Following a conjecture of Kozicki and Tinsley (2002) we generalise the habit formation model of consumption to allow for both a multiplicative utility function and a habit-aspiration function which is a geometrically weighted average of past consumption. The geometric form of the aspiration...

We study the relationship between growth and variability in a DSGE model with nominal rigidities and growth driven by learning-by-doing. We show that this relationship may be positive or negative depending on the impulse source of fluctuations A key role is also played by the Frisch elasticity...

Forward looking agents with expectational errors provide a problem for monetary policy. We show that under such conditions a standard interest rate rule may not achieve determinacy. We suggest a modification to the standard policy rule that guarantees determinacy in this setting, which involves...