[ryanmarsh]

Similarly, I heard someone the other day assert that no one had done an double blind placebo controlled trial of the effects of FDA regulation.

[hannob]

That is probably true, but do you have any proposal how such a trial should be done?

RCTs are good when they can be done and I'm all for doing more of them and too often there's no good excuse for not doing them. But at some level things just get impractical.