Venture capital has become a dominant form of innovation finance, used by many high-tech startups. Europe lags the U.S. in both VC activity and the creation of successful startups, and has recently been surpassed by China. Few European countries have rates of VC activity commensurable to their...

One response to uncertainty and transactions costs in VC-finance is to compensate founders (and other key personnel) with stock options under complex contracts. Entrepreneurs are granted stock options contingent on firm performance, vesting and other criteria. While most countries tax stock...

We introduce uncertainty into Holmstrom and Milgrom (1987) to study optimal long-term contracting with learning. In a dynamic relationship, the agent's shirking not only reduces current performance but also increases the agent’s information rent due to the persistent belief manipulation...

We provide evidence of a strong effect of the underlying stock's illiquidity on option prices by showing that the average absolute difference between historical and implied volatility increases with stock illiquidity. This pattern translates into significant excess returns of option trading...

Standard principal-agent theory predicts that large firms should not use employee stock options and other stock-based compensation to provide incentives to non-executive employees. Yet, business practitioners appear to believe that stock-based compensation improves incentives, and mounting...