We propose a new class of multivariate volatility models utilizing realized measures of asset volatility and covolatility extracted from high-frequency data. Dimension reduction for estimation of large covariance matrices is achieved by imposing a factor structure with time-varying conditional...

This paper assesses the quantitative impact of ambiguity on the historically observed equity premium. We consider a Lucas-tree pure exchange economy with a single agent where we introduce two key non-standard assumptions. First, the agent's beliefs about the dividend/consumption process is...

This paper assesses the quantitative impact of ambiguity on the historically observed equity premium. We consider a Lucas-tree pure–exchange economy with a single agent where we introduce two key non- standard assumptions. First, the agent's beliefs about the dividend/consumption process is...

This paper assesses the quantitative impact of ambiguity on historically observed financial asset returns and growth rates. The single agent, in a dynamic exchange economy, treats the conditional uncertainty about the consumption and dividends next period as ambiguous. We calibrate the agent's...

This paper assessed the quantitative impact of ambiguity on historically observed financial asset returns and growth rates. The single agent, in a dynamic exchange economy, treats the conditional uncertainty about the consumption and dividends next period as ambiguous. We calibrate the agent's...