ln the 1990s,a set of phenomena marked a substantial change in the history of decentralization (krueathep,2004;Nagai,Mektrairat,& Funatsu,2008).After the Black May incident in 1992,in which popular protest against the junta and bliidy militaty crackdown took place in Bangkok,decentralization was cinsidered as one of the most significant measures in consolidating Thaidemocracy (Chardchawarn,2010).