعداد شمارهها | 1,276 |
| تعداد مقالات | 11,018 |
| تعداد مشاهده مقاله | 22,699,509 |
| تعداد دریافت فایل اصل مقاله | 15,331,783 |
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 | ||
|
Ajdari, A., & Fiyazi, M. T. (2023). Analysis of Scale-Based Growth Capacities in Iran's Manufacturing Sector. Quarterly Journal of Economic Research and Policies, 31(108), 133-163. (In Persian).doi: 10.61186/qjerp.31.108.133 Altuntas, M., Berry-Stölzle, T. R., & Cummins, J. D. (2021). Enterprise risk management and economies of scale and scope: evidence from the German insurance industry. Annals of Operations Research, 299(1), 811-845. Doi: 10.1007/s10479-019-03393-x Asongu, S. A.; & Odhiambo, N. (2019). Size, efficiency, market power, and economies of scale in the African banking sector. Financial Innovation, 1(5), 1-22 doi: 10.1186/s40854-019-0120-x Azami, S., Jalilian, S., & Ahmadi, M. (2016). Simultaneous Estimation of Mark-Up and Returns to Scale in Iran's Manufacturing Industries. Economic Modeling Research, 7(25), 183-215. (In Persian).doi:10.18869/acadpub.jemr.7.25.183 Bain, J. S. (1951). Relation of profit rate to industry concentration: American manufacturing, 1936–1940. The Quarterly Journal of Economics, 65(3), 293-324. Bashiri, S., & Heidari, H. (2023). Investigating the Status and Evolutions of Economies of Scale in Iran's Manufacturing Industries. Quarterly Journal of Industrial Economics Research, 7(24), 1-18. (In Persian).doi: 10.30473/JIER.2024.70152.1433 Bhuyan, S. N., & Lopez, R. (1997). Oligopoly Power in the Food and Tobacco Industries. American Journal of Agricultural Economics, 3(79), 1035-1043. Doi: 10.2307/1244442 Bhuyan, S., & Lopez, R. A. (1998). What determines welfare losses from oligopoly power in the food and tobacco industries? Agricultural and Resource Economics Review, 27, 258-265. doi: 10.22004/ag.econ.31519 Carlton, D. W., & Perloff, J. M. (2005). Modern Industrial Organization (4th Ed.). Evgeny V. Balatsky, Natalia A. Ekimova, 2024. "Identification of Economies of Scale in Regional-Industrial Production Complexes of Russia: Theoretical Foundations and Econometric Estimates," Journal of Applied Economic Research, Graduate School of Economics and Management, Ural Federal University, 23(2), 394-421. doi:doi.org/10.15826/vestnik.2024.23.2.016 Fuller, A., & Smith, S. M. (2025). Economies of Scope in the Water-Energy Nexus. Environmental and Resource Economics, 1-26. Doi: 10.1007/s10640-025-00989-9 Harri, H. R., Sadeghi, Z., & Rezaeinejad, S. (2018). Measuring Scale Economies in Iran's Power Industry: The Case of Thermal Power Plants. Quarterly Journal of Industrial Economics Research, 2(6), 13-24. (In Persian). Doi: 10.30473/INDECO.2020.49964.1117 Jalalabadi, A., & Mirjalili, F. (2007). Monopoly and concentration in the country's industries. Economic Essays with an Islamic Approach, 4(7), 197-232. (In Persian). Khalili Asl, M., & Khodadad Kashi, F. (2023). Measuring Economies of Scale in Iran's Automotive Industry and Evaluating the Welfare Effects of Import Diversity. Biannual Scientific Journal of Economic Studies and Policies, 10(2), 297-324. (In Persian).doi:10.22096/esp.2024.538085.1563 Khalili Asl, M., Khodadad Kashi, F., Shah Hosseini, S., & Rasekhi, S. (2020). The Impact of Economies of Scale and Product Diversity on Foreign Trade and Investigating the Causality Relationship Between Them: A Case Study of Iran's Manufacturing Industries. Quarterly Journal of Economic Research and Policies, 28(95), 381-411. (In Persian).doi: 10.52547/qjerp.28.95.381 Khodadad Kashi, F. (2001). Estimation of the Social Costs of Monopoly in Iran's Industrial Sector. Commercial Reviews Journal, 6(21), 83-116. (In Persian). Khodadad Kashi, F. (2007). Economies of Scale in the Iranian Economy: The Case of the Industrial Sector. Quarterly Journal of Economic Research, 42(3), 1-18. (In Persian). Khodadad Kashi, F., Mehraara, M., & Mikaeili, S. V. (2023). Evaluation of Market Structure and Measurement of Market Power in Iran's Industrial Sector. Commercial Reviews Journal, 27(106), 1-34. (In Persian). Lipczynski, J. H.; Wilson, O. S. & Goddard, J. (2017). Industrial Organization: Competition, Strategy and Policy (5th ed.). Pearson. Molinos-Senante, M., & Maziotis, A. (2018). Flexible versus common technology to estimate economies of scale and scope in the water and sewerage industry: an application to England and Wales. Environmental Science and Pollution Research, 25(14), 14158-14170. Norani Azad, S., & Khodadad Kashi, F. (2019). Efficiency and Productivity Growth Evaluation in the Passenger Air Transportation Industry: Application of the Decomposable Frontier Function. Quarterly Journal of Economic Research and Planning, 24(2), 31-58. (In Persian). doi:10.29252/jpbud.24.2.31 Norani Azad, S., Khodadad Kashi, F., & Rasekh Jahromi, E. (2020). Measuring the Impact of Learning Intensity and Economies of Scale on the Cost of the Health Sector in World Countries. Economics and Regional Development, 27(20), 1-27. (In Persian). doi.org/10.22067/erd.2021.18814.0 Nowrouzi, A., & Shahiki Tash, M. N. (2017). Parametric Assessment of Electricity Consumption Efficiency and Decomposition of Electricity Intensity in Iran's Industrial Sector. Quarterly Journal of Industrial Economics Research, 1(2), 65-85. (In Persian). Doi: 10.30473/INDECO.2017.7070 Pezouyan, J., Khodadadkashi, F., & Shahiki Tash, M. (2011). Nonparametric evaluation of the gap between price and marginal cost in Iranian industries within a Cournot model. Journal of Quantitative Economics, 8(2), 95-121. (In Persian). doi.org/10.22055/jqe.2011.10602 Pourpartovi, M., Danesh Jafari, D., & Jalalabadi, A. (2009). Comparative study of monopoly and concentration in some industries of Iran. Economic Research Journal, 9(35), 129-154. (In Persian). Salehi, H. (1998). Competition, monopoly, and concentration in Iranian industries: Analysis and suggestions. Quarterly Journal of Economic Research and Planning, 3(10–11), 191–229. (In Persian). Shahiki Tash, M. N., & Fiyouzi Ekhtiari, N. (2009). Estimation of welfare cost caused by effective monopoly in Iran's insurance industry. Iranian Economic Research, 13(38), 133-155. (In Persian). Stigler, G. J. (1956). The Statistics of Monopoly and Merger. Journal of Political Economy, 64(1), 33-40. Taherizadeh Anaripour, J., Mirzababazadeh, N. and Lotfi, A. (2025). Measuring barriers to entry, welfare costs of monopoly and parametric measurement of economies of scale: a case study of the food industry. Journal of Industrial Economics researches, 8(29), 1-19. Doi: 10.30473/jier.2025.72982.1480. (In Persian).doi:10.30473/JIER.2025.72982.1480 Waldman, D. N., & Jensen, E. A. (2013). Industrial Organization: Theory and Practice (4th Ed.). Routledge. Zellner, A. (1962). An efficient method of estimating seemingly unrelated regressions and tests for aggregation bias. Journal of the American statistical Association, 57(298), 348-368. doi.org/10.2307/2281644 | ||
|
آمار تعداد مشاهده مقاله: 48 تعداد دریافت فایل اصل مقاله: 30 |
||