It compares badly. Unfortunately too much private research is allowed to be kept secret - but what is known indicates it's of poorer quality - judged by the kin

It compares badly. Unfortunately too much private research is allowed to be kept secret - but what is known indicates it's of poorer quality - judged by the kind of metrics the Cochrane Institute use. Goldacre's book (he also has a blog) is well worth reading - describing _many_ ways in which drug companies can cheat.