“…This resulted in a surge of interest in theoretical frameworks incorporating financial frictions. Models with imperfect financial markets were used to study important topical issues, like (i) the impact of financial frictions on monetary transmission (Calza et al, 2012;Gerali et al, 2010;Christiano et al, 2010), (ii) optimal monetary policy in the presence of financial frictions (Cú rdia and Woodford, 2009;De Fiore and Tristani, 2009;Carlstrom et al, 2010;Kolasa and Lombardo, 2011), (iii) the impact of financial shocks on the economy (Christiano et al, 2003;Iacoviello and Neri, 2010;Brzoza-Brzezina and Makarski, 2011) or (iv) capital regulations and macroprudential policies (Angelini et al, 2010;Angeloni and Faia, 2009;Meh and Moran, 2010;Jeanne and Korinek, 2010). Finally, it should be mentioned that financial frictions have recently been added to models used for policy purposes at several central banks.…”