Retractions (fraud) on the rise

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Source: Journal of Medical Ethics
The highest “retraction index” in the study went to one of the world’s leading medical journals, The New England Journal of Medicine. In a statement for this article, it questioned the study’s methodology, noting that it considered only papers with abstracts, which are included in a small fraction of studies published in each issue. “Because our denominator was low, the index was high,” the statement said.  
In October 2011, for example, the journal Nature reported that published retractions had increased tenfold over the past decade, while the number of published papers had increased by just 44 percent. In 2010 The Journal of Medical Ethics published a study finding the new raft of recent retractions was a mix of misconduct and honest scientific mistakes.
http://www.nytimes.com/2012/04/17/science/rise-in-scientific-journal-retractions-prompts-calls-for-reform.html?_r=2&src=dayp&pagewanted=all