The 2007-9 .financial crisis began with increased uncertainty over funding conditions in money markets. We show that funding uncertainty can explain diverse elements of commercial banks behaviour during the crisis, including:(i) reductions in lending volumes, balance sheets, and...

Banks create excessive systemic risk through leverage and maturity mismatch, as financial constraints introduce welfare-reducing pecuniary externalities.  Macroprudential regulators can achieve efficiency with simple linear constraints on banks' balance sheets, which require less information...