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The Baltic states experienced the most substantial consumer price inflation of any of the EU countries shortly after the COVID-19 pandemic. The year-on-year all-items inflation rate averaged 11% from January 2021 to September 2023, peaking at around 22% in late 2022. This study examines how consumer price rigidity in the region during this period of high inflation differed from the preceding period of low inflation in 2019-2020. We use the detailed price records that underlie the official consumer price indexes to assess the frequency and the size margins of price changes. The average frequency of price changes increased by about four percentage points when inflation was high, as an increase of five percentage points in the frequency of price increases combined with a fall of one percentage point in the frequency of price cuts. The average size of price changes increased by 2.8 percentage points, mainly because the share of price increases changed. We further show that structural shocks in energy prices and aggregate demand contributed significantly to fluctuations in the inflation rate through the frequency of price changes during the period of high inflation. All this points to pricing being state-dependent in the Baltic states.

Keywords: consumer price rigidity, price-setting, high inflation, frequency of price changes.

JEL classification: D40, E31.

Using CPI micro data for 11 euro area countries covering about 60% of the euro area consumption basket over the period 2010-2019, we document new findings on consumer price rigidity in the euro area: (i) each month on average 12.3% of prices change, which compares with 19.3% in the United States; when we exclude price changes due to sales, however, the proportion of prices adjusted each month is 8.5% in the euro area versus 10% in the United States; (ii) differences in price rigidity are rather limited across euro area countries but much larger across sectors; (iii) the median price increase (resp. decrease) is 9.6% (13%) when including sales and 6.7% (8.7%) when excluding sales; cross-country heterogeneity is more pronounced for the size than for the frequency of price changes; (iv) the distribution of price changes is highly dispersed: 14% of price changes in absolute values are lower than 2% whereas 10% are above 20%; (v) the overall frequency of price changes does not change much with inflation and does not react much to aggregate shocks; (vi) changes in inflation are mostly driven by movements in the overall size; when decomposing the overall size, changes in the share of price increases among all changes matter more than movements in the size of price increases or the size of price decreases. These findings are consistent with the predictions of a menu cost model in a low inflation environment where idiosyncratic shocks are a more relevant driver of price adjustment than aggregate shocks.

Keywords: price rigidity, inflation, consumer prices, micro data.

JEL codes: D40, E31.

The views expressed are those of the author(s) and do not necessarily represent those of the Bank of Lithuania.