I think it all comes back to simply...and you're right. You can have discrepancies in data and figures. It's not that one is wrong or right. You just have to appreciate that they are coming from different sources. As we say, there is surveying. Some are based on actual transactions. Then some are based on transactions as well, but are brought about in a different way, maybe through brokerage or bilateral versus screen-traded.
I'm not sure that we see an issue there to the extent that the source is disclosed. If it's simply “here's a source and here's how it's compiled and brought together”, it's really up to the users to determine which one they feel is more appropriate for their purposes. I think that's commonplace through the variety of sources, but I think it's just based on what the source is, and it's up to the user.