Purpose. The objective of this study is to analyse the evolution of public expenditure, exports, imports, and gross domestic product (GDP) in Algeria over the past four decades (1980–2022). It aims to measure the impact of each of these macroeconomic variables (public expenditure, imports, and exports) on GDP during the study period, in the long and short term. Additionally, the study intends to identify the most significant economic variables influencing GDP in Algeria by constructing an econometric model (autoregressive model) based on economic theory and previous studies. These variables are considered the driving force and effective activator for improving GDP. Results. The findings obtained using the ARDL bounds testing approach for cointegrated time series revealed the existence of a long-run equilibrium relationship between the independent variables (public expenditure, imports, exports) and the dependent variable (GDP). In the short run, most of the model variables were statistically significant, indicating their influence in explaining GDP. This allows us to conclude that there is a dynamic relationship between the model variables in Algeria during the study period. Additionally, the error correction coefficient was statistically significant at the 5 % level, while the speed of adjustment to equilibrium was 0.8828. Scientific novelty. Research in this field continues to provide new insights into the dynamic relationship between these important economic factors. While this topic has been explored in previous studies, our research distinguishes itself by examining the collective impact of public expenditure, imports, and exports on GDP. This study establishes a direct link between these variables and GDP. Modern studies emphasise the significance of the composition of public expenditure in determining its impact on GDP. Additionally, several studies have demonstrated the influence of exports and imports on GDP. Imports play a crucial role in enhancing production efficiency and reducing costs within the economy. The current study addresses the gap in previous research by simultaneously examining public expenditure, imports, and exports as independent variables, considering both the pre- and post-Algerian economic reforms period. Practical value. This study contributes to understanding economic growth trajectories and how various economic components impact GDP. By analysing the influence of public expenditure, exports, and imports on economic growth, the study offers significant added value. It empowers policymakers at the macroeconomic level to leverage these findings in formulating and implementing effective economic policies that can enhance GDP, thereby promoting economic growth and improving living standards through the management of the study variables such as public expenditure, export values, and imports.
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