Harmoni Economics: International Journal of Economics and Accounting
Vol. 3 No. 1 (2026): Harmoni Economics: International Journal of Economics and Accounting

Effect of Good Corporate Governance on Mining Firm Financial Performance: Company Size Moderation, Indonesia 2021–2024

Siti Nurmala Lubis (Universitas Sumatera Utara)
Azhar Maksum (Universitas Sumatera Utara)
Keulana Erwin (Universitas Sumatera Utara)



Article Info

Publish Date
14 Feb 2026

Abstract

A company's financial performance is a key indicator in assessing management's success in managing company resources and creating shareholder value. This study aims to analyze the influence of Good Corporate Governance mechanisms, as proxied by the size of the board of commissioners, the board of directors, the audit committee, and institutional ownership, on company financial performance, and to examine the role of company size as a moderating variable. The population in this study was mining sector companies listed on the Indonesia Stock Exchange (IDX) for the 2021–2024 period. Based on purposive sampling criteria, a sample of 36 companies was obtained, with a total of 112 observations. The data used were secondary data, and the analytical method employed was panel data regression with a fixed effects model and moderation analysis. The results showed that the size of the board of commissioners had a positive and significant effect on financial performance, while the size of the board of directors, the audit committee, and institutional ownership did not significantly influence financial performance. Furthermore, company size did not moderate the effect of the size of the board of commissioners, the board of directors, the audit committee, and institutional ownership on financial performance.

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Journal Info

Abbrev

HarmoniEconomics

Publisher

Subject

Description

(Harmoni Economics: International Journal of Economics and Accounting) [e-ISSN : 3063-8712, p-ISSN : 3063-6205] is an open access Journal published by the IFREL (International Forum of Researchers and Lecturers). Harmoni Economics accepts manuscripts based on empirical research results, new ...