Currency misalignments, international trade in intermediate inputs, and inflation targeting

In the literature on optimal monetary policy in open economies, the presence of local- cur-rency pricing provides a rationale for targeting CPI inflation rather than PPI inflation. In this paper, we reexamine this conclusion by incorporating international trade in intermediate inputs into Engel (2011). We find that the cooperative monetary policymaker should target the final-goods output gaps, the PPI inflation rates at both stages of production, the cur-rency misalignments at both stages of production, and the vertical relative price gaps. Welfare analysis shows that the monetary policymaker should target the weighted average intermediate-goods PPI (WPPI) inflation rather than CPI inflation for most combinations of price stickiness at both stages of production.(c) 2023 Elsevier Ltd. All rights reserved.