Nonlinearity in the Debt-Growth Nexus in the EU: Evidence from Dynamic Panel Threshold Regression

This study investigates the impact of public debt on economic growth in a panel of 27 EU economies over the period 2000-2022. As the preliminary analysis suggests a nonlinear relationship between these variables, the debt threshold analysis based on the dynamic panel threshold regression is employed. The results for the whole panel indicate that public debt supports growth below a threshold of 68.7%, but it has a detrimental impact on growth if it is above the threshold. The validity of the findings is confirmed by including the effects of crises, which also indicates that economic growth in countries with debt below the threshold was more resilient to crisis events. The robustness of the estimates is checked using the method of moments quantile regression. However, the analysis of subsamples based on a country's EMU membership and the indebtedness level reveals the variety of debt thresholds, which calls for different fiscal governance across countries to reduce the negative effects of debt on economic growth. Overall, the results emphasize the importance of adequate fiscal space to respond to economic disturbances.