Some small evidence of the importance of keeping a separate international profile, from no less than the Voice of America, a great big booming voice from the Earth indeed:
VOA News - Numbers of Foreign Students Declining at US Universities: Andrew Flagel says, "The number of students who can actually get through the [immigration] visa process in a timely manner and into the United States has diminished dramatically and that has affected our numbers significantly, especially at the graduate level. We are also seeing a decrease in applications from overseas."
This perception that it is hard to study in the US is something that we should avoid transferring over to Canada. But adopting many of their requirements to placate border paranoia will have this effect. Other forms of integration will increase this perspective. But graduate students are extremely productive intellectual labour, and the number of students that come to study in Canada is an indication of how far Canada has shifted from being a resource-extracting economy. It's not healthy to be a perpetual hewer of wood and carrier of water.