There are definitely impacts that can't be quantified. Part of our methodology was to think about everything that could be quantified and all of the social impacts that maybe couldn't be. Obviously, there are all kinds of different research going on. Social impact research is when you think about things like noise reduction or GHG emissions being reduced. When you start thinking about those things, they have an impact not just on the business whose project is under way but also on society. Those are some things that are very difficult to quantify, which is the reason for the range.
The economists who did this work for us said that's what brings them to feeling as though that upper boundary makes a lot more sense—when you start thinking about all of the social impacts of research that are very difficult, to your point, to quantify in dollar terms.