Abstract
Working with a small-scale calibrated New-Keynesian model, Coibion and Gorodnichenko (2011)
find that the reduction in trend inflation during Volcker’s mandate was a key factor behind the
Great Moderation. We revisit this finding with an estimated New-Keynesian model with trend
inflation and no indexation based on Christiano, Eichenbaum and Evans (2005). First, our simulations
confirm Coibion and Gorodnichenko’s (2011) main finding. Second, we show that a trend
inflation-immune Taylor rule based on economic theory can avoid indeterminacy even at high levels
of trend inflation such as those observed in the 1970s.