The Optimal Degree of Monetary-Discretion in a New Keynesian Model with Private Information

Ippei Fujiwara, Yuichiro Waki, Richard Dennis

    Research output: Contribution to journalArticle

    Abstract

    This paper considers the optimal degree of monetary-discretion when the central bank conducts policy based on its private information about the state of the economy and is unable to commit. Society seeks to maximize social welfare by imposing restrictions on the central bank's actions over time, and the central bank takes these restrictions and the New Keynesian Phillips curve as constraints. By solving a dynamic mechanism design problem we find that it is optimal to grant "constrained discretion" to the central bank by imposing both upper and lower bounds on permissible inflation, and that these bounds should be set in a history-dependent way. The optimal degree of discretion varies over time with the severity of the time-inconsistency problem, and, although no discretion is optimal when the time-inconsistency problem is very severe, it is a transient phenomenon and some discretion is granted eventually.
    Original languageEnglish
    Pages (from-to)1319-1368
    JournalTheoretical Economics
    Volume13
    Issue number3
    DOIs
    Publication statusPublished - 2018

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