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All Journal Jurnal Aplikasi Statistika & Komputasi Statistik
Meirinda Fauziyah
Statistics Study Program, Department of Mathematics, Faculty of Mathematical and Natural Sciences, Mulawarman University, Samarinda, Indonesia
Computer Science & IT Decision Sciences, Operations Research & Management Mathematics

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Examining the Local Effects of Food Security Index Components Across Kalimantan Using Geographically Weighted Regression Meirinda Fauziyah; Raditya Arya Kosasih; Ayu Bahriah; Suyitno; Andrea Tri Rian Dani
Jurnal Aplikasi Statistika & Komputasi Statistik Vol 18 No 1 (2026): Jurnal Aplikasi Statistika & Komputasi Statistik
Publisher : Politeknik Statistika STIS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34123/jurnalasks.v18i1.971

Abstract

Introduction/Main Objectives: Food security remains a critical concern across Kalimantan Island, where substantial spatial disparities exist among its 56 regencies and cities, making conventional global regression models inadequate for capturing localized differences. Background Problems: This study addresses the limitation of Multiple Linear Regression in accounting for spatial heterogeneity in the relationships between Food Security Index components and the overall index, raising the question of which components exhibit spatially varying local effects across locations. Novelty: This study presents the first spatially explicit analysis of food security determinants at the regency and city level across Kalimantan, employing Haversine distance combined with adaptive Gaussian kernel weighting within GWR a combination not previously applied in this context. Research Methods: GWR was applied to cross-sectional 2024 data from the Food Security and Vulnerability Atlas, incorporating Cross Validation bandwidth selection and Weighted Least Squares parameter estimation. Finding/Results: The GWR model outperformed MLR with an R² of 59.63% and MSE of 38.5241. The ratio of population per health worker and average years of schooling for women were the most spatially dominant components, significant in 45 and 43 locations respectively, supporting the need for location-specific policy interventions across Kalimantan.
Co-Authors Andrea Tri Rian Dani Ayu Bahriah Raditya Arya Kosasih Suyitno