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All Journal JABM JOURNAL of ACCOUNTING - BUSINESS & MANAGEMENT Jurnal Pembelajaran, Bimbingan, dan Pengelolaan Pendidikan
Eddy Suprihadi
Universitas Wisnuwardhana
Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Other

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The Effectiveness of Government Intervention: Indonesia Case Nevi Danila; Eddy Suprihadi; Dwinita Ariyani
Journal of Accounting, Business and Management (JABM) Vol 18 No 1 (2011): April
Publisher : STIE Malangkucecwara

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Abstract

This paper observes the effectiveness of government intervention in Indonesia from market microstructure perspective, especially focusing on the dealers behavior in controlling their inventory by shifting the quotes since the dealers consider their optimal inventory every day, especially when there are events, for example government intervention, that might influence the value of their inventory. Thus, the paper will try to understand how intervention by Indonesia authorities in foreign exchange markets affected the quotation of foreign exchange rates, especially the setting of bid-ask prices. We found that dealers do not consider government intervention as a factor that influences them in controlling their inventory by shifting up and down the quotation. It seems that the intervention is not credible enough, in other words, the intervention is not effective.
Ethnoscience-PjBL for Water Pollution Treatment: Enhancing Chemistry Environmental Understanding and Mathematical Reasoning through Anaerobic Baffled Reactor (ABR) Nurin Fitriana; Anton Prayitno; Eddy Suprihadi; Nurin Fitriana; Anton Prayitno; Eddy Suprihadi
Jurnal Pembelajaran, Bimbingan, dan Pengelolaan Pendidikan Vol. 6 No. 5 (2026)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um065.v6.i5.2026.10

Abstract

Water pollution from heavy metals, organics, and pathogens severely threatens ecosystems and public health, yet chemistry education often remains theoretical, limiting students' grasp of wastewater treatment and quantitative reasoning skills. This study aims to enhance undergraduate students' environmental chemistry understanding covering pollutant characteristics, treatment mechanisms, and Anaerobic Baffled Reactor (ABR) functions and mathematical reasoning through data interpretation, calculations, and modeling via Ethnoscience-Project Based Learning (Ethnoscience-PjBL) integrated with ABR, compared to conventional PjBL. Employing a quasi-experimental design with 74 East Java undergraduates (experimental n=38, control n=36), pre/post-tests, N-Gain analysis, normality (Shapiro-Wilk), homogeneity (Levene's), and ANCOVA (pretest covariate) were used. Results showed the experimental group significantly outperformed controls in chemistry understanding (adjusted mean 85.2 vs. 68.8; difference 16.4, Cohen's d=1.48, large effect; F=4.088, p=0.009), achieving 78.9% COD reduction, pH stabilization from 5.2 to 6.8, and robust reasoning. In conclusion, Ethnoscience-PjBL-ABR bridges local wisdom with engineering, fostering integrated cognitive skills for sustainable pollution solutions and warranting adoption in chemistry curricula worldwide.
Co-Authors Anton Prayitno Dwi Nita Aryani Eddy Suprihadi Nevi Danila Nurin Fitriana Nurin Fitriana