Passas C. A contribution to the economic and historical debate on social classes: an empirical investigation of the productive and unproductive labour categories in Greece from 1987 to 2020. SCAD [Internet]. 2022 Sep. 1 [cited 2024 Jul. 17];17(2):149-72. Available from: https://ejournals.epublishing.ekt.gr/index.php/SCAD/article/view/32250