A new report says Silicon Valley’s lack of diversity is hurting black America.

Black Americans are frequent users of technology, and have helped build social media platforms like Twitter and Instagram into the giants they are today. But they aren’t reaping the same economic benefits of the tech boom as white Americans, and low rates of black employment in the tech industry are a large part of the reason why. 

A new study released Friday sheds light on this issue. The State of Black America 2018, a report published annually by the National Urban League, compares how black and white people fare in a number of areas, including housing, economics, education, social justice, and civic engagement.

This year’s report pays particular attention to black Americans’ access to jobs in the tech industry and STEM (science, technology, engineering, and mathematics) fields. The study reveals that while black people are one of the racial groups most likely to use smartphones and have created thriving communities on platforms like Twitter, those high rates of usage haven’t translated into employment.