mousavi,N , and Rajabi,M . "The Estimation of Willingness to Pay of Tourists for Conservation of Naghsh-e-Jahan Square in Esfahan and Analysis of Effective Socio-Economic Factors on Willingness to Pay (Application of Ordered Probit and Tobit models)" .e25076 , Journal of economics and regional development, 20, 6, 2013, e25076. doi: 10.22067/erd.v20i6.43090