The Economics of Watershed Management: A Case Study of Mae Taeng 4 May 20134 May 2013tdriUncategorizedArnel B. Rala, Nipon Tangtham, Jeffrey R. Vincent @en, Eric Y. Azumi @en, Laxmi Worachai @en, Watershed Management @en, Mae Taeng @en, Mingsarn Kaosa-ard