A good portion of many large library collections, such as my own at Northeastern University, are stored in remote storage facilities these days, while many libraries serve widely distributed community members.

James Alan Fox, a statistician and professor of criminology, law and public policy at Northeastern University, helps maintain the Associated Press-USA TODAY-Northeastern database of mass killings in the U.S., which does not contain full data on perpetrators’ gender. The claims on social media this week amount to extreme cherry-picking of data, he said.

Mark Gottlieb, a public health lawyer at Northeastern University, describes how federal drug policy seems almost random, carved into stone by whoever’s in power, oddities of their own times.

Since 2006, 96 percent of 340 mass killings involving a single shooter were committed by men, according to a Washington Post analysis of a database maintained by Northeastern University, the Associated Press and USA Today.

Sources: The Associated Press, USA TODAY, Northeastern University Mass Killings Database.

But it turns out that employers’ own hiring platforms and third-party intermediaries often act as barriers to matching the right talent to the right positions, according to a recent Northeastern University report.

Mass shootings are defined as more than four people dying, not including the perpetrator, according to a database compiled by The Associated Press, USA Today and Northeastern University, in addition to other AP reporting: Of those 15 shootings, 175 people have died, the data shows.

Before Monday’s violence in Nashville, there had been seven mass killings at K-12 schools since 2006 in which four or more people were killed within a 24-hour period, according to a database maintained by The Associated Press and USA Today in partnership with Northeastern University. In all of them, the shooters were males.