The Cross Country Mean Firm Size dataset was created by Andrew Kerr of the University of Cape Town as part of a project
entitled “Firm size and Economic Growth in sub-Saharan Africa”, which was funded by the Structural Transformation and
Economic Growth (STEG) initiative.
The data covers 198 countries from 1950 to 2022 and is created from several sources.

Check the full Documentation in PDF: https://www.datafirst.uct.ac.za/dataportal/index.php/catalog/950/pdf-documentation