未来能源研究所：范围越广就越好吗？既有扭曲、排放弹性和排放定价范（英文版）

Economists often regard a broad-based price on carbon (whether in the form of a carbon tax or cap and trade) as the most efficient policy to reduce carbon dioxide emissions. Relative to a narrower policy that omits some emissions sources, a broader policy is often favored because it can exploit more low-cost emissions reduction opportunities and cause less emissions leakage to uncovered sources. Yet narrower approaches have gained considerable political support, in part because they avoid pri