How to sustain cooperation is a key challenge for any society. Different social organizations have evolved in the course of history to cope with this challenge by relying on different combinations of external (formal and informal) enforcement institutions and intrinsic motivation. Some societies...

This paper proposes a dynamic risk-based model that captures the high expected returns on value stocks relative to growth stocks, and the failure of the capital asset pricing model to explain these expected returns. To model the difference between value and growth stocks, we introduce a...

Berkshire Hathaway has realized a Sharpe ratio of 0.76, higher than any other stock or mutual fund with a history of more than 30 years, and Berkshire has a significant alpha to traditional risk factors. However, we find that the alpha becomes insignificant when controlling for exposures to...

We document the existence of excess returns to naïve currency trading strategies during the emergence of the modern foreign exchange market in the 1920s and 1930s. This era of active currency speculation constitutes a natural out-of-sample test of the performance of carry, momentum and value...

This Paper analyses the effect of a possible takeover on information flows and on the terms of trade in business relationships. We consider a long-term relationship between a firm and a privately-informed stakeholder, a buyer for example. In our model, takeovers both increase the surplus from...