This paper implements an algorithm that can be used to solve systems of Black-Scholes equations for implied volatility and implied risk-free rate of return. After using a seemingly unrelated regressions (SUR) model to obtain point estimates for implied volatility and implied risk-free rate, the...

We examine how trade policy uncertainty is reflected in stock returns. Our identification strategy exploits quasi-experimental variation in exposure to trade policy uncertainty arising from Congressional votes to revoke China's preferential tariff treatment between 1990 and 2001. More exposed...

We analyze panel data for the worldwide commodities sector using a sample of 6,323 firms from 69 countries with annual observations from 1999 to 2010. The effect of return on equity on market-to-book is time-varying and declining across the years in the sample. First, there is positive and...