If you are looking for another study this one is an even better study out of Alaska, but with varied authors from both Canada and US, who are both Academics and Government Employees.

Efficacy of Bear Deterrent Spray in Alaska

I like the use of Alaska for these studies, it is closes to Canada in Latitude, it has a frontier mentality which means a higher level of gun handling and individuals are more likely to have a fire arm handy than in the south and still people carry and use Bear Spray.

Bear Spray vs. Guns Arguments should not be about "Gun Control", it about saving lives. If you have a Shot Gun Loaded with Slugs, in your hand, you are an excellent shot, then no problem. {PS this would also break Canadian Gun Laws unless you were out hunting with the gun).

Bear Spray is Legal in Parks & Protected Areas, Readily Available, Easy to Learn to Use, Highly Deployable and fairly Safe to Use (on both the Bears & Yourself)

Bear Spray Work well for what it is designed to do, nothing more. It does not means we should stop hunting, target shooting or owning weapons. Just that Bear Spray can save both the Your Life and the Bears Life more often.