My last question I'm going to open up to all three groups. I struggle to try to figure out from a policy perspective whether we should have a system that incents good behaviour in home analysis or built infrastructure analysis and energy efficiency audits through tax incentives, and then also energy retrofits in homes and the built infrastructure through some types of tax rebate associated with that capital investment, or whether we should just have these regulatory constraints that require people to do these things with new activity.
I'm wondering if any of you has information on the net effect, on which system is better or worse than the other, and on whether or not we have some statistical information that might allow us to make an evidence-based decision regarding how much each of these measures would contribute. There might be a bit of a Venn diagram there, an overlapping of the benefits. What's your general sense on the best way to go: voluntary, mandatory, regulation, or tax-based incentives to encourage the good behaviour?
I'll start with you, Mr. Mueller.