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All Journal CAUCHY: Jurnal Matematika Murni dan Aplikasi Jurnal Kajian Ekonomi dan Manajemen Indonesia
Putri, Lisa Amanda
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Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Mathematics

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Analisis Kelayakan Usaha Budidaya Ikan Cupang Di Kecamatan Lingsar Kabupaten Lombok Barat Putri, Lisa Amanda; Muhsin, Muhsin; Hamsyuni, Muhammad
Jurnal Kajian Ekonomi dan Manajemen Indonesia (JKEMI) Vol. 3 No. 2 (2025): Jurnal Kajian Ekonomi dan Manajemen Indonesia
Publisher : Yayasan Pendidikan Islam Amal Shaleh Kombongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61079/jkemi.v3i2.149

Abstract

Penelitian ini bertujuan untuk menganalisis kelayakan usaha budidaya ikan cupang (Betta splendens) di Kecamatan Lingsar, Kabupaten Lombok Barat. Metode yang digunakan adalah metode deskriptif dengan teknik survei, dan pengambilan data dilakukan secara sensus terhadap 42 pembudidaya ikan cupang di Desa Sigerongan. Data yang dikumpulkan meliputi biaya produksi, penerimaan, pendapatan bersih, serta kendala yang dihadapi dalam proses budidaya. Hasil penelitian menunjukkan bahwa rata-rata pendapatan pembudidaya mencapai Rp13.320.711,9 per tahun, dengan nilai R/C ratio sebesar 2,96, yang berarti usaha budidaya ikan cupang dinyatakan layak untuk dikembangkan. Namun, pembudidaya masih menghadapi berbagai kendala seperti kualitas air yang buruk, serangan penyakit dan parasit, serta keterbatasan modal. Penelitian ini diharapkan dapat menjadi bahan pertimbangan bagi pelaku usaha dan pihak terkait dalam pengembangan usaha budidaya ikan cupang di daerah tersebut.
Spatial Analysis of Child Violence Victims in West Java in 2024 Using Geographically Weighted Negative Binomial Regression Suliyanto, Suliyanto; Amelia, Dita; Putri, Lisa Amanda; Anggakusuma, Aurellia Calista
CAUCHY: Jurnal Matematika Murni dan Aplikasi Vol 11, No 1 (2026): CAUCHY: JURNAL MATEMATIKA MURNI DAN APLIKASI
Publisher : Mathematics Department, Universitas Islam Negeri Maulana Malik Ibrahim Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/cauchy.v11i1.40390

Abstract

Violence against children remains a critical issue in Indonesia, with West Java consistently reporting high numbers of reported child violence victims. This study examines socioeconomic factors associated with the count of reported child violence victims across 27 districts and cities in West Java in 2024, using secondary administrative data obtained from Open Data Jabar. The explanatory variables include poverty rate (X1), average years of schooling (X2), number of divorce cases (X3, Labor Force Participation Rate (X4), and Open Unemployment Rate (X5). Diagnostic tests indicate the presence of spatial heterogeneity and overdispersion, supporting the application of a Geographically Weighted Negative Binomial Regression (GWNBR) model with a child population offset. Model performance comparison based on in-sample fit criteria shows that the GWNBR model provides superior fit (deviance = 42.94, AICc = 99.87) compared to the global Negative Binomial Regression model (deviance = 48.27, AIC = 105.63). The GWNBR results reveal substantial spatial variation: average years of schooling (X2) is statistically significant across all 27 regions, while the number of divorce cases (X3) is significant in 23 regions. Poverty rate (X1) shows localized significance in 16 regions. Labor force participation rate (X4) and unemployment rate (X5) each exhibit significance in 6 regions, though with distinct spatial patterns. These findings highlight geographically varying risk structures that cannot be adequately captured by global models and underscore the importance of spatially adaptive modeling for informing region-specific child protection policies. Although the analysis relies on reported administrative data that may not fully represent the true underlying prevalence of child violence, the results provide valuable spatial insights relevant to policy development aligned with SDG 3, SDG 4, and SDG 16.
Co-Authors Anggakusuma, Aurellia Calista Dita Amelia, Dita Muhammad Hamsyuni Muhsin Muhsin Suliyanto Suliyanto