The Effects of the Structural Variables of the Iranian Industries on the Social Cost: The SCP Approach

Document Type: Research Paper

Authors

Abstract

This paper studies the effects of the structural variables of the Iranian industries sector on the welfare cost using to the Structure-Conduct-Performance (SCP) theory. In other words, we investigate the role of structural components and their effects on the size of the welfare cost in Iran's industry sector. We have used the Leibenstein's model to calculate the deadweight loss and then the panel data model has been used to quantify the model. Leibenstein believed that in many cases the monopolistic industries operate inefficiently due to being on the margin of safety. So in addition to the welfare triangle, the costs of the inefficiency of monopolistic industries should be also considered as the welfare cost. Our results demonstrate that there is a direct relationship between the welfare cost and all of the parameters of the model (barriers to entry, market concentration, economies of scale, state ownership share and firm size).

Keywords

Article Title [Persian]

اثر متغیرهای ساختاری در صنایع ایران بر روی هزینه رفاهی طبق روش SCP

Authors [Persian]

  • محمد نبی شهیکی تاش
  • فروغ جهان تیغ
Abstract [Persian]

در این تحقیق بر مبنای نگرش ساختار، رفتار و عملکرد (SCP) به بررسی نقش مولفه‌های ساختاری و تأثیر آنها بر روی بخش صنعت ایران می‌پردازیم. با استفاده از این روش می‌توان مولفه‌های ساختاری و تأثیر آن بر حجم هزینه رفاهی در بخش صنعت ایران را مورد بررسی قرار داد. در این تحقیق در راستای سنجش هزینه رفاهی از رویکرد لیبن اشتاین استفاده شده است و برای برآورد مدل (SCP) از روش پانل دیتا استفاده می‌شود. لیبن‌اشتاین معتقد بود که صنایع انحصاری بدلیل قرار گرفتن در حاشیه امن، در بسیاری موارد با عدم کارایی فعالیت می­کنند. از اینرو وی معتقد بود که علاوه بر مثلث رفاه، می­باید هزینه‌های ناشی از عدم کارایی صنایع انحصاری را به‌عنوان هزینه رفاهی قلمداد کرد. یافته‌های تحقیق بیانگر این موضوع است که همه پارامترهای مدل (موانع ورود، تمرکز بازار، صرفه‌های ناشی از مقیاس، سهم مالکیت دولتی و اندازه صنعت) ارتباط مستقیمی با هزینه رفاهی دارند.

Keywords [Persian]

  • مدل لیبن اشتاین
  • ناکارایی
  • هزینه رفاهی
  • روش SCP

References

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Iranian Journal of Economic Studies

Volume 3, Issue 1
Winter and Spring 2014
Pages 21-42

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History

  • Receive Date: 15 February 2013
  • Revise Date: 12 April 2014
  • Accept Date: 30 April 2014

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