Not only in the classic Arrow-Debreu model, but also in many mainstream macro models, an implicit assumption is that all agents honour their obligations, and thus there is no possibility of default. That leads to well-known problems in providing an essential role for either money or for...

This paper proposes a measure of financial fragility that is based on economic welfare in a general model calibrated against UK data. The model comprises a household sector, three active hetrogeneous banks, a central bank/regulator, incomplete markets and endogenous default. We address the...