The econometric consequences of nonstationary data have wide-ranging implications for empirical research in economics. Specifically, these issues have implications for the study of empirical relations such as a money demand function that links macroeconomic aggregates: real money balances, real...

Renewed interest in fiscal policy has increased the use of quantitative models to evaluate policy. Because of modelling uncertainty, it is essential that policy evaluations be robust to alternative assumptions. We find that models currently being used in practice to evaluate fiscal policy...