تجمع رزرو و بحران مالی: از حفاظت فردی تا ریسک سیستماتیک

We integrate this idea in a theoretical model of the optimal amount of reserves and illustrate the gap between local and global optimality: the consideration of systemic risk lowers the demand for reserves. Moreover, if a supranational authority determines the optimal level of reserves, it internalizes the negative externality and accumulates fewer reserves. A macroprudential tax on reserve hoardings might implement the socially optimal solution. Our calibration analysis shows that these considerations are economically significant: they lower the optimal amount of reserves in the benchmark case by 45%.