Both from theoretical and practical viewpoints, I argue that the New Keynesian model's forward-looking IS curve should be derived by quadratic approximation. This leaves uncertainty in the basic three-equation model. After adding exogenous AR(1) processes, I examine the results by numerical...

With non-controllable auto-regressive shocks, the welfare of Ramsey optimal policy is the solution of a single Riccati equation of a linear quadratic regulator. The existing theory by Hansen and Sargent (2007) refers to an additional Sylvester equation but miss another equation for computing the...

We use a standard new Keynesian model to evaluate the cost of disinflation - measured by the sacrifice ratio, the central bank's loss function, and the welfare cost - in a small open economy vis-à-vis a closed economy. Disinflation is either more costly or less beneficial in the small open...

In March 2019, the Reserve Bank of New Zealand was entrusted with a new employment stabilisation objective, that complements its traditional price-stability mandate. Against this backdrop, we assess whether the central bank’s stronger emphasis on the stabilisation of employment, and more...

Typical dynamic general-equilibrium (DGE) models with stochastic productivity, consumers with state-separable (expected utility) preferences, and capital accumulation imply a small welfare cost of business cycles and a small market price of risk (i.e., equity premium). I present an analytical...