Weil D S, Knox R C
Center to Prevent Handgun Violence, Washington DC 20005, USA.
JAMA. 1996 Jun 12;275(22):1759-61.
To determine the effect of limiting handgun purchases to 1 per month on the illegal movement of firearms across state lines.
Data from the Bureau of Alcohol, Tobacco, and Firearms firearms trace database were obtained for traces requested for firearms recovered in connection with criminal investigations. The analysis incorporates data on date and location of purchase for 14606 firearms purchased prior to (September 1989 through June 1993) and after (July 1993 through March 1995) enactment of a Virginia law limiting handgun purchases to 1 per month.
Odds of tracing a firearm acquired prior to implementation of the law to Virginia vs another state in the Southeast compared with the odds for firearms acquired after the law took effect.
For firearms recovered anywhere in the United States, 3201 (27%) of 11 876 acquired prior to the implementation of the law and 519 (19%) of 2730 purchased after the law was enacted were traced to Virginia (odds ratio [OR], 0.64; 95% confidence interval [CI], 0.58-0.71). For traces initiated in the northeast corridor (New York, New Jersey, Connecticut, Rhode Island, and Massachusetts), 1103 (34.8%) of 3169 of the firearms acquired before the 1-gun-a-month law took effect and 142 (15.5%) of 919 firearms purchased after implementation were traced to Virginia (OR, 0.34; CI, 0.28-0.41).
Gun control policies involving licensing, registration, and restricting the number of purchases represent efforts to limit the supply of guns available in the illegal market. This study provides evidence that restricting handgun purchases to 1 per month is an effective means of disrupting the illegal interstate transfer of firearms.
确定将每月手枪购买量限制为1支对枪支跨州非法流动的影响。
从酒精、烟草和枪支管理局的枪支追踪数据库中获取与刑事调查相关的枪支回收追踪请求数据。该分析纳入了弗吉尼亚州一项将每月手枪购买量限制为1支的法律颁布之前（1989年9月至1993年6月）和之后（1993年7月至1995年3月）购买的14606支枪支的购买日期和地点数据。
将法律实施前获取的枪支追踪到弗吉尼亚州与东南部其他州的几率与法律生效后获取的枪支的几率进行比较。
对于在美国任何地方回收的枪支，法律实施前购买的11876支中有3201支（27%），法律颁布后购买的2730支中有519支（19%）被追踪到弗吉尼亚州（优势比[OR]，0.64；95%置信区间[CI]，0.58 - 0.71）。对于在东北走廊（纽约、新泽西、康涅狄格、罗德岛和马萨诸塞州）发起的追踪，每月1枪法律生效前购买的3169支枪支中有1103支（34.8%），实施后购买的919支枪支中有142支（15.5%）被追踪到弗吉尼亚州（OR，0.34；CI，0.28 - 0.41）。
涉及许可、登记和限制购买数量的枪支管制政策旨在限制非法市场上的枪支供应。本研究提供了证据表明将每月手枪购买量限制为1支是扰乱枪支非法跨州转移的有效手段。
