Abstract:In this paper we study fiscal regime shifts for the Spanish Economy, using a new quarterly dataset of Spanish public finance variables for the period 1986-2012(De Castro et al., 2014, within a Markov-Switching framework. First, we estimate fiscal policy rules to characterize the behavior of Spanish fiscal policymakers and, second, we estimate a vector autoregressive model to analyze the effects of a shock to the primary deficit-to-GDP ratio on the Spanish economy. Our results indicate that fiscal policymakers do not seem to track the state of public finances and the evolution of economic activity in both identified regimes; however, they appear to focus on the level of extraordinary expenditure, the responsiveness to which is higher in the first regime than in the second one. Increases in the primary deficit do not succeed in stimulating economic activity; rather, unexpected upsurges in the primary deficit-to-GDP ratio harm economic activity (non-Keynesian effect) in the second regime, which prevails since the ratification of the Maastricht Treaty.