“…Fifth, in response to concerns about the costs of complying with emissions commitments, many proposals recommend a hybrid tax-quota or pure price regimes to set a cap on marginal costs (Aldy et al, 2001;Cooper, 1998Cooper, , 2001McKibbin and Wilcoxen, 1997, 2000Stavins, 2001b;Victor, 2001). Other proposals take different approaches to limiting the costs of climate policy (Barrett, 2001(Barrett, , 2003Bradford, 2002;Hahn, 1998).…”