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Inflation in Croatia: a new era of forecasting with machine learning



Jakov Čorak*
   
Mihael Brusan*
Article   |   Year:  2026   |   Pages:  39 - 65   |   Volume:  50   |   Issue:  1
Received:  June 1, 2025   |   Accepted:  October 14, 2025   |   Published online:  March 18, 2026
Download citation        https://doi.org/10.3326/pse.50.1.3       


Table 1
Input features
DISPLAY Table

Figure 1
Illustrative display of the expanding window approach
DISPLAY Figure

Table 2
RMSE in the pre-COVID-19 period for the 3-, 6- and 9-month forecasting horizons
DISPLAY Table

Table 3
RMSE in the post-COVID-19 period for the 3-, 6- and 9-month forecasting horizons
DISPLAY Table

Table 4
RMSE over the full observation period for the 3-, 6- and 9-month forecasting horizons
DISPLAY Table

Figure 2
Forecasted average annual inflation rate by the European Commission compared with forecasts from the SARIMA and LightGBM models (in %)
DISPLAY Figure

Table A1
RMSE expressed as indices relative to the SARIMA model for the pre-COVID-19 period
DISPLAY Table

Table A2
RMSE expressed as indices relative to the SARIMA model for the post-COVID-19 period
DISPLAY Table

Table A3
RMSE expressed as indices relative to the SARIMA model for the full observation period
DISPLAY Table

Table A4
Average RMSE by feature set used
DISPLAY Table

  March, 2026
I/2026

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