Oubliette: I don't know much about Bergman. A few other posters here have mentioned he has credibility problems.
Now that I have read a couple of his other papers, I agree with those other posters.
I didn't know much about him until you posted those links. I had read his material that related to the JWs but knew nothing else about him.
His educational list looks impressive, but I have a bit of difficulty evaluating his education because of the differences between Canadian and US degree requirements. For example, a Phd in the US is sometimes less than, or equal to a Masters degree in Canada.
As to the question you asked earlier about why the WTS would use Bergman in their Awake! article, I think that you have revealed another one of those 'cracks' that show there is more behind the WTS than we are aware of.