Yes, Dave McLaughlin, with the International Institute for Sustainable Development, and I actually wrote an op-ed in The Globe and Mail on that.
We thought that ultimately—this is something that we're looking at post-2020—the federal backstop model would actually make sense as a national model for a couple of reasons. One is to achieve that consistency and harmonization across the board that the other panellists have talked about. The other is the output-based allocations or emissions performance standards that have been brought forward in different provinces to deal with competitiveness challenges. Another way of dealing with that is border carbon adjustment, but that's really something that could only be done at the national level. I think a national-level carbon price with a consumer rebate, and then moving output-based allocations to a border carbon adjustment, would be, in the long run, a policy worth looking at.