Ayal Feinberg, Regina Branton and Valerie Martinez-Ebers write:

Using the Anti-Defamation League’s Hate, Extremism, Anti-Semitism, Terrorism map data (HEAT map), we examined whether there was a correlation between the counties that hosted one of Trump’s 275 presidential campaign rallies in 2016 and increased incidents of hate crimes in subsequent months.

To test this, we aggregated hate-crime incident data and Trump rally data to the county level and then used statistical tools to estimate a rally’s impact. We included controls for factors such as the county’s crime rates, its number of active hate groups, its minority populations, its percentage with college educations, its location in the country and the month when the rallies occurred.

We found that counties that had hosted a 2016 Trump campaign rally saw a 226 percent increase in reported hate crimes over comparable counties that did not host such a rally.

Of course, our analysis cannot be certain it was Trump’s campaign rally rhetoric that caused people to commit more hate crimes in the host county. However, suggestions that this effect can be explained through a plethora of faux hate crimes are at best unrealistic. In fact, this charge is frequently used as a political tool to dismiss concerns about hate crimes. Research shows it is far more likely that hate crime statistics are considerably lower because of underreporting.

Additionally, it is hard to discount a “Trump effect” when a considerable number of these reported hate crimes reference Trump. [Continue reading…]