http://www.sciencemag.org/news/2019/09/privacy-concerns-could-derail-unprecedented-plan-use-facebook-data-study-elections

Facebook employees work to reduce the spread of misinformation that could influence elections.

Gary King benefited from perfect timing in selling Facebook on the idea of sharing a treasure trove of its data with academics. But now, the clock is working against efforts by King and others to keep the innovative project—which aims to better understand how information spread on Facebook influences elections and political institutions around the world—from falling apart. The key sticking point: protecting the privacy of Facebook users.