This study aims to analyze the influence of Private Investment (a combination of Domestic Direct Investment and Foreign Direct Investment) and Real Per Capita Expenditure on Gross Regional Domestic Product at Constant Prices (GRDP-CP) across 34 provinces in Indonesia. Employing a quantitative approach using secondary data from Statistics Indonesia (BPS) for the 2019–2024 period, the model was estimated via panel data regression using the Panel Estimated Generalized Least Squares (EGLS) method with Cross-section Random Effects. Partial analysis results indicate that the Private Investment variable has a positive and significant effect on GRDP-CP. Similarly, Real Per Capita Expenditure was found to make a highly significant positive contribution to boosting regional economic output. Simultaneously, these two independent variables explain 49% of the variation in regional GRDP-CP movements. These findings offer policy implications for local governments to continue optimizing the non-government investment climate inclusively and maintaining public purchasing power stability to accelerate sustainable regional economic growth.
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