I work at as full time faculty at AACSB accredited school. Most well known business schools in Canada are AACSB accredited. Hiring is very competitive, although AACSB accreditation is not spell out in the ads, most would expect you to have a degree from a top school that normally means AACSB accredited. Mcgill is not AACSB accredited and yet a PhD degree from this school would get you a position at any Canadian school but this seems to be more the exception than the rule. Again, accreditation is just a benchmark, if the school is not AACSB accredited then the school should be at least ranked in well known ranks such as the FT. By the way, I have a Doctorate from a non AACSB accredited school but my position is non tenure and only requires a Masters. My doctorate was just for personal improvement and is not giving me any extra pay raise. Again, if you want a doctorate just for self improvement and something you can put in your resume, then the 2 year doctorate will do. However, don't expect to compete with people that spent 5 years full time at accredited PhD programs at Canadian schools for tenure track positions.