I analyze the rapidly growing literature about systemic risk in financial markets and find an important commonality. Systemic risk is regarded to be an endogenous outcome of interactions by rational agents on imperfect markets. Market imperfections give rise to systemic externalities which cause...

We merge a financial market model with leverage-constrained, heterogeneous agents with a reduced-form version of the New-Keynesian standard model. Agents in both submodels are assumed to be boundedly rational. The fi nancial market model produces endogenously arising boom-bust cycles. It is also...