The exact details of this new study are unclear, since it is not published, but basically, a survey of authors reveals (among those responded) a remarkably high rate of "ghostwriting" where someone not on the author list made major contributions to the writing of papers.
As I have said before - openness is a way around this --- but of course only if everyone is honest. What people did as part of a paper should be reported in as much detail as allowed. Who did experiments? Who did analysis? Who did writing? Etc etc etc. It should all be stated somewhere. And many journals are moving in this direction. But alas, apparently people are not revealing all the details. Not sure what the solution to this problem is - but I can't help but think that we need to revamp the general discussion of authorship ethics within the scientific community ---