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 financial asset returns and prices. 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 assesses the quantitative impact of ambiguity on the historically observed financial asset returns and prices. 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...

The Great Recession, and the fiscal response to it, has revived interest in the size of fiscal multipliers. Standard business cycle models have difficulties generating multipliers greater than one. And they also cannot produce any significant state-dependence in the size of the multipliers over...

We enrich workhorse macroeconomic models with a mechanism that proxies strategic uncertainty and that manifests itself as waves of optimism and pessimism about the short-term economic outlook. We interpret this mechanism as variation in "confidence" and show that it helps account for many...

This paper aims to examine unemployment persistence in Spain by the soûcalled ''ladder'' effect. This arises when highly-skilled workers who do not find a job matching their skills accept jobs which previously were occupied by less qualified staff. We develop a dynamic general equilibrium...

This paper presents a dynamic model of structural unemployment and occupational choice in which an economy is subjected to aggregate reallocation shocks and workers may choose to incur costs to retrain in order to move into occupations that pay higher wages. As it is costly for workers to...