Ida Busnetty, Heru Kurniawan Susilo, Soeharjoto and Acep R Jayaprawira 2022. BANK SYARIAH INDONESIA EFFICIENCY ANALYSIS BEFORE AND AFTER THE MERGER: TWO STAGE DATA ENVELOPMENT ANALYSIS. International Journal of Educational Review, Law And Social Sciences (IJERLAS). 3, 1 (Dec. 2022), 208–222. DOI:https://doi.org/10.54443/ijerlas.v3i1.599.