dx.doi.org/10.22093/wwj.2018.108776.2556  ﻣﺠﻠﻪ ﺁﺏ ﻭ ﻓﺎﺿﻼﺏJournal of Water and Wastewater ﺩﻭﺭﻩ٣٠ ، ﺷﻤﺎﺭﻩ٥ ، ﺳﺎﻝ١٣٩٨ Vol. 30, No. 5, 2019 Case Study Jouranl of Water and Wastewater, Vol. 30, No.5, pp: 75-85 The Effective Factors on Willingness to Pay in the Project of Caspian Sea Water Transfer Using Contingent Valuation Method (Case Study: Semnan City) M. Maddah 1 , S. Seifalian 2 1. Assoc. Prof., Dept. of Economics, Faculty of Economics, Management and Administrative Sciences, Semnan University, Semnan, Iran (Corresponding Author) majid.maddah@semnan.ac.ir 2. Former Graduate Student of Economics, Faculty of Economics, Management and Administrative Sciences, Semnan University, Semnan, Iran (Received Nov. 28, 2017 Accepted June 30, 2018) To cite this article: Maddah, M., Seifalian, S., 2019, “The effective factors on willing to pay in the project of Caspian Sea water transfer using contingent valuation method (case study: Semnan city).” Journal of Water and Wastewater, 30(5), 75-85. Doi: 10.22093/wwj.2018.108776.2556. (In Persian) Abstract People’s participation is one of the means of financing investment through which will develop investment in different sectors such as the supply of public goods and services. In this research, how to encourage people to participate in the proposed project of water transfer from Caspian Sea to Iran’s central plateau has been studied. The paper evaluates the value of the citizens of Semnan’s participation in the implementation of water transfer project from the Caspian Sea to the Central Plateau using the Contingent Valuation Method (CVM) and identifies effective factors on willingness to the pay by applying Logit model in the framework of Maximum Likelihood Method. Data through two-dimensional dual questionnaire that includes 384 members have been collected. The results from model estimation show that firstly, the variables of income, educational level have a positive and significant effect and the number of household members and the proposed price have a negative and significant effect on the willingness to pay of Semnan’s citizens. Secondly, the average of per household willingness to pay, 433,077,096 Rials annually and the people’s annual participation value, 30.1 milliard Rials is estimated. Citizen’s willingness to finance the costs of project implementation indicates citizens' responsibility in resolving the regional problems that can be presented as a good model in the performance of national plans and solving of regional problems. Keywords: Caspian Sea, Contingent Valuation Method, Willingness to Pay, Logit Model, Semnan.