I would say the reasons are many and vary from person to person. But, clearly, a young person who has always lived and gone to school in Yukon and then leaves to attend the University of Ottawa, for instance, experiences quite a shock. There are more students on the University of Ottawa campus than in all of Yukon. It's a difficult adjustment for most of them. Their roots are in Yukon.
Why do people go back? There are always those who, at some point in their lives, choose to go back to where they are from to live, simply because it is home, whether you are talking about Yukon or somewhere else. I think young people go back because Yukon is home to them. The quality of life is pretty good. It's a nice place. If they decide to raise a family there, the living is easy; they don't have to spend an hour in the car just to take the kids to soccer. Skiing doesn't cost a fortune. There are many benefits to living in Yukon that would make someone want to start their family there.