تخمین همزمان مارک ـ آپ و بازدهی نسبت به مقیاس در صنایع کارخانه‌ای ایران

نویسندگان
دانشگاه رازی
چکیده
در این مقاله مارک آپ و بازدهی نسبت به مقیاس 19 صنعت کارخانه‌ای ایران در کد دو رقمی ISIC به طور همزمان در طی سال‌های 86-1374 مطابق با دو رهیافت پسماند سولو و ساختاری برآورد می‌شود. بر اساس رهیافت پسماند سولو فرض نئوکلاسیکی بازدهی ثابت نسبت به مقیاس در 95 درصد صنایع کارخانه‌ای تأیید می‌شود ضمن اینکه در 84 درصد صنایع کارخانه‌ای قیمت به طور معنی داری بیش از هزینه نهایی است. بر اساس رهیافت ساختاری 53 درصد صنایع کارخانه‌ای ایران به طور معنی داری بازدهی فزاینده نسبت به مقیاس را تجربه می‌کنند ضمن اینکه در 79 درصد صنایع قیمت بیش از هزینه نهایی است. مطابق با معیار سهم هزینه نهاده‌ها در درآمد به عنوان معیار تئوریکی نسبت بازدهی نسبت به مقیاس به مارک آپ، رهیافت ساختاری این نسبت را در 53 درصد موارد نزدیکتر به واقعیت برآورد می‌کند.
کلیدواژه‌ها

عنوان مقاله English

Simultaneous Estimation of Markup and Return to Scale in Manufacturing Industries of Iran

نویسندگان English

Somayeh Azami
Sajedeh Jalilian
Maryam Ahmadi
Razi University
چکیده English

The current study is an attempt to estimate markup and return to scale of 19 two-digit ISIC manufacturing industries of Iran, simultaneously, in accordance to Solow Residual and Structural approach, during the period 1995-2007. Based on Solow Residual approach, the neoclassical assumption of constant return to scale is approved within 95% of manufacturing industries; however in 84% of industries the price was higher than marginal cost significantly. Based on structural approach, 53% of manufacturing industries of Iran are experiencing increasing return to scale significantly; however, in 79% of industries, the price is higher than marginal cost. According to the criteria share of the cost of inputs in income as a theoretic criteria for return to scale-markup ratio, in 53% of cases, structural approach estimates this ratio closer to the reality.

کلیدواژه‌ها English

Solow Residual Approach
Structural Approach
Manufacturing Industries
Markup
Return to Scale
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