A new study confirms that black men and women are treated differently in the hands of law enforcement. They are more likely to be touched, handcuffed, pushed to the ground or pepper-sprayed by a police officer, even after accounting for how, where and when they encounter the police.

But when it comes to the most lethal form of force — police shootings — the study finds no racial bias.

“It is the most surprising result of my career,” said Roland G. Fryer Jr., the author of the study and a professor of economics at Harvard. The study examined more than 1,000 shootings in 10 major police departments, in Texas, Florida and California.

The result contradicts the image of police shootings that many Americans hold after the killings (some captured on video) of Michael Brown in Ferguson, Mo.; Tamir Rice in Cleveland; Walter Scott in South Carolina; Alton Sterling in Baton Rouge, La.; and Philando Castile in Minnesota.