Some writers have proposed that under European Monetary Union fiscal policies should be coordinated to reduce the degree of fiscal activism required for macroeconomic stabilization. The paper shows that, in theory, fiscal policy coordination may lower the degree of fiscal flexibility needed to...

This overview examines conditions for reliable economic policy analysis based on econometric models, focusing on the econometric concepts of exogeneity, cointegration, causality, and invariance. Weak, strong, and super exogeneity are discussed in general; and these concepts are then applied to...