On the real effects of inflation in open economies: theory and empirics

Based on the quarterly data from four open economies (the US, the UK, Canada, and Italy) and estimated correlations and impulse responses within the traditional vector autoregressive (VAR) analysis, we find that inflation, both in the short and long term, negatively affects consumption and investment, and has a positive influence on the current account. We propose an infinite-horizon optimizing model of an open economy with a fixed rate of time preference that explains these empirics. In this type of economy, households consume both durable and non-durable goods, firms operate under costly investment, and all the transactions involving consumption and investment are subject to cash-in-advance (CIA) constraints. Employing the new ‘sign restriction’ identification procedure due to Uhlig (J Mone’t Econ 52(2)381–419, 2005), we corroborate the empirical validity of the proposed model. In order to verify the robustness of our results, we consider another shock, namely, productivity shock in our empirical analysis and find that while productivity shock dominates in the case of the US, inflationary shock has a dominating effect in the case of the UK, Canada, and Italy.