Ascari, GuidoBranzoli, Nicola2018-06-012018-06-012007-08Ascari, Guido e Nicola Branzoli (2007). "Optimal simple rules and the lower bound on the nominal interest rate in the Christiano–Eichenbaum–Evans model of the US business cycle".Portuguese Economic Journal, 6(2):117-1311617-982X (print)1617-9838 (online)http://hdl.handle.net/10400.5/15545Schmitt-Grohé and Uribe (NBER wp 10724, 2004b) analyzes the optimal, simple and implementable monetary policy rules in a medium-scale macromodel, as the one proposed by Christiano et al. (J Polit Econ 113:1–45, 2005). In doing so, they use a sensible, but somewhat arbitrary constraint to account for the lower bound condition on the nominal interest rate. In this work, we check the robustness of their main results to such a criteria. We find that the optimal policies are actually absolutely robust to the easing of this criterion for all the diff erent cases considered.engMonetary policy rules–zero boundNew Keynesian modeljournal article10.1007/s10258-007-0025-x