The quest for a fiscal rule: Italy, 1861–1998

The Italian fiscal history is characterised by a number of fiscal consolidations. In this study, we characterise fiscal policy in terms of non-linear deterministic processes. We find that government spending and taxes can be described as being non-linear trend stationary processes instead of unit roots. A long run equilibrium relationship—a non-linear co-trend—does exist between the two series, fulfilling the intertemporal government budget constraint. We interpret this result as evidence of a long run fiscal rule that different policy makers have adopted, putting public finance in balance.Intertemporal government budget constraint, Non-linear trend stationarity, Non-linear co-trending