Investigation of Citizen's WTP for Mashhad Air Pollution Reduction (Applying two stage Heckman model)

In order to value Mashhad air quality improvement and determine its effective factors, current study has applied contingent valuation method and two stage Heckman model on gathered data of high-polluted and medium-polluted regions of Mashhad which are gathered through field survey method. Based on results of contingent valuation method it can be say that 30 percent improvement of air quality total value in high-polluted region equals 7134146560 Rials per month and in medium-polluted region equals 5242428950 Rials per month. Therefore according to citizens’ mentality, value of 30 percent improvement of Mashhad air pollution state equals 12376575510 Rials per month. Based on results of this study, in decision-making stage, education level, age, kind of settlement region, sex and having child are significant variables on citizen's WTP for air pollution reduction. In addition education level, sex, age, household income, having child and having car are effective factors on people willingness to pay in administrating stage.