Article

Un’Analisi Quantitativa Delle Politiche Di Rientro Dal Disavanzo Pubblico in Italia (A Quantitative Analysis of Alternative Austerity Policies in Italy) (in Italian)

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Abstract

The governments of advanced countries have faced the economic crisis by means of measures that considerably increase their budget deficits. Now they have to absorb these increases, but at the same time supporting recovery. To solve this problem, two different types of intervention have been hypothesized. The first consists of a set of tightening measures devoted to quickly reducing deficit. The second fosters measures devoted to supporting aggregate demand, postponing the reduction of budget deficit to the time when economic activity will grow again. Predictable results of the two hypotheses are determined through an econometric model, changed by modifications simulating, separately, the measures hypothesized in each intervention.

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Article
In this paper we examine tests for cointegration which allow for the possibility of regime shifts. We propose ADF-, Zα-, and Zt-type tests designed to test the null of no cointegration against the alternative of cointegration in the presence of a possible regime shift. In particular we consider cases where the intercept and/or slope coefficients have a single break of unknown timing. A formal proof is provided for the limiting distributions of the various tests for the regime shift model (both a level and slope change). Critical values are calculated for the tests by simulation methods and a simple Monte Carlo experiment is conducted to evaluate finite-sample performance. In the limited set of experiments, we find that the tests can detect cointegrating relations when there is a break in the intercept and/or slope coefficient. For these same experiments, the power of the conventional ADF test with no allowance for regime shifts falls sharply. As an illustration we test for structural breaks in the U.S. long-run money-demand equation using annual and quarterly data.