This study analyzes the effect of Capital Adequacy Ratio (CAR), bank size (SIZE), and digital transformation efficiency on banking intermediation, as well as the role of digital efficiency as a mediator in state-owned banks and regional development banks in Indone-sia. Annual financial report data from 2010 to 2024 were analyzed using panel data re-gression (CEM) and Sobel's test. Intermediation is measured by LDR, while digital efficien-cy is measured by the ratio of IT costs to total operating costs. The results show that in regional banks, CAR and SIZE have a significant positive effect on intermediation, and digital efficiency mediates this relationship (z = 2.07; p = 0.038; z = 2.42; p = 0.015). Meanwhile, in state-owned banks, digital efficiency only has a direct effect on intermedia-tion without a mediating effect, and NPL is not a distinguishing factor in the intermediation mechanism. These findings emphasize the importance of efficient digital capabilities to drive intermediation, especially in regional development banks.
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