"Seminal work by Weitzman (1974) revealed prices are preferred to quantities when marginal benefits are relatively flat compared to marginal costs. We extend this comparison to indexed policies, where quantities are proportional to an index, such as output. We find that policy preferences hinge...

Tradable performance standards are widely used sectoral regulatory policies. Examples include the US lead phasedown, fuel economy standards for automobiles, renewable portfolio standards, low carbon fuel standards, and--most recently--China's new national carbon market. At the same time, theory...