Thanks for the link David.
After my last post I did a quick search but didn't find anything specific. I did find this pdf
http://www.aphis.usda.gov/wildlife_damage/nwrc/publications/01pubs/01-89.pdf that mentions a decrease after initiative 655 passed in 1995. They don't give a detailed account of the effect of I655 on the bear population to date.
What they do talk about is protecting private and state trees from damage by bears. That because lethal measures aren't as "popular" that the alternative is to set up feeding stations in the forest in order to lure bears away from tree farms. There are, as of 1999, 900 feeding stations in Western Washington.
As I mentioned above, restrictions on big cat hunting has been partially reduced. I don't know if the same is true of bear hunting. Currently there is a two bear limit and and a three month season on bears iirc. I'm not a bear hunter so I don't know if that's a change from 1995.
After reading the link you gave I see that there needs to be more information. That's pretty much always the case when you're working anything that's not addition.
The difference between how Oregon and Washington dealt with their initiatives is fairly revealing. The Washington State Harvest is up slightly and the population is steady or increasing somewhat.
The increase in nuisance bear complaints is related to improved reporting of nuisance complaints and increasing human densities.
Oregon, on the other hand has had a reduction in harvest of 19% But they also say the population is steady or increasing.
The public perceives that the bear population has exploded, and human safety is a big concern. However, data indicate the population is stable to increasing, but OF&W does not have adequate techniques for estimating bear population numbers.
Oregon has also increased bag limit (4 bears in Western Oregon) and lengthened the hunting season. They also have an in the act of predation law that allows property owners to shoot nuisance bears. That probably predates the baiting ban, but I don't know for sure.
But the kicker is that Oregon fish and game attributes the increase in nuisance reports to increased awareness as Washington does.
OF&W attributes the increase in nuisance complaints to increased awareness of bears and bear conflicts as a result of the referendum. Complaints are highest in years when natural foods are low. Nuisance bear complaints are related to concerns for human safety (increased from 0 to 20 complaints) and damage to timber or agriculture. Property owners are allowed to shoot or trap a bear if it is causing a conflict. In 1999, 269 bears involved in nuisance activities were destroyed.
They don't give specific pre and post ban harvest numbers as Washington does. So we don't know what that 19% decrease means. Is the 269 number of nuisance bears destroyed an increase from before the ban? Would that explain the reports that the bear population is stable?
It is completely reasonable to link an increase in bear encounters with an increased bear population. From what you've supplied it sure looks like Oregon should have a larger bear population. But our friends at Oregon fish and wildlife are dropping the ball on meaningful population studies.
It looks like a case of asking questions just generates more questions.