In this paper we analyze the consequences of model overidentification on testing exogeneity, when maximum likelihood technique for estimation an inference are used. This situation is viewed as a particular case of the more general problem of considering how restrictions on "nuisance" parameters...

Nel commentare l'attribuzione del premio Nobel per l'economia a Trygve Haavelmo, quasi tutti i giornali italiani riportavano la frase "per aver dimostrato come le teorie economiche possano essere provate". Così nonostante le cautele e le smentite degli econometrici sulla capacità della...

Si presentano le diverse utilizzazioni dei test in econometria e si considerano le critiche che ad essi vengono rivolte, in particolare con riguardo alle proprietà statiche di tali procedure. Viene precisato il concetto di replicazione in econometria, cercando di motivare perchè esso non venga...

In this paper we analyse the wage price relationship of an economy in transition characterized by important structural changes. It is known (see Perron 1989) that structural breaks in stationary time series can induce apparent unit roots. The stationarity analysis of the series employed in the...

The aim of this paper is to model the impact of exchange rate both inlation and unemployment variables in economics which are characterized by important structural changes, i.e. A transition phase moving from centralised economies towards market economies. This phenomeno, which is common to east...

In previous studies concerning short and long run relationships for price-wage models, the cointegration analysis has been developed assuming the existence of a unique cointegration parametrisation. These empirical results reveal the presence of significant relationships, both in the short and...

Inflation in Central and East European countries varied considerably over the transition phase, and econometric relationships between prices, money, wages and exchange rates are said to have been unstable during this period. In order to shed some light on the issue, this paper analyses some...