http://d24wuq6o951i2g.cloudfront.net/img/events/458316137/assets/4408d8cf.sbrfebruary2022v8.pdf
https://www.brookings.edu/blog/future-development/2018/04/03/the-middle-productivity-trap-why-are-less-productive-firms-systematically-lagging-behind/?utm_campaign=Brookings%20Brief&utm_source=hs_email&utm_medium=email&utm_content=61867197
https://www.brookings.edu/wp-content/uploads/2022/12/WP82-Hansel-et-al_12.14.pdf
http://www.theglobalipcenter.com/wp-content/uploads/2018/02/GIPC_IP_Index_2018.pdf