(2011), “Institutional Cash Pools and the Triffin Dilemma of the U.S. Banking System”, IMF  Working Paper 11/190; Claessens, S. and L. Ratnovski (2014), “What Is Shadow Banking?”, IMF Working Paper 14 /25; Singh M. (2012), “Puts” in the shadow”, IMF Working Paper 12/229; Perotti E. (2013), “The roots of shadow banking”, CEPR Policy Insight 69; Pozsar, Z.
(2014), “ Shadow Banking: The Money View”, Office of Financial Research WP 14–04. 4 See Singh, M. and P. Stella (2012), “Money and Collateral”, IMF Working Paper WP/12/95. 5 See Gorton, G. and P.He (2016), “Optimal monetary policy in a collateralized economy”, NBER Working Paper  No. 22599.