ANALYSIS OF THE LERNER INDEX OF THE HALAL FOOD INDUSTRY IN BANGKA BELITUNG FROM THE PERSPECTIVE OF IBN KHALDUN’S PRICE CONCEPT. Asy [Internet]. 2025 Jun. 30 [cited 2026 Feb. 17];10(1):1-23. Available from: https://rumahjurnal.iainsasbabel.ac.id/asy/article/view/5101