"Research suggests this is but a small fraction of all the incidents of fabrication, falsification and plagiarism. In a survey published June 9 in the journal Nature, about 1.5 percent of 3,247 researchers who responded admitted to falsification or plagiarism. (One in three admitted to some type of professional misbehavior.)"
http://tinyurl.com/9qxx9
http://tinyurl.com/9qxx9