The system makes it easier and faster for the police to track firearms and for gun dealers to learn if a person can legally own a firearm.
The operators, with shows from White Plains to Cheektowaga, have also agreed to a broader system to track firearms at their shows and to guard against illegal sales in parking lots.
How many of those rejected buyers were able buy guns without background checks, from private sellers or over the Internet, is difficult to say, in part because restrictions imposed by Congress make it difficult for law enforcement officials to track firearms sales.
Gun-control advocates are hoping to reverse some of the political influence of the National Rifle Association and other gun rights proponents by urging the White House to strip the president's next budget proposal of any provision that limits how federal agencies track firearms.
Bitcoin, the currency that exists only on the Internet and is backed by the confidence of its users, rather than a government or bank, makes it easier for people to buy weapons online without detailed records of those transactions, potentially bypassing new rules put in place by lawmakers to track firearms sales.
Only a single state — California — has a database dedicated to tracking firearm owners who have lost their right to possess a gun, either because of a new criminal conviction or something else.
For weeks, Democrats sought middle ground, offering ways to keep records that didn't give the impression of big brother tracking firearm purchases.
To track it, the researchers turned to a combination of the survey-based Behavioral Risk Factor Surveillance System, and the Web-based Injury Statistics Query and Reporting System, which tracks firearm suicides compared to suicides that did not involve a firearm.
Admati had become interested in means restriction — the theory that suicide attempts can be reduced by making it more difficult for individuals to get access to dangers like unguarded train tracks, firearms, and prescription pills.
As gun culture spreads, local governments have offered to fast-track firearms licenses if men have vasectomies.
