
https://www.brookings.edu/techstream/how-do-recommender-systems-work-on-digital-platforms-social-media-recommendation-algorithms/

https://www.conference-board.org/pdfdownload.cfm?masterProductID=43455

https://static1.squarespace.com/static/56eddde762cd9413e151ac92/t/598c8b62be42d6f7f8e30ebe/1502382968482/John+Myers+-+YIMBY+-+Final.df