https://thenextweb.com/privacy/2019/10/01/facebook-election-interference-study-delayed-over-privacy-concerns/

Facebook’s plans to open up its data vault for researchers to analyze the platform’s influence on elections has run into privacy concerns.

In April 2018, the social media giant announced a new initiative to share a database of URLs its users have linked to between January 1, 2017 to February 19, 2019.