Estimation the Marginal Cost of Production of Drinking Water in Tehran

Document Type : Original Article

Authors

1 M.A. Economic Systems Planning, Shahid Beheshti University, Tehran, Iran.

2 Assistant professor, faculty of economics and political science, Shahid Beheshti University, Tehran, Iran.

Abstract

The main objective of this paper is to determine the cost structure of the companies in charge of water production and distribution and to estimate the marginal cost of production of drinking water in Tehran. For this purpose, the Translog cost function is used to estimate the cost of production, transmission and distribution of water in Tehran Water and Wastewater Company. Analysis framework is based on a seemingly unrelated regression system. Time series data for the period of 1997-2012 has been used in this study. The results indicated that the labor, raw materials and other services inputs are substitute sand labor and capital inputs are complements. Results also showed that product cost elasticity is greater than unit and a diminishing returns to scale exists in Tehran Water and Wastewater Company. Finally, by using the calculated parameters and objective of minimizing the total cost of production, transmission and distribution of drinking water, the optimal production capacity in drinking water is calculated for Tehran. The results showed that, the optimal production capacity in Tehran drinking water is 376.15 MCM per year.

Keywords

References

 
خداپرست مشهدی، م.، فطرس، م.ح.، و فتحی، ب.، (1394)، "بررسی ساختار تابع هزینه بنگاه دو محصولی (مطالعه موردی شرکت آب و فاضلاب استان مرکزی)"، فصلنامه علمی-پژوهشی مطالعات اقتصادی کاربردی ایران، 4(14)، 193-217.
شرکت آب منطقه‌ای تهران، (1393)، ماهنامه داخلی پیام آب.
فلاحتی، ع.، سهیلی، ک.، و واحدی، م.، (1391)، "قیمت‌گذاری اقتصادی آب در بخش کشاورزی به‏روش رمزی"، فصلنامه پژوهش‌های اقتصاد و توسعه کشاورزی، (26)2، 134-140.
فلاحی، م.ع.، انصاری، ح.، داوری، ک.، و صالح‌نیا، ن.، (1388)، "قیمت‌گذاری آب شرب شهری براساس الگوی رمزی (مطالعه موردی شهر نیشابور)"،  فصلنامه پژوهش‌های اقتصادی ایران، (38)13، 217-242.
لطفعلی‌پور، م.ر.، و غمخوار، ق.، ( 1388)، "قیمت‌گذاری بهینه گاز طبیعی در شرکت خراسان بزرگ با استفاده از روش رمزی"، مجله دانش و توسعه، (27)16، 23-49.
مرزبان، ح.، و کریمی، ل.، (1391)، "بررسی ساختار هزینه فرآیند عرضه آب (مطالعه موردی شرکت آب و فاضلاب شیراز)"، مجله آب و فاضلاب، 23(3)، 68-77.
مهرگان، ن.، و امینی‌راد، م.، (1394)، کاربرد نرم‌افزار شازم در اقتصادسنجی و اقتصاد مالی، انتشارات نور علم.
Awad, I., (2012), “Using econometric analysis of willingness-to-pay to investigate economic efficiency and equity of domestic water services in the West Bank”,Journal of Socio-Economics, 41(5), 485-494.
Blackorby, C., Primont, D., and Russel, R.R., (1977), “On testing separatability restrictions with flexible functional forms”, Journal of Econometrics, 5(2), 195-209.
Coelho Faria, R., Da Silva Souza, G., and Belchior Moreira, T., (2005), “Public versus private water utilities: Empirical evidence for Brazilian companies”, Journal of Economics Bulletin, 8, 1-7.
http://eghtesadilam.blogfa.com
https://fa.wikipedia.org
Kim, H.Y. (1987), “Economies of scale in multi-product firms: An empirical analysis, Economica”, New Series, 54(214), 185-206.
Martins, R., Fortunato, A., and Coelho, F., (2006), “Cost structure of the Portuguese water industry: A cubic cost function application”, < http:// gemf. Fe. Uc. Pt> (July 8, 2008).
Nauges, C., and Van den Berg, C., (2007), “How natural are natural monopolies in the water supply and sewerage sector? Case studies from development and transition economics”, <http:// econ.worldbank.org> (Dec. 18, 2007).
Nnaji, C.C., Eluwa, C., and Nwoji, C., (2013), “Dynamics of domestic water supply and consumption in a semi-urban Nigerian city”, Habitat International, 40, 127-135.
Shephard, R. (1953), Theory of cost and production functions, Princeton University Press, Princeton, N.J.
Wang, H., Wu, W., and Zheng, S., (2011), “An econometric analysis of private sector participation in China’s urban water supply”, Utilities Policy, 19(3), 134-141.
 
Journal of Water and Wastewater Science and Engineering
Volume 3, Issue 2
July 2018
Pages 14-22

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History

  • Receive Date: 16 April 2018
  • Accept Date: 18 August 2018

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