Option prices seem to behave in ways inconsistent with the Black-Scholes model. Implied volatility varies with the strike price in a parabolic shape that is often called the volatility 'smile.' My objective in this paper is to identify implied probability distributions that might explain this...

This document proposes a general macroeconomic framework to analyze the behavior of inflation. This approach has two characteristics. The first is the distinction of monetary regimes based on the number of shocks that have a permanent effect on the price level. When all shocks have a permanent...