Tuesday, April 2 at 4:00pm
VanderWerf Hall, 102
27 Graves Place, Holland, MI 49423-3617
“Examining US mass shooting incidents - trends, commonalities, and intensities” by Yew-Meng Koh, Ph.D, Tyler Gast and John McMorris
Mass shootings in the US appear to be random and unpredictable events. However, a closer examination of these events reveals certain trends and commonalities between them. In this study, we classify mass shootings using Principal Component Analysis as well as Factor Analysis. We compare the clustering performance of these two methods and provide conclusions regarding similarities and distinct features between mass shooting incidents which arise from the different clusters of incidents are discussed. Salient variables that help with clustering shooting incidents and their determination are highlighted as well. To address the question on whether shooting incidents are occurring with a significantly different intensity in recent times, we model US mass shooting incidents as a non-homogeneous Poisson process (NHPP). We also utilise the NHPP model for variable selection. Relevant conclusions from various NHPP models will be presented and discussed.