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Analysis of Factors Affecting the Position of Indonesia's Foreign Exchange Reserves with ECM Model Sihombing, Pardomuan Robinson; Putu Widya Adnyani, Luh; Sundari, Marta; Huda, Miftahul; Hidayat, Syamsul
Jurnal Media Komunikasi Ilmu Ekonomi Vol 42 No 2 (2025): MELATI: Jurnal Media Komunikasi Ilmu Ekonomi Desember 2025
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Institut Teknologi dan Bisnis Ahmad Dahlan Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58906/melati.v42i2.306

Abstract

A Foreign exchange reserves are a vital instrument in maintaining Indonesia's macroeconomic stability, particularly in mitigating external turmoil and stabilizing the rupiah exchange rate. This study aims to analyze the factors that affect Indonesia's foreign exchange reserves position for the period from January 2022 to August 2025 using the Error Correction Model (ECM) method. Independent variables used include the Consumer Price Index (CPI), the rupiah exchange rate against the US dollar (IDR/$), and the policy rate (BI Rate). Data was obtained from the publication of Indonesian Economic and Financial Statistics (SEKI) of Bank Indonesia. The results of the Dickey-Fuller Augmented Stationarity test showed that all variables were stationary at the first difference, while the Engle-Granger co-integration test confirmed the existence of a long-term relationship between the variables. The results of the estimation indicate that, in the long term, no variables have a significant impact on foreign exchange reserves. However, in the short term, the exchange rate has a positive and significant influence, while the policy rate has a negative and significant effect on Indonesia's foreign exchange reserves. A value speed of adjustment indicates that short-term imbalances are corrected towards long-term equilibrium each month, indicating a swift adjustment mechanism.
The Effect of Ethanol Addition to Gasoline Fuel: A Comprehensive Analysis of Performance, Emissions, and Material Compatibility Based on Literature Studies Sihombing, Pardomuan Robinson
International Journal of Economics, Science, and Education Vol. 3 No. 1 (2026): International Journal of Economics, Science, and Education (IJESE)
Publisher : CV Pena Jaya Pers

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65254/ijese.v3i1.49

Abstract

Background: Using bioethanol as an oxygenate additive in gasoline shows an increasing trend driven by the need for renewable fuels and efforts to mitigate exhaust emissions. Purpose: This study aims to conduct a critical and comprehensive synthesis of the positive and negative impacts of ethanol addition, focusing on engine performance, exhaust emissions, and material compatibility. Design/methodology/approach: The method used was a systematic literature review of primary scientific journals indexed by Scopus and SINTA. Findings: The analysis results show a dualism of impacts: on the one hand, adding ethanol consistently increases engine torque and power and significantly reduces carbon monoxide (CO) and hydrocarbon (HC) emissions. On the other hand, this is offset by the potential for increased fuel consumption due to the lower energy density of ethanol, ambiguous effects on nitrogen oxide (NOx) emissions, and the emergence of serious challenges related to corrosion of metal components and degradation of elastomer materials. Implication: These findings imply that adopting ethanol blends requires a holistic approach, including engine design optimization and improved material specifications in fuel systems to ensure long-term durability and safety. Paper type: Literature review
Projected Benefits Of The Free Nutritious Meals Program In Indonesia: A Comparative Analysis Based On Social Justice Theory And Human Capital Sihombing, Pardomuan Robinson
International Journal of Economics, Science, and Education Vol. 2 No. 6 (2025): International Journal of Economics, Science, and Education (IJESE)
Publisher : CV Pena Jaya Pers

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65254/ijese.v2i6.50

Abstract

Background: Indonesia faces a paradoxical development phenomenon: intense and persistent economic growth, high child poverty rates, and stunting prevalence. The government initiated the Free Nutritious Meals Program (FNMP/ MBG) in response. Purpose: This study aims to analyze the projected multisectoral benefits of the MBG program. The method used is a theoretical qualitative literature review, framed by Human Capital Theory and Justice as Fairness Theory. Design/methodology/approach: A comparative analysis was conducted on school feeding programs in Brazil (PNAE), China (NNIP-RCES), and Japan (Kyūshoku). Findings: The results show that international programs have had a significant impact: PNAE in Brazil has empowered the local farming economy, NNIP-RCES in China has measurably improved academic achievement, and Kyūshoku in Japan has integrated nutrition with character education. Implication: These findings imply that MBG has the potential to be a strategic investment that not only improves nutrition but also enhances educational outcomes, stimulates the local economy, and functions as an instrument of fundamental social justice in Indonesia
Penerapan Metode Machine Learning dalam Klasifikasi Risiko Kejadian Berat Badan Lahir Rendah di Indonesia Pardomuan Robinson Sihombing; Istiqomatul Fajriyah Yuliati
MATRIK : Jurnal Manajemen, Teknik Informatika dan Rekayasa Komputer Vol. 20 No. 2 (2021)
Publisher : Universitas Bumigora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30812/matrik.v20i2.1174

Abstract

Penelitian ini akan mengkaji penerapan beberapa metode machine learning dengan memperhatikan kasus imbalanced data dalam pemodelan klasifikasi untuk penentuan risiko kejadian bayi dengan BBLR yang diharapkan dapat menjadi solusi dalam menurunkan kelahiran bayi dengan BBLR di Indonesia. Adapun metode meachine learning yang digunakan adalah Classification and Regression Tree (CART), Naïve Bayes, Random Forest dan Support Vector Machine (SVM). Pemodelan klasifikasi dengan menggunakan teknik resample pada kasus imbalanced data dan set data besar terbukti mampu meningkatkan ketepatan klasifikasi khususnya terhadap kelas minoritas yang dapat diihat dari nilai sensitivity yang tinggi dibandingkan data asli (tanpa treatment). Selanjutnya, dari kelima model klasifikasi yang iuji menunjukkan bahwa model random forest memberikan kinerja terbaik berdasarkan nilai sensitivity, specificity, G-mean dan AUC tertinggi. Variabel terpenting/paling berpengaruh dalam klasifikasi resiko kejadian BBLR adalah jarak dan urutan kelahiran, pemeriksaan kehamilan, dan umur ibu
Co-Authors Abdul Gofur Rochman Ade Famalika Ade Famalika Ade Marsinta Arsani Ade Marsinta Arsani Ade Marsinta Arsani Ade Marsinta Arsani Ade Marsinta Arsani Ade Marsinta Arsani Ade Marsinta Arsani Ade Marsinta Arsani Ade Marsinta Arsani Adina Astasia Ahid Nur Istinah Ahmaddien, Iskandar Aji, Lexi Jalu Al Aqilah, Muhamad Refkhi Amin Prawiro Madhani Anang Kurnia Anita, Tiurida Lily Arsani, Ade Marsinta Artha Satwika Astawa, I Gede Putu Banu Avior Ocean Noya Bagus Sartono Bekti Endar Susilowati Bekti Endar Susilowati Bekti Endar Susilowati Bertho Tantular Bungkus Sasongko Purnomo Bungkus Sasongko Purnomo Busminoloan Busminoloan Cahya Alkahfi Daqiqil Id, Ibnu Deden Achmad Sunarjo Desak Ari Gita Wahyuni Deva A. Nurul Huda Devitama Patria Nagara Dhinnessa Prabowo DRAJAT INDRA PURNAMA Drajat Indra Purnama Dwi Muslianti Dyah Purwanti Ekowati Retnaningsih Erfiani Erfiani Erfiani Erfiani, Erfiani Erica Indryani Fadlol Muhammad Fajar Faiza Aina Nurrizqi Feri Fernandes Fitri Mudia Sari Frisca Adriana Gregorius Ivan Aditya Purwahendra Gultom, Yulifar Amin Gunawan, Ghina Hanifa HAMIDAH Hastoro Dwinantoaji Hema Malini, Hema Hendiva Tri Nugraha Hendry Frananda, Hendry Herman, Nur Ashilah Raihanah I Dewa Gede Sunanjaya I Gede Heprin Prayasta I Gede Heprin Prayasta Ida Ayu Candrawati Ida Ayu Candrawati Iis Hayyun Nurul Islam Ine Ratna Dewi Irma Nurmala Dewi Istiqomatul Fajriyah Yuliati Istiqomatul Fajriyah Yuliati Jaka Wijaya Kusuma Januar Ramadhan Karel Fauzan Hakim Kartika Maulidya Irzain Khairil Anwar Notodiputro Krisdianto, Boby Febri Kuat Sidik Wahyono Kurnia, Anang Leni Merdawati Lina Sari Lisna Sari Lisna Sari Luh Putu Widya Adnyani Mahuda, Isnaini Marta Sundari Marta Sundari Maryani, Sri Masruri Mochtar Maydita Ayu Nursaskiawati Mella Anisa Miftahul Huda Miftakhul Jannah Mohamad Arif Kurniawan Mohamad Arif Kurniawan Muchtar, Masruri Muhammad Hafiz Fadhilah Muhammad Heru Akhmadi Muhammad Ramadhan Zulfi Muliantino, Mulyanti Roberto Mun'im, Akhmad Neni Nur Laili Ersela Zain Ng, Kah Choon Ni Kadek Sinarwati Novitha, Irni Nurhidayati Nurhidayati Nurhidayati Nurhidayati Nuryanto Nuryanto Oki Prasetia Hendarsin Padhilah Dikri Pascal, Emilio Pradita Galih Sekar Palupi Puput Puspito Rini Putri Indi Rahayu Putu Pande Wahyu Diatmika Putu Widya Adnyani, Luh Rahayu, Putri Indi Rahmi Lathifah Islami Rama Bhaskara Praja Ramadhisa Fadli, Diva Aisyaliani Rini Rahani Risqi Nurika Fatha Hidayati Saeful Hidayat Sarah Sholikhatun Risma Septie Wulandary Sigit Budiantono Sigit Budiantono Sigit Budiantono Sigit Budiantono Sigit Budiantono Simbolon, Zefanya Grace Enos Sinarta Putra P. Surbakti Sodiqin, Achmad Sri Murdaningrum Stephanus, Matthew Sundari, Marta Supriatna, Yayat Suryadiningrat Suryadiningrat Suryadiningrat SYAMSUL HIDAYAT Taufik Febriyanto Temy Setiawan, Temy Triana Mauliasih Aritonang Triana Mauliasih Aritonang Ulfa Anggraini Usep Nugraha Wahyu Puji Lestari Widdia Angraini Wijaya, Lianna Wiradinata Lambok Silaban Wiranegara, Hanny Wahidin Wisnu Pratiko Y Yunita Yanti, Ni Komang Semara Yesi, Desri Yoshep Paulus Apri Caraka Yuda Yudhie Andriyana Yuninda Anggraini Putri Yunita Yunita Yunita Zain Yudha Prawira Zakir, Supratman