National Graduate Institute for Policy Studies
Bank of Japan
Keio University and CAMA, ANU
抄録
This paper introduces financial market frictions into a standard New Keynesian model through search and matching in the credit market. Under such financial market frictions, a second-order approximation of social welfare includes a term involving credit, in addition to terms for inflation and consumption. As a consequence, the optimal monetary and macroprudential policies must contribute to both financial and price stability. This result holds for various approximated welfares that can change corresponding to macroprudential policy variables. The key features of optimal policies are as follows. The optimal monetary policy requires keeping the credit market countercyclical against the real economy. Commitment in monetary and macroprudential policy, rather than approximated welfare, justifies history dependence and pre-emptiveness. Appropriate combinations of macroprudential and monetary policy achieve perfect financial and price stability.
Optimal Macroprudential Policy
wp048.pdf
(285.66KB)
