Well, the story you tell is exactly right. In fact, there are really strong cross-sectoral and cross-country linkages of the sort you describe. Spending in one province immediately affects many others. We'll see the aggregate numbers and say it must be because of that. It's not something you can actually trace at that level of detail.
The bigger picture here is that we've gone through a period where we had a down cycle in the global economy but strong commodity prices, especially energy, which meant that Canada had this extra income coming in. This drove additional investment and employment gains in that sector. Exports, investment and employment gains, and incomes—that's what we want for the whole picture. But this has been the leading part.
The spillover effects go across the country, but you can see that it's still concentrated. What we're expecting to see is a rebalancing as we go forward where everything begins to catch up to that kind of speed. There's a certain amount of regional difference. It stresses the adjustment process—people move etc. and it's unavoidable. Economists call that a terms-of-trade shock. In this case, it's a positive one, which is good for Canada because of the extra money coming in.