Determinants of Low Inflation in an Emerging, Small Open Economy through the Lens of Aggregated and Disaggregated Approach

摘要

We analyze the sources of the protracted period of exceptionally low inflation in the emerging, small open economy of Poland using a structural Bayesian Vector Autoregression (BVAR) identified with a mixture of zero and sign restrictions. We find that excessive disinflation has been caused by deteriorating domestic conditions whilst deflation has resulted from the convolution of waning global demand and plummeting oil prices. Disaggregated analysis corroborates the conclusion from the aggregated approach but reveals considerable heterogeneities in the sensitivity of inflation components to the identified shocks. We conclude that the structural analysis on the disaggregated price indices unveils additional information for the monetary policy conduct.