Ziltener, Patrick, Daniel Künzler, and André Walter. “Research Note: Measuring the Impacts of Colonialism: A New Data Set for the Countries of Africa and Asia”. Journal of World-Systems Research 23, no. 1 (February 28, 2017): 156-190. Accessed October 21, 2021. https://jwsr.pitt.edu/ojs/jwsr/article/view/683.