Supplementary information
Here we describe the changes we made to the carbon cycle, the energy balance model and the radiative forcing scenario from non-CO2 forcers in DICE 2016R2. For all model runs the DICE 2016R2 model implemented in GAMS dated August 2017 was used (file name DICE-2016R2-083017.gms downloaded at https://sites.google.com/site/williamdnordhaus/dice-rice 2019-02-07).