Ron Bailey. “Carbon Taxes Versus Carbon Markets”. 25 May 2007: “taxes can be adjusted over time to achieve whatever limits policymakers decide best balance the costs of climate change with the benefits of economic progress.”
William Nordhaus has suggested that a good carbon tax trajectory, which balanced costs and benefits, would start with a tax of about $17 per ton, rising to $84 in 2050 and $270 in 2100.