Thank you very much.
Generally speaking, it's been very difficult to engage economists in the climate change debate. Some work has been done by several academics in Canada on the costs of reducing emissions and also of responding to the impacts.
The problem for both of them is the baseline. What would happen if you did nothing? That's the challenge that many of them face.
But at the moment, if this is the intent of your question, I'm not aware of any report of the magnitude and extent of the one produced recently by Nicholas Stern.