First, as I already said, this agreement will certainly not benefit Canadians owing to tax evasion and avoidance. It will not benefit Panamanians either. As far as tariffs go, here are some statistics from African countries:
[Translation] [...] the 40% tariff reduction in Ivory Coast resulted in massive layoffs in the chemistry, textile, footwear and automobile assembly industries. In Senegal, a reduction of tariffs from 165% to 90% lead to the disappearance of one third of all jobs in the manufacturing sector between 1985 and 1990.
Therefore, reducing tariffs makes local companies a lot less competitive. That could have negative consequences. It's important to point this out.
Regarding your question about whether we have data, the problem with tax havens is that the money disappears into big black holes. We have looked into this, and it's extremely difficult to get exact data. This is a constant challenge because bank secrecy stands in our way. This secrecy makes it impossible for us to know how much money is tucked away in tax havens. If only for this reason, that is, the cloak of secrecy under which transactions take place, we should withdraw from these kinds of agreements.