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Università della Svizzera italiana

Robust value at risk prediction

Mancini, Loriano ; Trojani, Fabio

In: Journal of financial econometrics, 2011, vol. 9, no. 2, p. 281-313

This paper proposes a robust semiparametric bootstrap method to estimate predictive distributions of GARCH-type models. The method is based on a robust estimation of parametric GARCH models and a robustified resampling scheme for GARCH residuals that controls bootstrap instability due to outlying observations. A Monte Carlo simulation shows that our robust method provides more accurate VaR...

Università della Svizzera italiana

Robustness and ambiguity aversion in general equilibrium

Trojani, Fabio ; Vanini, Paolo

In: Review of Finance, 2004, vol. 8, no. 2, p. 279-324

We analyze the empirical predictions arising from settings of ambiguity aversion in intertemporal heterogenous agents economies. We study equilibria for two tractable wealth-homothetic settings of ambiguity aversion in continuous time. Such settings are motivated by a different robust control optimization problem. We show that ambiguity aversion affects optimal portfolio exposures in a way that...