Overseen by a third party? Paid for by Aspen, you mean. There are plenty of problems with that "study". So many, in fact, that I thought you had long ago given up on defending it.
Here's a detailed thread on the topic (of which there are many). Let's keep discussion of the Behrens study to that thread, if we can, as it's closer to the topic than this thread. Far too many threads have been derailed talking about that study.