"Despite widespread application of real options theory in the literature, the extent to which firms actually delay irreversible investments following an increase in the uncertainty of their environment is not empirically well-known. This paper estimates firms' responsiveness to changes in...

"Tradable permit regulations have recently been implemented for climate change policy in many countries. One of the first mandatory markets was the EU Emission Trading System, whose first phase ran from 2005-07. Unlike taxes, permits expose firms to volatility in regulatory costs, but are...