For Volker Wieland ECB communication regarding inflation is too narrow (CNBC)
"The ECB has already done a lot regarding inflation", Wieland added. Overall measures of inflation, such as the GDP deflator, have been going up. Therefore, according to Wieland, the risk of deflation is not that high. ECB communication regarding inflation is based on the Harmonized Index of Consumer Prices (HICP).
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CNBC (short version): "ECB's communication has been 'at fault' when it comes to inflation, professor says"