Nabila Arnelis Julian, Asih Murwiati and Vitriyani Tri Purwaningsih 2025. Analysis Of Poverty Gap Index (P1) Districs/Cities On The Sumatera Island By Quantile Regression Approach. International Journal of Economics, Business and Innovation Research. 4, 03 (May 2025), 532-546. DOI:https://doi.org/10.63922/ijebir.v4i03.1783.