valuation of mashhad air pollution (contingent valuation approach)

abstract by using cross-section data which gathered through a survey research in mashhad ,contingent valuation approach and tobit model this study tries to determine economical value of air pollution and effective factors on wtp. based on contingent valuation approach, air pollution total value of airpollution in high-polluted region equals 7134146560 rials per month and in middle-polluted region equals 5242428950 rials per month. therefore according to citizens’ opinion percent improving mashhad air pollution state equals 12376575510 rials per month. also results of investigating effective factors on willingness to pay (wtp) by estimating one-stage tobit model showed that education level, household income, having car, age, kind of settlement region and having children are effective factors on willingness to pay. jel classification: q53,q52,q58.c42