“…Most research on PCT focuses on equity, effectiveness, public acceptability, barriers to implementation and its potential advantages over the existing climate policy instruments, such as upstream "cap and trade" systems and carbon taxes (Harwatt, 2008;Jagers, 2010;Eyre, 2010;Bristow et al, 2010;Parag and Eyre, 2010;Fawcett et al, 2007;Wallace et al, 2010;Sorrell, 2010;Parag et al, 2011;Wadud, 2011;Starkey, 2012). Compared with a simple tax system the costs of PCT, which include implementation cost, participation cost and transaction cost, may be higher (Fawcett, 2010).…”