James Alan Fox, a professor of criminology at Northeastern University, maintains a database on shootings dating back 17 years. He said he’s been studying the topic of shootings for 41 years, and defines a mass shooting as four or more killed in a single event, not including the shooter.

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.

American guns are concentrated in a tiny minority of households: just 3 percent own about half the nation’s guns, according to a 2016 Harvard and Northeastern University study.

And, as Alicia Sasser Modestino, associate professor at Northeastern University, told Insider in a statement, “the recent declines in college enrollment reflect a continuation of long-term trends that have been exacerbated by COVID.”

“In previous studies,” said D’Aquino, who is an undergraduate computer science student at Northeastern University, “people kind of retroactively fit models to observe Turing patterns that they found in the world. 

The Center on Wrongful Convictions and Northeastern University School of Law’s Civil Rights and Restorative Justice Project in Boston filed a petition for executive clemency this month. They are to go before the review board from next month.

Barry Bluestone, a Northeastern University professor who has studied rent control, said those warnings from developers are concerning, but may be overblown. A cornerstone of Wu’s policy is a 15-year carve-out for new construction, which should give plenty of time for developers to recoup their costs on projects and then some.

Trump may well use this rally for “emboldening Far Right forces,” said Edward Miller,  a Northeastern University history professor and author of a book called “Nut Country: Right-Wing Dallas and the Birth of the Southern Strategy.”

In this instance, a chatbot could help manage stress, ensure people are taking their medications, and offer spiritual support, according to a team of researchers at Northeastern University.

A page from the Boston Phoenix with a Sugar Shack ad featuring the Ambitions. COURTESY OF NORTHEASTERN UNIVERSITY ARCHIVES AND SPECIAL COLLECTIONS.

“It is extending the findings of previous work in a way that I think is useful,” said Rachel Rodgers, an associate professor in the Department of Applied Psychology at Northeastern University’s Bouvé College of Health Sciences.