We use the German Crisis of 1931, a key event of the Great Depression, to study how depositors behave during a bank run in the absence of deposit insurance. We find that deposits decline by around 20 percent during the run and that there is an equal outflow of retail and nonfinancial wholesale...

We propose a measure for systemic risk: CoVaR, the value at risk (VaR) of financial institutions conditional on other institutions being in distress. We define an institution's (marginal) contribution to systemic risk as the difference between CoVaR and the financial system's VaR. From our...