This paper formalizes and solves the problem of a central bank which has a fully structural model (assumed to be true), observes a large number of noisy indicators, and seeks to (1) extract from these indicators estimates of the relevant shocks and state variables of the economy, and (2) conduct...

this is a recent phenomenon.

We study the connections between determinacy of rational expectations equilibrium, and expectational stability or learnability of that equilibrium, in a relatively general New Keynesian model. Adoption of policies that induce both determinacy and learnability of equilibrium has been considered...

Idson (1999).

We investigate the welfare effects of eliminating business cycles in a model with substantial consumer heterogeneity. The heterogeneity arises from uninsurable idiosyncratic uncertainty in preferences and employment status. We distinguish between short- and long-term unemployment. Long-term...