We derive a 2nd-order approximation of optimal policy in a broad class of nonlinear DSGE models. Using a cubic expansion of welfare and a quadratic expansion of the economyís equilibrium conditions, the Quadratic-Cubic (QC) approximation relaxes symmetry in the objective function and certainty...

This paper investigates optimal monetary policy in response to fundamental innovations that affect asset prices. The fundamental innovations considered include productivity, investment efficiency, taste and bankruptcy cost innovations. I find that a central bank can stabilise the economy well...

Climate variability poses a severe threat to subsistence farmers in southern Africa. Two different approaches have emerged in recent years to address these threats: the use of seasonal precipitation forecasts for risk reduction (for example, choosing seed varieties that can perform well for...

Climate variability poses a severe threat to subsistence farmers in southern Africa. Two different approaches have emerged in recent years to address these threats: the use of seasonal precipitation forecasts for risk reduction (for example, choosing seed varieties that can perform well for...