. . . The study, titled “Public Mass Shooters and Firearms: A Cross-National Study of 171 Countries,” concluded that “The United States and other nations with high firearm ownership rates may be particularly susceptible to future public mass shootings, even if they are relatively peaceful or mentally healthy according to other national indicators....”
Yes, this study is junk. It is not reproducible as the author is withholding the data and even methods used. Reproducibility is a core concept of scientific research. If this work was government funded, such as through the NIH, the author is also likely violating the terms of his research grant.