When we looked at carbon pricing, we looked at what is being proposed and implemented by the government, which is a carbon tax. As we all know, it's a pricing on pollution as well as an output-based pricing system, so that's what we consider.
My office does not have the mandate to self-initiate looking at alternative proposals that could be better or worse than what is being proposed, unless I'm requested to do so by a House or Senate committee, which has not been the case for this, so we have not looked at alternative ways of reducing Canada's greenhouse gas emissions.
However, there is a strong consensus among economists that a price on greenhouse gas emissions is a very efficient way—very often the most efficient way—of reducing greenhouse gas emissions. If we were to try to cost alternative ways of reducing greenhouse gas emissions, we would likely find that the cost is at least equivalent overall for the economy.