Design, Implementation, and Fiscal Impliions Prepared by David Coady, Javier Arze del Granado, luc eyraud, Hui Jin, Vimal Thakoor, Anita Tuladhar, and lilla Nemeth Authorized for distribution by Carlo Cottarelli December 2012 JEL Classifiion Numbers: D49, D61, H21 Keywords: Petroleum products, price smoothing, fuel taxes