School shootings are often motivated by the perpetrators' desire for media attention and notoriety. As school shootings receive intense regional and national media coverage, a high likelihood for copycat attacks can be expected. We investigate whether a copycat effect can be detected in US state-level school shooting data from 1990 to 2017. We do so by estimating spatio-temporal panel count models and control for socio-economic characteristics, as well as state and Federal gun control laws. Positive spatial and temporal dependence indicate that the risk for additional school shootings in the same and neighboring states increases after the initial attack.

中文翻译：

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使用时空面板计数模型检测学校枪击事件中的模仿效应

学校枪击案的动机通常是肇事者希望获得媒体关注和声名狼藉。由于学校枪击事件受到地区和国家媒体的广泛报道，因此可以预期模仿攻击的可能性很高。我们调查是否可以在 1990 年至 2017 年的美国州级学校枪击数据中检测到模仿效应。我们通过估计时空面板计数模型和控制社会经济特征以及州和联邦枪支管制法律来进行调查. 正的空间和时间依赖性表明，在最初的袭击之后，同一州和邻近州发生额外学校枪击事件的风险会增加。