Gerard, F.-M., Hugonnier, B. and Varin, S. 2023. Synthetic indicator of the quality of educational systems in OECD countries: comparison of 2015 and 2018 results. The Journal of Quality in Education. 13, 22 (Nov. 2023), 29–51. DOI:https://doi.org/10.37870/joqie.v13i22.390.