I can’t cite a study, but most of the people I hike with bring dogs, every time. I don’t think I’ve done a backpacking trip or cabin trip in Alaska, or even a day hike, without a dog in the group, or multiple dogs. The only place I haven’t brought dogs is Denali National Park, since they’re not allowed off the main roads, and not allowed on trails or off trail.
I don’t know anyone who has been attacked by a bear because of their dog. I know someone who had to shoot a bear to protect their hunting camp. I know someone who was mauled because she was in thick brush doing a bird survey (she’s ok). I know folks who have been bluff charged by bears.
There are lots and lots of dogs in Alaska with their hiker/backpacker buddies. I do think people should train their dogs not to chase wildlife and to come to a voice command. That’s both for their own safety so that the dog doesn’t harass a moose or bear, which can end badly, and also to protect wildlife from harassment and attack or kill by the dog. I have witnessed bad dog owners whose dogs killed birds and marmots. Pisses me right off, tbh.
Not a study, but I wouldn’t say no to dogs in my company as a hiker or backpacker, but maybe I’d change my mind if I saw more studies/evidence.

