با همکاری مشترک دانشگاه پیام نور و انجمن اقتصاد دفاع ایران و انجمن اقتصاد انرژی ایران

Document Type : applicative

Authors

1 Professor of Economics, Mazandaran University, Mazandaran, Babolsar

2 Assistant Professore of Economics, Allameh Tabataba'i University, Tehran, Iran

Abstract

According to Krugman, product variety has played a central role in models of trade and growth. This study investigates the welfare gains due to Iran import of new varieties from 2014 to 2018 with the use of Feenstra (1994) and Broda & Weinstein (2006) methods. The amount of product variety is measured by product-level import data according to 2-digit code Harmonized System classification. Empirical results show that increase (decrease) in imported varieties would lead to increase (decrease) in consumers welfare. With the implementation of extensive sanctions and reducing the variety of Iran's imports in 2014 and 2015, the gains of variety of imports will decrease. In 2016 and 2017, with the implementation of Barjam and the elimination of effective sanctions, the Variety of imported goods to Iran and as a result the gains of this variety will increase. In 2018, with the unilateral withdrawal of the United States from Barjam and the beginning of a new round of sanctions against Iran, the gains of the variety of imported goods are reduced and as a result, the welfare of consumers is reduced. Positive gains in 2017 confirm that between 2016 to 2017 due to the variety of imported products, the welfare of consumers increased by 0.1 percent of GDP.

Keywords

بخشوده، محمد و رهام رحمانی (1388). "بررسی میزان پایداری هزینه واردات و تنوع و تخصص در تولید، صادرات و واردات انواع گوشت در ایران". مجله پژوهش های صنایع غذایی، دوره نوزدهم، شماره 2، صص 68-58.
بخشوده، محمد و زکریا فرج‌زاده (1391). "اثر کاهش تعرفه‌های واردات بر متغیرهای کلان بخش کشاورزی و رفاه روستایی ایران". مجله اقتصاد کشاورزی و توسعه، سال بیستم، شماره 77، صص 254-217.
سالواتوره، دومینیک (2007). اقتصاد بین­الملل (تجارت بین­الملل). ترجمه: حمیدرضا ارباب (1388). تهران: نشر نی.
کروگمن، پل و اوبیسفیلد، موریس (2000). اقتصاد بین­الملل (تئوری و سیاست). ترجمه: حسین صمصامی (1384). تهران: دانشگاه شهید بهشتی، مرکز چاپ و انتشارات.
گاندولفو، ژیان کارلو (1937). تجارت بین­الملل. ترجمه: مهدی تقوی و تیمور محمدی (1380). تهران: پژوهشکده امور اقتصادی.
طیبی، کمیل و مصری نژاد، شیرین (1385). "آزادسازی تجاری بخش کشاورزی و کاربرد مدل­های تعادل عمومی قابل محاسبه (CGE): مطالعه­ موردی خانوارهای ایرانی". فصلنامه بررسی‌های اقتصادی، دوره چهارم، شماره 1، بهار 86، صص 24-5.
 
 
 
Broda C. and D. Weinstein (2006). “Globalization and the Gains from Variety”. Quarterly Journal of Economics, No. 121, pp. 541-583.
Chen B. and M. Hong (2012). “Import Variety and Welfare Gain in China”. Review of International Economics, 20(4), pp. 807-820.
Cabral S. and C. Manteu (2010). “Gaiks from Import Variety: The Case of Portugal”. Economic Bulletin, pp. 85-102.
Dixit A.K. and J.E. Stiglitz (1977). “Monopolistic Competition and Optimum Product Diversity”. American Economic Review, No. 67, pp.308-297.
Demidova S., Arkolakis C. and P. Klenow (2008). “Firm Heterogeneity and International Trade, Endogenous Variety and the Gains from Trade”. American Economic Review: Paper & Proceedings, 98(2), pp. 450-444.
Funke M. and R. Ruhwedel (2008). “Trade, Product Variety and Welfare: A Quantitative Assessment for Mainland China”. China Economic Journal, 1(2), pp. 203-212.
Funke M. and R. Ruhwedel (2003). “Trade, Product Variety and Welfare: A Quantitative Assessment for Transition Economies in Central and Eastern Europe”. BOFIT Discussion Papers, No. 17.
Feenstra R. (2006). “New Evidence on the Gains from Trade”. Review of World Economics, 142(4), pp. 617-641.
Helpman E. and P.R. Krugman (1999). Market Structure and Foreign Trade: Increasing Returns, Imperfect Competition and the International Economy. Cambridge: The MIT Press.
Helpman E. and P.R. Krugman (1985). Market structure and foreign trade. Cambridge: The
MIT Press.
Krugman P. (1979). “Increasing Returns, Monopolistic Competition and International Trade”. Journal of International Economics, No.9, pp. 479-469.
Krugman P. (1980). “Scale Economies, Product Differentiation, and the Pattern of Trade”. The American Economic Review,70(5), pp.950-959.
Krugman P. (1981). “Intraindustry Specialization and the gains from Trade”. Journal of Political Economy, No. 89, pp. 973-959.
Kancs D. (2010). “Structural Estimation of Variety Gains from Trade Integration in Asia”. The Australian Economic Review, 43(3), pp.270-88.
Klenow P., Arkolakis C., Demidova S. and A. Rodriguez-Clare (2008). “Firm Heterogeneity and International Trade, Endogenous Variety and the Gains from Trade”. American Economic Review: Paper & Proceedings, 98(2), pp.444-450.
Lorz O. and M. Wrede (2009). “Trade and Variety in a Model of Endogenous Product Differentiation”. The B.E. Journal of Economic Analysis & Policy, 9(1), pp. 1-12.
Mohler L. (2011). “Variety Gains from Trade in Switzerland”. Swiss Journal of Economics and Statistics, 147(1), pp. 45-70.
Minondo A. and F. Requena (2010). “Welfare Gains from Imported Varieties in Spain, 1988-2006”. WP-EC, 12.
Mohler L. and M. Seitz (2012). “The Gains from Variety in the European Union”. Review of World Economics, No. 148, pp. 475-500.
Saure P. (2012). “Bounded Love of Variety and Patterns of Trade”. Open Econ Rev, 23, pp.645-674.
Spence M. (1976). “Product Differentiation and Welfare”. American Economic Review, LXVI, pp.407-414.
Sato K. (1976). “The Ideal Log-Change Index Number”. Review of Economics and Statistics, 58(2), pp.223-228.
Suranovic S. (2012). Policy and Theory of International Trade. Washington: Saylor Foundation.
Vartia Y. (1976). “Ideal Log-Change Index Numbers”. Scandinavian Journal of Statistics. 3(3), pp.121-126.