Do economists consider CO2 to not be causing global warming?

There is a study that performed an econometric analysis of temperature data and CO2 levels, and found a dependence based on the increase of CO2 levels, not the CO2 level itself. That is, if you just stopped increasing emissions and kept CO2 at 400, then global warming would stop. Or it could rise to 500 and then... show more There is a study that performed an econometric analysis of temperature data and CO2 levels, and found a dependence based on the increase of CO2 levels, not the CO2 level itself. That is, if you just stopped increasing emissions and kept CO2 at 400, then global warming would stop.
Or it could rise to 500 and then stay level, and global warming would stop.

This was based on the idea that CO2 levels had 2 unit roots, while temperature had just one unit root.
Update: I appear to have misinterpreted the paper. They are saying doubling CO2 emissions will cause temporary warming, but no long term warming.
http://www.earth-syst-dynam.net/3/173/20...
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