Gönül, İbrahim Ömer; Omay, Tolga - In: Borsa İstanbul Review 25 (2025) 6, pp. 1645-1662
This study develops a comprehensive econometric framework for assessing market efficiency in sustainability indices through rolling fractional integration analysis. We employ four fractional integration estimators (Andrews-Guggenberger, Robinson GSE, GPH, and FELW) with formal statistical...