Aggressive tax planning has become a sustainability problem, as governments have to cope with less tax revenue, which is crucial for investments in sustainable development goals. The OECD and the EU authorities have taken several initiatives against aggressive tax planning, such as the Action...

The valuation of multi-staged pharmaceutical R&D can be interpreted as a chain of real options. In valuing these compound option models, a crucial problem is how to deal with the different types of risk. Previous models, such as Cassimon et al. (2004), offer a closed-form solution for the...