Figure 11.9: Averaged effects of including ETC on carbon tax rates, CO₂ emissions and GDP: 9 global models 2000–2100 for the 450 ppm and 550 ppm CO₂-only stabilization scenarios

Notes: The figures show the simple averages of results from 9 global models 2000–2100 for (a) carbon tax rates and emission permit prices in US$(2000)/tCO₂, (b) changes in CO₂ (% difference from base) and (c) changes in global GDP (% difference from base). The results are shown with and without endogenous technological change. The grey background lines show the range from the individual models for 450 ppm with ETC. See source for details of models.

Source: adapted from Edenhofer et al. (2006b).