This paper uses the methodology of Hansen and Jaganathan (1991) to derive a lower bound on the correlation between any pair of asset returns under the hypothesis of complete markets. The bound is a simple function of the two assets' Sharpe ratios and the coefficient of variation of a unique...

This paper studies a banking industry subject to common and idiosyncratic shocks. We compare two types of regulatory closure rules: (1) an “absolute closure rule,” which closes banks when their asset–liability ratios fall below a given threshold, and (2) a “relative closure rule,”...

This paper uses Blanchard's (1985) model to study the relationship between budget deficits and trade deficits. The model is applied to annual post-war data from the U.S., Japan, and Germany. I find that in all three countries there is a significant link between trade deficits and budget...

This paper studies decision making by agents who value optimism, but are unsure of their environment. As in Brunnermeier and Parker (2005), an agent’s optimism is assumed to be tempered by the decision costs it imposes. As in Hansen and Sargent (2008), an agent’s uncertainty about his...