Blank, J. L. T., A. A. S. Van Heezik, and B. Blank. “Productivity and Efficiency of Central Government Departments: A Mixed-Effect Model Applied to Dutch Data in the Period 2012-2019”. Public Sector Economics - Submission Site, vol. 47, no. 3, Sept. 2023, pp. 335-51, doi:10.3326/pse.47.3.2.