In this paper we investigate the existence of the economies of scale and density in the Italian water sector, in the period 2005-2007. For this purpose, given the current developments of the reform introduced by the Galli Law, we review the main studies on the cost variables and on the evidence...

Financial time series analysis has focused on data related to market trading activity. Next to the modeling of the conditional variance of returns within the GARCH family of models, recent attention has been devoted to other variables: first, and foremost, volatility measured on the basis of...

When observed over a large panel, measures of risk (such as realized volatilities) usually exhibit a secular trend around which individual risks cluster. In this article we propose a vector Multiplicative Error Model achieving a decomposition of each risk measure into a common systematic and an...

Nell'ottica di una valutazione dell'impatto di riforme del sistema di imposte e benefici sull'offerta di lavoro, sulla finanza pubblica e sulla distribuzione del reddito rivestono fondamentale importanza la qualità e la reliability dei dati necessari alla costruzione del data-set di variabili...

The explosion of algorithmic trading has been one of the most prominent recent trends in the financial industry. Algorithmic trading consists of automated trading strategies that attempt to minimize transaction costs by optimally placing orders. The key ingredient of many of these strategies are...

In questo articolo si sviluppa un nuovo approccio per il calcolo del Value-at-Risk che utilizza il Filtro di Kalman per stimare il beta dei titoli di un portafoglio. Tale tecnica viene applicata al portafoglio azionario di una società assicurativa e confrontata con i metodi tradizionali basati...

Questo saggio analizza il NAIRU utilizzando un VAR cointegrato e dati che riferiscono al mercato del lavoro italiano. In questo saggio si mostrerà perché un VAR cointegrato rappresenta un approccio statisticamente adeguato alla stima del NAIRU, cioè un modo efficace di superare i diversi...

We investigate the occurrence of risk sharing among Italian regions with respect to both long run and short run income fluctuations by means of Vector Equilibrium Correction Models (VEqCMs) which allow to test all implications of the theory without preliminary filtering or transformations of...

Nonlinear time series models can exhibit components such as long range trends and seasonalities that may be modeled in a flexible fashion. The resulting unconstrained maximum likelihood estimator can be too heavily parameterized and suboptimal for forecasting purposes. The paper proposes the use...