New data on individual worker’s outputs show that New England ring spinners exhibited substantial on the job learning c. 1905. Despite this, variable capital-labour ratios meant high labour turnover reduced aggregate labour productivity only fractionally. The combination of variable...

The paper evaluates the performance of three popular monetary policy rules when the central bank is learning aboutthe parameter values of a simple New Keynesian model. The three policies are: (1) the optimal non-inertial rule; (2)the optimal history-dependent rule; (3) the optimal price-level...