Asian Development Bank (2022). “Integration Indicators technical notes”.
https://aric.adb.org. (Accessed on: 20/08/2023)
Helpman E. (1987). Imperfect competition and international trade: Evidence from fourteen industrial countries. Journal of the Japanese and International Economies. 1: 62-81.
Hoekman B, Schiff M. (2002). “Benefiting from regional integration”. Development, Trade and the WTO. Washington, D.C: The World Bank.
Hosseini M. A. (2007). “The Effects of Preferential Trade Arrangements Among ECO Member Countries on Iran’s Foreign Trade Promotion”. Institute for Trade Studies and Research, 431 Pages. [in Persian]
Hosseini MA, Bozorgi V. (2002). “Regional partners of Iran and the possibility of forming the central core of a regional partnership”. Journal of Commerce. 23(6): 1-36. [in Persian]
Hosseini MA, Hooman T. (2007). “Comparative study of international macroeconomic indicators of ECO countries in the process of regionalism”. Knowledge and Development. 23(6): 1-36. [in Persian]
Johnson HG. (1965). “An economic theory of protectionism, tariff bargaining, and the formation of customs unions”. Journal of Political Economy. 256-283.
Krugman P. (1996). Development, Geography and Economic Theory, Cambridge, MA: The MIT Press.
Lipsey RG, Lancaster K. (1956). “The General Theory of The Second Best”. Review of Economic Studies. October: 33-49.
Jagdish B. (1996). “The theory of preferential trade agreement: Historical evolution and current trends”. The American Economic Review. 86(2): 82-87.
Meade J. (1955). The Theory of Customs Unions. Amsterdam: North-Holland.
Salvatore D. (2007). International Trade. 9th ed., New York McGraw-Hill.
Sheila P. (2000). Regionalism among Developing Countries. Macmillan Press LTD. Overseas Development Institute. London.
UNCTAD (1995-2022).
Handbook of International Trade and Development Statiscs 1994-2022. New York: UN Publications.
www.UNCTAD.Org.
Viner J. (1953). The customs union issue. New York: The Carnegie Endowment for International Peace.
World Bank (2023). https://databank.worldbank.org/indicator/NY.GDP.PCAP.CD/Popular-Indicators#World Development Indicators.
---------------- (2001). Trade Blocs: A World Bank Policy Research Report. New York: Oxford University Press.
------------ (2000). Trade Blocs: A World Bank Policy Research Report, New York: Oxford University Press.
World Trade Organization (WTO) (2022). “World Trade Report 2022”. http://www. wto. Org.