The point I would like to make is the one you made just previously.
I think it's just so simplistic to talk about a carbon price versus regulations. It's the entire menu. There is not one country out there that has simply put in a pure carbon price without other measures. Every measure carries its own carbon cost and carbon price. The entire panoply needs to be understood in that context. It's not saying this one instrument is better than that one instrument. It's the context of the countries. It's the political conditions. It's the social conditions. It's all kinds of different factors. It's not simply an issue of price versus regs, or tax versus price, or what have you.