Abstract
In the wake of Brexit and Trump trade war, central banks face the need to reconsider the role of monetary policy in managing the inflationary-recessionary effects of hikes in tariffs. Using a New Keynesian model enriched with global value chains and firm dynamics, we show that the optimal monetary response is expansionary. It supports activity and producer prices at the expense of aggravating short-run headline inflation---contrary to the prescription of the standard Taylor rule. This holds all the more when the home currency is dominant in pricing of international trade.
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