Differential inflation, Phillips curves, and price competitiveness in a new euro-member country

Abstract

This article analyzes the inflation process before and after a new country with a middle-income joined the eurozone. It starts with comparative price level gaps in the European single market and with a reformulated basic macroeconomic model for a country adopting the euro. The inflation process in Slovenia is analyzed with the Phillips curve. The Phillips curve before adoption of the euro is a classical equation with the NAIRU and the nominal exchange rate as a control variable. It was expected that the Phillips curve would have to be modified after the euro was adopted. The Phillips curve after the euro was adopted should take into account the initial comparative price level gap, the law of one price, and the Balassa effect. The result is higher differential inflation; that is, national inflation is higher compared with the rate in the eurozone. Differential inflation may have a detrimental effect on export-driven catch-up growth. Instruments for taming inflationary pressure could include a higher unemployment rate and lower growth of labour unit costs.