See: www.ecb.europa.eu/pub/fsr/html/index.en.html 4 See for example for a theoretical explanation: Korinek, A. and A. Simsek (2016) “Liquidity Trap and Excessive  Leverage”, American Economic Review 2016, 106(3): 699–738, G. B. Eggertsson and P. Krugman (2012) “Debt, Deleveraging, and the Liquidity Trap: A Fisher-Minsky-Koo Approach”, The Quarterly Journal of Economics, Volume 127, Issue 3, 1 August 2012, Pages 1469–1513.
5 See for example Bean, C., M. Paustian, A. Penalver and T. Taylor (2010), “Monetary Policyafter the Fall,” in  Macroeconomic Challenges: The Decade Ahead, Federal Reserve Bank ofKansas City, Issing, O. (2011), “Lessons for Monetary Policy: What Should the Consensus be?”, IMF Working Paper WP/11/97, April, White, W.R. (2006), “Is price stability enough?”, BIS Working Papers No.