FITRIYANTI, E.; WULANDARI, A.; FAHRIA, I.; KARIMULLAH, S. ANALYSIS OF THE LERNER INDEX OF THE HALAL FOOD INDUSTRY IN BANGKA BELITUNG FROM THE PERSPECTIVE OF IBN KHALDUN’S PRICE CONCEPT. ASY SYAR’IYYAH: JURNAL ILMU SYARI’AH DAN PERBANKAN ISLAM, v. 10, n. 1, p. 1-23, 18 ago. 2025.