In summary, in a world in which asset price bubbles are very difficult to identify and in which it may be very costly in terms of inflation and output to lean against asset prices, the central bank should remain focused on price stability.
[17]  See for instance Jasova M., C. Mendicino and D. Supera (2018), "Rollover Risk and Bank Lending Behavior: Evidence from Unconventional Central Bank Liquidity", mimeo; Quint, D. and O. Tristani (2017), “Liquidity provision as a monetary policy tool: The ECB’s non-standard measures after the financial crisis”, Journal of International Money and Finance, 80:15-34.