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All Journal Jurnal Ilmiah Ilmu Terapan Universitas Jambi Commodities, Journal of Economic and Business
Geisth, Salju Indara Zeith
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Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering

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REFURBISHING SUPPLY CHAIN OPTIMIZATION UNDER CAP-AND-TRADE POLICY: A COMPARATIVE ANALYSIS OF DISTRIBUTION CHANNEL STRATEGIES Pratama, Yogi Pasca; Kurdhi, Nughthoh Arfawi; Sistriatmaja, Muhammad Bagus; Oktora, Beny Trias; Geisth, Salju Indara Zeith
Jurnal Ilmiah Ilmu Terapan Universitas Jambi Vol. 10 No. 1 (2026): Volume 10, Nomor 1, February 2026
Publisher : LPPM Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jiituj.v10i1.52985

Abstract

To advance the circular economy, refurbishing activities are essential to mitigate industrial waste. While cap-and-trade policies regulate greenhouse emissions, their mathematical interactions with refurbishing distribution strategies remain under-researched. This study assesses the implications of distribution structures on profitability under environmental constraints. Two multivariable optimization models were developed: Model C (direct distribution) and Model M (indirect distribution via a retailer). Objective functions were optimized for price and production volume under cap-and-trade constraints. A sensitivity analysis of 15 parameters employed partial derivatives to determine the profit function's rate of change relative to market potential (Q), price elasticity (λ), cannibalization (β), and carbon costs. Model C yielded a higher optimum value ($165,796) than Model M ($124,341). Sensitivity analysis identified Q as having the highest positive gradient. Conversely, profits exhibited high sensitivity to λ and β, where incremental coefficient increases led to non-linear margin deterioration. Mathematically, optimal pricing proved nearly inelastic to carbon price fluctuations, suggesting that production costs and demand coefficients dominate the profit function's Hessian matrix. Model C maintained lower pricing for new ($370,219) and refurbished items ($220,163) compared to Model M ($555,109 and $330,081). This study demonstrates that direct distribution mitigates “double marginalization” in multi-tier chains. Mathematically, firms should prioritize optimizing market parameters (λ, β) over carbon-cost mitigation. Furthermore, policymakers must recognize that cap-and-trade programs may drive industries toward vertical integration to achieve mathematical optimality.
From Isolation to Momentum: Understanding Natuna’s Village Development Through Circular Causation Pratama, Yogi Pasca; Puspitasari, Dinarjati Eka; Wang, Hurng-Jyuhn; Yogi, Anang Pra; Geisth, Salju Indara Zeith; Nariswari, Hastin
Commodities, Journal of Economic and Business Vol. 6 No. 2 (2025): October 2025
Publisher : FKDP (Forum Komunikasi Dosen Peneliti)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59689/commo.v6i2.1357

Abstract

Strategic borderlands and regional development In strategic border regions,?we find a complex politico-geographical dynamic between the imperatives of state territorial security on one hand, and economic under-development on the other. It’s about Natuna?Regency, Indonesia's "front-door" in the North Natuna Sea, which is emblematic of the unique paradox of high resource potential and long-standing development lags. The research examine 77 village units in Natuna to investigate regional development trajectories through Gunnar Myrdal’s perspective of Circular and Cumulative Causation (CCC), exploring the mechanisms of economic “locking” mechanisms of borderland economy. The methodology employs an advanced?k-prototype clustering algorithm to interpret high-dimensional Podes 2025 secondary data. This model uses mixed-type variables (i.e., digital, infrastructure or the presence of BTS and signal strength), economic facilities (credit access/KUR) as well as environmental?risk factor to analyze spatial-economic disparities. The analysis reveals three clusters-Growth Poles (Bunguran Timur), with a?"virtuous cycle" of digital-institutional synergy, The Agricultural Periphery in the form of a "backwash effect," associated with logistical bottlenecks, and Isolated Maritime Units facing cumulative decay. The study reveals that borderland resilience cannot be solely attributed to physical infrastructure but to the management of the compounded effect of innovation. The present research provides a strategic blueprint for sub-national governance to harness secondary data for policy-making in critical maritime areas.
Co-Authors Dinarjati Eka Puspitasari Muhammad Bagus Sistriatmaja Nariswari, Hastin Nughthoh Arfawi Kurdhi, Nughthoh Arfawi Oktora, Beny Trias Wang, Hurng-Jyuhn Yogi Pasca Pratama, Yogi Pasca Yogi, Anang Pra