There is nothing stopping the anti-US crowd that wants to infringe on our rights from funding their own studies.
Nothing HAS stopped anti-gun groups like the The Joyce Foundation and others from funding studies that miraculously "prove" their point of view.
During the Clinton years even the United States Center for Disease Control was used in this manner.
If you see the results of an anti-gun study follow the money trail back to the anti-gun groups who paid for it.
The NRA has lists of individuals and groups that are anti-gun, see their web site.