I am not making claims or 'utilizing' anything to make a point. I was merely suggesting that Thomas Sowell has unique experience in this regard, not just in the USA but in many other nations. I don't know specifically whether his fifty years plus of his research includes Toronto but it's possible, you could always email him and ask.

It sounds to me like you are searching for an excuse to disregard any research that you may disagree with. I can understand that, I was like that too until I realized that the truth was more important than what I wanted to believe to be true.