@inproceedings{paperid:1022664,
author = {Firooz Zare, Ali and Ghorbani, Mohammad},
title = {Investigation of Citizens  WTP for Mashhad Air Pollution Reduction: Applying Heckit model},
booktitle = {5th symposium on advances in sciences and technology},
year = {2011},
location = {mashhad, IRAN},
keywords = {Air Pollution; Heckit Model; Mashhad; Contingent Valuation},
}