ANALYSIS OF THE LERNER INDEX OF THE HALAL FOOD INDUSTRY IN BANGKA BELITUNG FROM THE PERSPECTIVE OF IBN KHALDUN’S PRICE CONCEPT. (2025). ASY SYAR’IYYAH: JURNAL ILMU SYARI’AH DAN PERBANKAN ISLAM, 10(1), 1-23. https://doi.org/10.32923/asy.v10i1.5101