A landmark result in the optimal monetary policy design literature is that fundamental-based interest rate rules invariably lead to rational expectations equilibria (REE) that are not stable under adaptive learning. In this paper, we make a novel information assumption that private agents cannot...

An agent's productivity depends on his responsiveness to existing incentives ("drive"). Over the long term, this heterogeneity in drive may create significant incentives for the agent to work hard even with vanishingly small amount of existing incentives, explicit or implicit.