“…A common assumption in most macroeconomic applications of dynamic optimal taxation is that a single representative good is consumed at each date. This is the case in Lucas and Stokey (1983), Judd (1985Judd ( , 1999, Chamley (1986), Zhu (1992), Jones et al (1993Jones et al ( , 1997, Chari et al (1994), Lansing (1998, 2006), Aiyagari et al (2002), and Gorostiaga (2003Gorostiaga ( , 2005. In this case, the tax rate on all consumption goods available at a particular date are implicitly equal.…”