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Forecasting CPI inflation under economic policy and geopolitical uncertainties

Author

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  • Shovon Sengupta

    (SUAD_SAFIR - SUAD - Sorbonne University Abu Dhabi, BITS Pilani - Birla Institute of Technology and Science, Fidelity Investments)

  • Tanujit Chakraborty

    (SUAD_SAFIR - SUAD - Sorbonne University Abu Dhabi)

  • Sunny Kumar Singh

    (BITS Pilani - Birla Institute of Technology and Science)

Abstract

Forecasting consumer price index (CPI) inflation is of paramount importance for both academics and policymakers at central banks. This study introduces the filtered ensemble wavelet neural network (FEWNet) to forecast CPI inflation, tested in BRIC countries. FEWNet decomposes inflation data into high- and low-frequency components using wavelet transforms and incorporates additional economic factors, such as economic policy uncertainty and geopolitical risk, to enhance forecast accuracy. These wavelet-transformed series and filtered exogenous variables are input into downstream autoregressive neural networks, producing the final ensemble forecast. Theoretically, we demonstrate that FEWNet reduces empirical risk compared to fully connected autoregressive neural networks. Empirically, FEWNet outperforms other forecasting methods and effectively estimates prediction uncertainty due to its ability to capture non-linearities and long-range dependencies through its adaptable architecture. Consequently, FEWNet emerges as a valuable tool for central banks to manage inflation and enhance monetary policy decisions.

Suggested Citation

  • Shovon Sengupta & Tanujit Chakraborty & Sunny Kumar Singh, 2024. "Forecasting CPI inflation under economic policy and geopolitical uncertainties," Post-Print hal-05056934, HAL.
  • Handle: RePEc:hal:journl:hal-05056934
    DOI: 10.1016/j.ijforecast.2024.08.005
    Note: View the original document on HAL open archive server: https://hal.science/hal-05056934v1
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    Keywords

    Inflation forecasting Wavelets Neural networks Empirical risk minimization Conformal prediction intervals;

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